Changes for page 07 Adjustments

Last modified by Iris on 2025/07/24 11:03

From 16.5 to 16.4 From 18.2 to 18.1

From version 18.1

edited by Stone Wu
on 2022/09/23 14:44

Change comment: There is no comment for this version

To version 16.5

edited by Stone Wu
on 2022/08/30 11:22

Change comment: There is no comment for this version

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@@ -4,7 +4,7 @@
  (% style="text-align:center" %)
  (((
--(% class="wikigeneratedid img-thumbnail" style="display:inline-block" %)
++(% class="wikigeneratedid" style="display:inline-block" %)
  [[**Figure 7-1 Gain adjustment process**>>image:image-20220608174118-1.png||id="Iimage-20220608174118-1.png"]]
  )))
@@ -15,7 +15,7 @@
  ✎**Note: **Before adjusting the gain, it is recommended to perform a jog trial run first to ensure that the servo motor can operate normally! The gain adjustment process description is shown in the table below.
  )))
--(% class="table-bordered" style="margin-right:auto" %)
++(% class="table-bordered" %)
  |=(% colspan="3" style="text-align: center; vertical-align: middle;" %)**Gain adjustment process**|=(% style="text-align: center; vertical-align: middle;" %)**Function**|=(% style="text-align: center; vertical-align: middle;" %)**Detailed chapter**
  |(% style="text-align:center; vertical-align:middle" %)1|(% colspan="2" style="text-align:center; vertical-align:middle" %)Online inertia recognition|(% style="text-align:center; vertical-align:middle" %)Use the host computer debugging platform software matched with the drive to automatically identify the load inertia ratio. With its own inertia identification function, the drive automatically calculates the load inertia ratio.|(% style="text-align:center; vertical-align:middle" %)__[[7.2>>||anchor="HInertiarecognition"]]__
  |(% style="text-align:center; vertical-align:middle" %)2|(% colspan="2" style="text-align:center; vertical-align:middle" %)Automatic gain adjustment|On the premise of setting the inertia ratio correctly, the drive automatically adjusts a set of matching gain parameters.|(% style="text-align:center; vertical-align:middle" %)__[[7.3.1>>||anchor="HAutomaticgainadjustment"]]__
@@ -30,11 +30,11 @@
  Load inertia ratio P03-01 refers to:
  (% style="text-align:center" %)
--[[image:image-20220611152902-1.png||class="img-thumbnail"]]
++[[image:image-20220611152902-1.png]]
  The load inertia ratio is an important parameter of the servo system, and setting of the load inertia ratio correctly helps to quickly complete the debugging. The load inertia ratio could be set manually, and online load inertia recognition could be performed through the host computer debugging software.
--(% class="warning" %)|(((
++|(((
  (% style="text-align:center" %)
  [[image:image-20220611152918-2.png]]
  )))
@@ -60,28 +60,28 @@
  (% class="table-bordered" %)
  |=(% scope="row" style="text-align: center; vertical-align: middle; width: 117px;" %)**Function code**|=(% style="text-align: center; vertical-align: middle; width: 136px;" %)**Name**|=(% style="text-align: center; vertical-align: middle; width: 173px;" %)(((
  **Setting method**
--)))|=(% style="text-align: center; vertical-align: middle; width: 168px;" %)(((
++)))|=(% style="text-align: center; vertical-align: middle; width: 213px;" %)(((
  **Effective time**
--)))|=(% style="text-align: center; vertical-align: middle; width: 125px;" %)**Default value**|=(% style="text-align: center; vertical-align: middle; width: 118px;" %)**Range**|=(% style="text-align: center; vertical-align: middle; width: 276px;" %)**Definition**|=(% style="text-align: center; vertical-align: middle;" %)**Unit**
++)))|=(% style="text-align: center; vertical-align: middle; width: 117px;" %)**Default value**|=(% style="text-align: center; vertical-align: middle; width: 118px;" %)**Range**|=(% style="text-align: center; vertical-align: middle; width: 276px;" %)**Definition**|=(% style="text-align: center; vertical-align: middle;" %)**Unit**
  |=(% style="text-align: center; vertical-align: middle; width: 117px;" %)P03-01|(% style="text-align:center; vertical-align:middle; width:136px" %)Load inertia ratio|(% style="text-align:center; vertical-align:middle; width:173px" %)(((
  Operation setting
--)))|(% style="text-align:center; vertical-align:middle; width:168px" %)(((
++)))|(% style="text-align:center; vertical-align:middle; width:213px" %)(((
  Effective immediately
--)))|(% style="text-align:center; vertical-align:middle; width:125px" %)300|(% style="text-align:center; vertical-align:middle; width:118px" %)100 to 10000|(% style="width:276px" %)Set load inertia ratio, 0.00 to 100.00 times|(% style="text-align:center; vertical-align:middle" %)0.01
++)))|(% style="text-align:center; vertical-align:middle; width:117px" %)300|(% style="text-align:center; vertical-align:middle; width:118px" %)100 to 10000|(% style="width:276px" %)Set load inertia ratio, 0.00 to 100.00 times|(% style="text-align:center; vertical-align:middle" %)0.01
  |=(% style="text-align: center; vertical-align: middle; width: 117px;" %)P03-05|(% style="text-align:center; vertical-align:middle; width:136px" %)(((
  Inertia recognition turns
  )))|(% style="text-align:center; vertical-align:middle; width:173px" %)(((
  Shutdown setting
--)))|(% style="text-align:center; vertical-align:middle; width:168px" %)(((
++)))|(% style="text-align:center; vertical-align:middle; width:213px" %)(((
  Effective immediately
--)))|(% style="text-align:center; vertical-align:middle; width:125px" %)2|(% style="text-align:center; vertical-align:middle; width:118px" %)1 to 20|(% style="width:276px" %)Offline load inertia recognition process, motor rotation number setting|(% style="text-align:center; vertical-align:middle" %)circle
++)))|(% style="text-align:center; vertical-align:middle; width:117px" %)2|(% style="text-align:center; vertical-align:middle; width:118px" %)1 to 20|(% style="width:276px" %)Offline load inertia recognition process, motor rotation number setting|(% style="text-align:center; vertical-align:middle" %)circle
  |=(% style="text-align: center; vertical-align: middle; width: 117px;" %)P03-06|(% style="text-align:center; vertical-align:middle; width:136px" %)(((
  Inertia recognition maximum speed
  )))|(% style="text-align:center; vertical-align:middle; width:173px" %)(((
  Shutdown setting
--)))|(% style="text-align:center; vertical-align:middle; width:168px" %)(((
++)))|(% style="text-align:center; vertical-align:middle; width:213px" %)(((
  Effective immediately
--)))|(% style="text-align:center; vertical-align:middle; width:125px" %)1000|(% style="text-align:center; vertical-align:middle; width:118px" %)300 to 2000|(% style="width:276px" %)(((
++)))|(% style="text-align:center; vertical-align:middle; width:117px" %)1000|(% style="text-align:center; vertical-align:middle; width:118px" %)300 to 2000|(% style="width:276px" %)(((
  Set the allowable maximum motor speed instruction in offline inertia recognition mode.
  The faster the speed during inertia recognition, the more accurate the recognition result will be. Usually, you can keep the default value.
@@ -90,9 +90,9 @@
  Parameter recognition rotation direction
  )))|(% style="text-align:center; vertical-align:middle; width:173px" %)(((
  Shutdown setting
--)))|(% style="text-align:center; vertical-align:middle; width:168px" %)(((
++)))|(% style="text-align:center; vertical-align:middle; width:213px" %)(((
  Effective immediately
--)))|(% style="text-align:center; vertical-align:middle; width:125px" %)0|(% style="text-align:center; vertical-align:middle; width:118px" %)0 to 2|(% style="width:276px" %)(((
++)))|(% style="text-align:center; vertical-align:middle; width:117px" %)0|(% style="text-align:center; vertical-align:middle; width:118px" %)0 to 2|(% style="width:276px" %)(((
 : Forward and reverse reciprocating rotation
 : Forward one-way rotation
@@ -116,9 +116,9 @@
  The rigidity of the servo refers to the ability of the motor rotor to resist load inertia, that is, the self-locking ability of the motor rotor. The stronger the servo rigidity, the larger the corresponding position loop gain and speed loop gain, and the faster the response speed of the system.
--(% class="table-bordered" style="margin-right:auto" %)
--(% class="warning" %)|(% style="text-align:center; vertical-align:middle" %)[[image:image-20220611152630-1.png]]
--|(% style="text-align:left; vertical-align:middle" %)Before adjusting the rigidity grade, set the appropriate load inertia ratio P03-01 correctly.
++(% class="table-bordered" %)
++|(% style="text-align:center; vertical-align:middle" %)[[image:image-20220611152630-1.png]]
++|(% style="text-align:center; vertical-align:middle" %)Before adjusting the rigidity grade, set the appropriate load inertia ratio P03-01 correctly.
  The value range of the rigidity grade is between 0 and 31. Grade 0 corresponds to the weakest rigidity and minimum gain, and grade 31 corresponds to the strongest rigidity and maximum gain. According to different load types, the values in the table below are for reference.
@@ -143,7 +143,7 @@
  * Step7 After the parameter measurement is completed, the host computer debugging software will pop up a confirmation window for parameter writing and saving.
  (% class="table-bordered" %)
--(% class="warning" %)|(% style="text-align:center; vertical-align:middle" %)[[image:image-20220611152634-2.png]]
++|(% style="text-align:center; vertical-align:middle" %)[[image:image-20220611152634-2.png]]
  |(((
  ✎There may be a short mechanical whistling sound during the test. Generally, the servo will automatically stop the test. If it does not stop automatically or in other abnormal situations, you can click the "Servo Off" button on the interface to turn off the servo, or power off the machine!
@@ -151,16 +151,16 @@
  )))
  (% class="table-bordered" %)
--|=(% scope="row" style="text-align: center; vertical-align: middle; width: 84px;" %)**Function code**|=(% style="text-align: center; vertical-align: middle; width: 138px;" %)**Name**|=(% style="text-align: center; vertical-align: middle; width: 103px;" %)(((
++|(% style="text-align:center; vertical-align:middle; width:84px" %)**Function code**|(% style="text-align:center; vertical-align:middle; width:138px" %)**Name**|(% style="text-align:center; vertical-align:middle; width:122px" %)(((
  **Setting method**
--)))|=(% style="text-align: center; vertical-align: middle; width: 105px;" %)(((
++)))|(% style="text-align:center; vertical-align:middle; width:129px" %)(((
  **Effective time**
--)))|=(% style="text-align: center; vertical-align: middle; width: 87px;" %)**Default value**|=(% style="text-align: center; vertical-align: middle; width: 83px;" %)**Range**|=(% style="text-align: center; vertical-align: middle; width: 431px;" %)**Definition**|=(% style="text-align: center; vertical-align: middle;" %)**Unit**
--|=(% style="text-align: center; vertical-align: middle; width: 84px;" %)P03-03|(% style="text-align:center; vertical-align:middle; width:138px" %)Self-adjusting mode selection|(% style="text-align:center; vertical-align:middle; width:103px" %)(((
++)))|(% style="text-align:center; vertical-align:middle; width:95px" %)**Default value**|(% style="text-align:center; vertical-align:middle; width:85px" %)**Range**|(% style="text-align:center; vertical-align:middle; width:430px" %)**Definition**|(% style="text-align:center; vertical-align:middle" %)**Unit**
++|(% style="text-align:center; vertical-align:middle; width:84px" %)P03-03|(% style="text-align:center; vertical-align:middle; width:138px" %)Self-adjusting mode selection|(% style="text-align:center; vertical-align:middle; width:122px" %)(((
  Operation setting
--)))|(% style="text-align:center; vertical-align:middle; width:105px" %)(((
++)))|(% style="text-align:center; vertical-align:middle; width:129px" %)(((
  Effective immediately
--)))|(% style="text-align:center; vertical-align:middle; width:87px" %)0|(% style="text-align:center; vertical-align:middle; width:83px" %)0 to 2|(% style="width:431px" %)(((
++)))|(% style="text-align:center; vertical-align:middle; width:95px" %)0|(% style="text-align:center; vertical-align:middle; width:85px" %)0 to 2|(% style="width:430px" %)(((
  * 0: Rigidity grade self-adjusting mode. Position loop gain, speed loop gain, speed loop integral time constant, torque filter parameter settings are automatically adjusted according to the rigidity grade setting.
  * 1: Manual setting; you need to manually set the position loop gain, speed loop gain, speed loop integral time constant, torque filter parameter setting
  * 2: Online automatic parameter self-adjusting mode (Not implemented yet)
@@ -176,7 +176,7 @@
  (% style="text-align:center" %)
  (((
--(% class="wikigeneratedid img-thumbnail" style="display:inline-block" %)
++(% class="wikigeneratedid" style="display:inline-block" %)
  [[**Figure 7-2 Basic block diagram of servo loop gain**>>image:image-20220608174209-2.png||id="Iimage-20220608174209-2.png"]]
  )))
@@ -221,7 +221,7 @@
  (% style="text-align:center" %)
  (((
--(% class="wikigeneratedid img-thumbnail" style="display:inline-block" %)
++(% class="wikigeneratedid" style="display:inline-block" %)
  [[**Figure 7-3 Speed loop gain effect illustration**>>image:image-20220706152743-1.jpeg||id="Iimage-20220706152743-1.jpeg"]]
  )))
@@ -258,7 +258,7 @@
  (% style="text-align:center" %)
  (((
--(% class="wikigeneratedid img-thumbnail" style="display:inline-block" %)
++(% class="wikigeneratedid" style="display:inline-block" %)
  [[**Figure 7-4 Speed loop integral time constant effect illustration**>>image:image-20220706153140-2.jpeg||id="Iimage-20220706153140-2.jpeg"]]
  )))
@@ -267,27 +267,27 @@
  Determine the highest frequency of the position instruction that the position loop can follow the change. Increasing this parameter can speed up the positioning time and improve the ability of the motor to resist external disturbances when the motor is stationary. However, if the setting value is too large, the system may be unstable and oscillate. The related function codes are shown as below.
  (% class="table-bordered" %)
--|=(% scope="row" style="text-align: center; vertical-align: middle; width: 95px;" %)**Function code**|=(% style="text-align: center; vertical-align: middle; width: 174px;" %)**Name**|=(% style="text-align: center; vertical-align: middle; width: 120px;" %)(((
++|=(% scope="row" style="text-align: center; vertical-align: middle; width: 95px;" %)**Function code**|=(% style="text-align: center; vertical-align: middle; width: 159px;" %)**Name**|=(% style="text-align: center; vertical-align: middle; width: 114px;" %)(((
  **Setting method**
--)))|=(% style="text-align: center; vertical-align: middle; width: 114px;" %)(((
++)))|=(% style="text-align: center; vertical-align: middle; width: 108px;" %)(((
  **Effective time**
--)))|=(% style="text-align: center; vertical-align: middle; width: 79px;" %)**Default value**|=(% style="text-align: center; vertical-align: middle; width: 91px;" %)**Range**|=(% style="text-align: center; vertical-align: middle; width: 355px;" %)**Definition**|=(% style="text-align: center; vertical-align: middle;" %)**Unit**
--|=(% style="text-align: center; vertical-align: middle; width: 95px;" %)P02-01|(% style="text-align:center; vertical-align:middle; width:174px" %)1st position loop gain|(% style="text-align:center; vertical-align:middle; width:120px" %)(((
++)))|=(% style="text-align: center; vertical-align: middle; width: 108px;" %)**Default value**|=(% style="text-align: center; vertical-align: middle; width: 114px;" %)**Range**|=(% style="text-align: center; vertical-align: middle; width: 355px;" %)**Definition**|=(% style="text-align: center; vertical-align: middle;" %)**Unit**
++|=(% style="text-align: center; vertical-align: middle; width: 95px;" %)P02-01|(% style="text-align:center; vertical-align:middle; width:159px" %)1st position loop gain|(% style="text-align:center; vertical-align:middle; width:114px" %)(((
  Operation setting
--)))|(% style="text-align:center; vertical-align:middle; width:114px" %)(((
++)))|(% style="text-align:center; vertical-align:middle; width:108px" %)(((
  Effective immediately
--)))|(% style="text-align:center; vertical-align:middle; width:79px" %)400|(% style="text-align:center; vertical-align:middle; width:91px" %)0 to 6200|(% style="width:355px" %)Set position loop proportional gain to determine the responsiveness of position control system.|(% style="text-align:center; vertical-align:middle" %)0.1Hz
--|=(% style="text-align: center; vertical-align: middle; width: 95px;" %)P02-04|(% style="text-align:center; vertical-align:middle; width:174px" %)2nd position loop gain|(% style="text-align:center; vertical-align:middle; width:120px" %)(((
++)))|(% style="text-align:center; vertical-align:middle; width:108px" %)400|(% style="text-align:center; vertical-align:middle; width:114px" %)0 to 6200|(% style="width:355px" %)Set position loop proportional gain to determine the responsiveness of position control system.|(% style="text-align:center; vertical-align:middle" %)0.1Hz
++|=(% style="text-align: center; vertical-align: middle; width: 95px;" %)P02-04|(% style="text-align:center; vertical-align:middle; width:159px" %)2nd position loop gain|(% style="text-align:center; vertical-align:middle; width:114px" %)(((
  Operation setting
--)))|(% style="text-align:center; vertical-align:middle; width:114px" %)(((
++)))|(% style="text-align:center; vertical-align:middle; width:108px" %)(((
  Effective immediately
--)))|(% style="text-align:center; vertical-align:middle; width:79px" %)35|(% style="text-align:center; vertical-align:middle; width:91px" %)0 to 6200|(% style="width:355px" %)Set position loop proportional gain to determine the responsiveness of position control system.|(% style="text-align:center; vertical-align:middle" %)0.1Hz
++)))|(% style="text-align:center; vertical-align:middle; width:108px" %)35|(% style="text-align:center; vertical-align:middle; width:114px" %)0 to 6200|(% style="width:355px" %)Set position loop proportional gain to determine the responsiveness of position control system.|(% style="text-align:center; vertical-align:middle" %)0.1Hz
  Table 7-7 Position loop gain parameters
  (% style="text-align:center" %)
  (((
--(% class="wikigeneratedid img-thumbnail" style="display:inline-block" %)
++(% class="wikigeneratedid" style="display:inline-block" %)
  [[**Figure 7-5 Position loop gain effect illustration**>>image:image-20220706153656-3.jpeg||id="Iimage-20220706153656-3.jpeg"]]
  )))
@@ -298,14 +298,14 @@
  (% class="table-bordered" %)
  |=(% scope="row" style="text-align: center; vertical-align: middle; width: 117px;" %)**Function code**|=(% style="text-align: center; vertical-align: middle; width: 200px;" %)**Name**|=(% style="text-align: center; vertical-align: middle; width: 120px;" %)(((
  **Setting method**
--)))|=(% style="text-align: center; vertical-align: middle; width: 127px;" %)(((
++)))|=(% style="text-align: center; vertical-align: middle; width: 133px;" %)(((
  **Effective time**
--)))|=(% style="text-align: center; vertical-align: middle; width: 79px;" %)**Default value**|=(% style="text-align: center; vertical-align: middle; width: 371px;" %)**Definition**|=(% style="text-align: center; vertical-align: middle;" %)**Unit**
++)))|=(% style="text-align: center; vertical-align: middle; width: 142px;" %)**Default value**|=(% style="text-align: center; vertical-align: middle; width: 328px;" %)**Definition**|=(% style="text-align: center; vertical-align: middle;" %)**Unit**
  |=(% style="text-align: center; vertical-align: middle; width: 117px;" %)P04-04|(% style="text-align:center; vertical-align:middle; width:200px" %)Torque filter time constant|(% style="text-align:center; vertical-align:middle; width:120px" %)(((
  Operation setting
--)))|(% style="text-align:center; vertical-align:middle; width:127px" %)(((
++)))|(% style="text-align:center; vertical-align:middle; width:133px" %)(((
  Effective immediately
--)))|(% style="text-align:center; vertical-align:middle; width:79px" %)50|(% style="width:371px" %)This parameter is automatically set when “self-adjustment mode selection” is selected as 1 or 2|(% style="text-align:center; vertical-align:middle" %)0.01ms
++)))|(% style="text-align:center; vertical-align:middle; width:142px" %)50|(% style="width:328px" %)This parameter is automatically set when “self-adjustment mode selection” is selected as 1 or 2|(% style="text-align:center; vertical-align:middle" %)0.01ms
  Table 7-8 Details of torque filter time constant parameters
@@ -328,121 +328,122 @@
  Table 7-9 Speed feedforward parameters
--(% style="text-align:center" %)
--(((
--(% class="wikigeneratedid img-thumbnail" style="display:inline-block" %)
--[[**Figure 7-6 Speed feedforward parameters effect illustration**>>image:image-20220706155307-4.jpeg||height="119" id="Iimage-20220706155307-4.jpeg" width="835"]]
--)))
++[[image:image-20220706155307-4.jpeg]]
++Figure 7-6 Speed feedforward parameters effect illustration
  (% class="table-bordered" %)
--|=(% scope="row" style="text-align: center; vertical-align: middle; width: 125px;" %)**Function code**|=(% style="text-align: center; vertical-align: middle; width: 259px;" %)**Name**|=(% style="text-align: center; vertical-align: middle; width: 690px;" %)**Adjustment description**
--|=(% style="text-align: center; vertical-align: middle; width: 125px;" %)P02-11|(% style="text-align:center; vertical-align:middle; width:259px" %)Torque feedforward gain|(% rowspan="2" style="width:690px" %)Increase the torque feedforward gain because the position deviation can be close to 0 during certain acceleration and deceleration. Under the ideal condition of external disturbance torque not operating, when driving in the trapezoidal speed model, the position deviation can be close to 0 in the entire action interval. In fact, there must be external disturbance torque, so the position deviation cannot be zero. In addition, like the speed feedforward, although the larger the constant of the torque feedforward filter, the smaller the action sound, but the greater the position deviation of the acceleration change point.
--|=(% style="text-align: center; vertical-align: middle; width: 125px;" %)P02-12|(% style="text-align:center; vertical-align:middle; width:259px" %)Torque feedforward filtering time constant
++|(% style="text-align:center; vertical-align:middle; width:125px" %)**Function code**|(% style="text-align:center; vertical-align:middle; width:330px" %)**Name**|(% style="text-align:center; vertical-align:middle; width:746px" %)**Adjustment description**
++|(% style="text-align:center; vertical-align:middle; width:125px" %)P02-11|(% style="text-align:center; vertical-align:middle; width:330px" %)Torque feedforward gain|(% rowspan="2" style="width:746px" %)Increase the torque feedforward gain because the position deviation can be close to 0 during certain acceleration and deceleration. Under the ideal condition of external disturbance torque not operating, when driving in the trapezoidal speed model, the position deviation can be close to 0 in the entire action interval. In fact, there must be external disturbance torque, so the position deviation cannot be zero. In addition, like the speed feedforward, although the larger the constant of the torque feedforward filter, the smaller the action sound, but the greater the position deviation of the acceleration change point.
++|(% style="text-align:center; vertical-align:middle; width:125px" %)P02-12|(% style="text-align:center; vertical-align:middle; width:330px" %)Torque feedforward filtering time constant
  Table 7-10 Torque feedforward parameters
  = **Mechanical resonance suppression** =
--== Mechanical resonance suppression methods ==
++== **Mechanical resonance suppression methods** ==
  When the mechanical rigidity is low, vibration and noise may occur due to resonance caused by shaft twisting, and it may not be possible to increase the gain setting. In this case, by using a notch filter to reduce the gain at a specific frequency, after resonance is effectively suppressed, you can continue to increase the servo gain. There are 2 methods to suppress mechanical resonance.
--**Torque instruction filter**
++**(1) Torque instruction filter**
  By setting the filter time constant, the torque instruction is attenuated in the high frequency range above the cutoff frequency, so as to achieve the expectation of suppressing mechanical resonance. The cut-off frequency of the torque instruction filter could be calculated by the following formula:
  (% style="text-align:center" %)
--[[image:image-20220706155820-5.jpeg||class="img-thumbnail"]]
++[[image:image-20220706155820-5.jpeg]]
--**Notch filter**
++**(2) Notch filter**
--The notch filter can achieve the expectation of suppressing mechanical resonance by reducing the gain at a specific frequency. When setting the notch filter correctly, the vibration can be effectively suppressed. You can try to increase the servo gain. The principle of the notch filter is shown in __Figure 7-3__.
++The notch filter can achieve the expectation of suppressing mechanical resonance by reducing the gain at a specific frequency. When setting the notch filter correctly, the vibration can be effectively suppressed. You can try to increase the servo gain. The principle of the notch filter is shown in __[[Figure 7-3>>https://docs.we-con.com.cn/bin/download/Servo/2.%20User%20Manual/06%20VD2%20SA%20Series%20Servo%20Drives%20Manual%20%28Full%20V1.1%29/07%20Adjustments/WebHome/image-20220608174259-3.png?rev=1.1]]__.
--== Notch filter ==
++== **Notch filter** ==
  The VD2 series servo drives have 2 sets of notch filters, each of which has 3 parameters, namely notch frequency, width grade and depth grade.
--**Width grade of notch filter**
++**(1) Width grade of notch filter**
  The notch width grade is used to express the ratio of the notch width to the center frequency of the notch:
  (% style="text-align:center" %)
--[[image:image-20220706155836-6.png||class="img-thumbnail"]]
++[[image:image-20220706155836-6.png]]
  In formula (7-1), [[image:image-20220706155946-7.png]] is the center frequency of notch filter, that is, the mechanical resonance frequency; [[image:image-20220706155952-8.png]] is the width of notch filter, which represents the frequency bandwidth with an amplitude attenuation rate of **-3dB** relative to the center frequency of notch filter.
--**Depth grade of notch filter**
++**(2) Depth grade of notch filter**
  The depth grade of notch filter represents the ratio relationship between input and output at center frequency.
--When the notch filter depth grade is 0, the input is completely suppressed at center frequency. When the notch filter depth grade is 100, the input is completely passable at center frequency. Therefore, the smaller the the notch filter depth grade is set, the deeper the the notch filter depth, and the stronger the suppression of mechanical resonance. But the system may be unstable, you should pay attention to it when using it. The specific relationship is shown in __Figure 7-4__.
++When the notch filter depth grade is 0, the input is completely suppressed at center frequency. When the notch filter depth grade is 100, the input is completely passable at center frequency. Therefore, the smaller the the notch filter depth grade is set, the deeper the the notch filter depth, and the stronger the suppression of mechanical resonance. But the system may be unstable, you should pay attention to it when using it. The specific relationship is shown in __[[Figure 7-4>>https://docs.we-con.com.cn/bin/download/Servo/2.%20User%20Manual/06%20VD2%20SA%20Series%20Servo%20Drives%20Manual%20%28Full%20V1.1%29/07%20Adjustments/WebHome/44.png?rev=1.1]]__.
  (% style="text-align:center" %)
--(((
--(% class="wikigeneratedid img-thumbnail" style="display:inline-block" %)
--[[Figure 7-7 Notch characteristics, notch width, and notch depth>>image:image-20220608174259-3.png||id="Iimage-20220608174259-3.png"]]
--)))
++[[image:image-20220608174259-3.png]]
++Figure 7-7 Notch characteristics, notch width, and notch depth
  (% style="text-align:center" %)
--(((
--(% class="wikigeneratedid img-thumbnail" style="display:inline-block" %)
--[[Figure 7-8 Frequency characteristics of notch filter>>image:image-20220706160046-9.png||id="Iimage-20220706160046-9.png"]]
--)))
++[[image:image-20220706160046-9.png]]
++Figure 7-8 Frequency characteristics of notch filter
  (% class="table-bordered" %)
--|=(% scope="row" style="text-align: center; vertical-align: middle; width: 113px;" %)**Function code**|=(% style="text-align: center; vertical-align: middle; width: 155px;" %)**Name**|=(% style="text-align: center; vertical-align: middle; width: 115px;" %)(((
++|(% style="text-align:center; vertical-align:middle; width:113px" %)**Function code**|(% style="text-align:center; vertical-align:middle; width:197px" %)**Name**|(% style="text-align:center; vertical-align:middle; width:143px" %)(((
  **Setting method**
--)))|=(% style="text-align: center; vertical-align: middle; width: 121px;" %)(((
++)))|(% style="text-align:center; vertical-align:middle; width:164px" %)(((
  **Effective time**
--)))|=(% style="text-align: center; vertical-align: middle; width: 99px;" %)**Default value**|=(% style="text-align: center; vertical-align: middle; width: 102px;" %)**Range**|=(% style="text-align: center; vertical-align: middle; width: 362px;" %)**Definition**|=(% style="text-align: center; vertical-align: middle; width: 96px;" %)**Unit**
--|=(% style="text-align: center; vertical-align: middle; width: 113px;" %)P04-05|(% style="text-align:center; vertical-align:middle; width:155px" %)1st notch filter frequency|(% style="text-align:center; vertical-align:middle; width:115px" %)(((
++)))|(% style="text-align:center; vertical-align:middle; width:127px" %)**Default value**|(% style="text-align:center; vertical-align:middle; width:102px" %)**Range**|(% style="text-align:center; vertical-align:middle; width:391px" %)**Definition**|(% style="text-align:center; vertical-align:middle; width:248px" %)**Unit**
++|(% style="text-align:center; vertical-align:middle; width:113px" %)P04-05|(% style="text-align:center; vertical-align:middle; width:197px" %)1st notch filter frequency|(% style="text-align:center; vertical-align:middle; width:143px" %)(((
  Operation setting
--)))|(% style="text-align:center; vertical-align:middle; width:121px" %)(((
++)))|(% style="text-align:center; vertical-align:middle; width:164px" %)(((
  Effective immediately
--)))|(% style="text-align:center; vertical-align:middle; width:99px" %)300|(% style="text-align:center; vertical-align:middle; width:102px" %)250 to 5000|(% style="width:362px" %)Set the center frequency of the 1st notch filter. When the set value is 5000, the function of notch filter is invalid.|(% style="text-align:center; vertical-align:middle; width:96px" %)Hz
--|=(% style="text-align: center; vertical-align: middle; width: 113px;" %)P04-06|(% style="text-align:center; vertical-align:middle; width:155px" %)1st notch filter depth|(% style="text-align:center; vertical-align:middle; width:115px" %)(((
++)))|(% style="text-align:center; vertical-align:middle; width:127px" %)300|(% style="text-align:center; vertical-align:middle; width:102px" %)250 to 5000|(% style="width:391px" %)Set the center frequency of the 1st notch filter. When the set value is 5000, the function of notch filter is invalid.|(% style="text-align:center; vertical-align:middle; width:248px" %)Hz
++|(% style="text-align:center; vertical-align:middle; width:113px" %)P04-06|(% style="text-align:center; vertical-align:middle; width:197px" %)1st notch filter depth|(% style="text-align:center; vertical-align:middle; width:143px" %)(((
  Operation setting
--)))|(% style="text-align:center; vertical-align:middle; width:121px" %)(((
++)))|(% style="text-align:center; vertical-align:middle; width:164px" %)(((
  Effective immediately
--)))|(% style="text-align:center; vertical-align:middle; width:99px" %)100|(% style="text-align:center; vertical-align:middle; width:102px" %)0 to 100|(% style="width:362px" %)(((
--1. 0: all truncated
--1. 100: all passed
--)))|(% style="text-align:center; vertical-align:middle; width:96px" %)-
--|=(% style="text-align: center; vertical-align: middle; width: 113px;" %)P04-07|(% style="text-align:center; vertical-align:middle; width:155px" %)1st notch filter width|(% style="text-align:center; vertical-align:middle; width:115px" %)(((
++)))|(% style="text-align:center; vertical-align:middle; width:127px" %)100|(% style="text-align:center; vertical-align:middle; width:102px" %)0 to 100|(% style="width:391px" %)(((
++0: all truncated
++
++100: all passed
++)))|(% style="text-align:center; vertical-align:middle; width:248px" %)-
++|(% style="text-align:center; vertical-align:middle; width:113px" %)P04-07|(% style="text-align:center; vertical-align:middle; width:197px" %)1st notch filter width|(% style="text-align:center; vertical-align:middle; width:143px" %)(((
  Operation setting
--)))|(% style="text-align:center; vertical-align:middle; width:121px" %)(((
++)))|(% style="text-align:center; vertical-align:middle; width:164px" %)(((
  Effective immediately
--)))|(% style="text-align:center; vertical-align:middle; width:99px" %)4|(% style="text-align:center; vertical-align:middle; width:102px" %)0 to 12|(% style="width:362px" %)(((
--1. 0: 0.5 times the bandwidth
--1. 4: 1 times the bandwidth
--1. 8: 2 times the bandwidth
--1. 12: 4 times the bandwidth
--)))|(% style="text-align:center; vertical-align:middle; width:96px" %)-
--|=(% style="text-align: center; vertical-align: middle; width: 113px;" %)P04-08|(% style="text-align:center; vertical-align:middle; width:155px" %)2nd notch filter frequency|(% style="text-align:center; vertical-align:middle; width:115px" %)(((
++)))|(% style="text-align:center; vertical-align:middle; width:127px" %)4|(% style="text-align:center; vertical-align:middle; width:102px" %)0 to 12|(% style="width:391px" %)(((
++0: 0.5 times the bandwidth
++
++4: 1 times the bandwidth
++
++8: 2 times the bandwidth
++
++12: 4 times the bandwidth
++)))|(% style="text-align:center; vertical-align:middle; width:248px" %)-
++|(% style="text-align:center; vertical-align:middle; width:113px" %)P04-08|(% style="text-align:center; vertical-align:middle; width:197px" %)2nd notch filter frequency|(% style="text-align:center; vertical-align:middle; width:143px" %)(((
  Operation setting
--)))|(% style="text-align:center; vertical-align:middle; width:121px" %)(((
++)))|(% style="text-align:center; vertical-align:middle; width:164px" %)(((
  Effective immediately
--)))|(% style="text-align:center; vertical-align:middle; width:99px" %)500|(% style="text-align:center; vertical-align:middle; width:102px" %)250 to 5000|(% style="width:362px" %)Set the center frequency of the 2nd notch filter. When the set value is 5000, the function of the notch filter is invalid.|(% style="text-align:center; vertical-align:middle; width:96px" %)Hz
--|=(% style="text-align: center; vertical-align: middle; width: 113px;" %)P04-09|(% style="text-align:center; vertical-align:middle; width:155px" %)2nd notch filter depth|(% style="text-align:center; vertical-align:middle; width:115px" %)(((
++)))|(% style="text-align:center; vertical-align:middle; width:127px" %)500|(% style="text-align:center; vertical-align:middle; width:102px" %)250 to 5000|(% style="width:391px" %)Set the center frequency of the 2nd notch filter. When the set value is 5000, the function of the notch filter is invalid.|(% style="text-align:center; vertical-align:middle; width:248px" %)Hz
++|(% style="text-align:center; vertical-align:middle; width:113px" %)P04-09|(% style="text-align:center; vertical-align:middle; width:197px" %)2nd notch filter depth|(% style="text-align:center; vertical-align:middle; width:143px" %)(((
  Operation setting
--)))|(% style="text-align:center; vertical-align:middle; width:121px" %)(((
++)))|(% style="text-align:center; vertical-align:middle; width:164px" %)(((
  Effective immediately
--)))|(% style="text-align:center; vertical-align:middle; width:99px" %)100|(% style="text-align:center; vertical-align:middle; width:102px" %)0 to 100|(% style="width:362px" %)(((
--1. 0: all truncated
--1. 100: all passed
--)))|(% style="text-align:center; vertical-align:middle; width:96px" %)-
--|=(% style="text-align: center; vertical-align: middle; width: 113px;" %)P04-10|(% style="text-align:center; vertical-align:middle; width:155px" %)2nd notch filter width|(% style="text-align:center; vertical-align:middle; width:115px" %)(((
++)))|(% style="text-align:center; vertical-align:middle; width:127px" %)100|(% style="text-align:center; vertical-align:middle; width:102px" %)0 to 100|(% style="width:391px" %)(((
++0: all truncated
++
++100: all passed
++)))|(% style="text-align:center; vertical-align:middle; width:248px" %)-
++|(% style="text-align:center; vertical-align:middle; width:113px" %)P04-10|(% style="text-align:center; vertical-align:middle; width:197px" %)2nd notch filter width|(% style="text-align:center; vertical-align:middle; width:143px" %)(((
  Operation setting
--)))|(% style="text-align:center; vertical-align:middle; width:121px" %)(((
++)))|(% style="text-align:center; vertical-align:middle; width:164px" %)(((
  Effective immediately
--)))|(% style="text-align:center; vertical-align:middle; width:99px" %)4|(% style="text-align:center; vertical-align:middle; width:102px" %)0 to 12|(% style="width:362px" %)(((
--1. 0: 0.5 times the bandwidth
--1. 4: 1 times the bandwidth
--1. 8: 2 times the bandwidth
--1. 12: 4 times the bandwidth
--)))|(% style="text-align:center; vertical-align:middle; width:96px" %)-
++)))|(% style="text-align:center; vertical-align:middle; width:127px" %)4|(% style="text-align:center; vertical-align:middle; width:102px" %)0 to 12|(% style="width:391px" %)(((
++0: 0.5 times the bandwidth
++4: 1 times the bandwidth
++
++8: 2 times the bandwidth
++
++12: 4 times the bandwidth
++)))|(% style="text-align:center; vertical-align:middle; width:248px" %)-
++
  Table 7-11 Notch filter function code parameters

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