Differences

This shows you the differences between two versions of the page.

--- mycnc:linear_encoder_setup [2019/12/05 13:07] – ivan
+++ mycnc:linear_encoder_setup [2020/11/23 12:31] – ivan
@@ Line 28: / Line 28: @@
 {{:mycnc:encoders-003-m4e.png}}
+====Step-by-step setup example====
+THIS SECTION OF THE MANUAL IS A WORK-IN-PROGRESS. Please contact the myCNC Support Team should any questions arise.
+Going through the setup process for linear encoder feedback:
+.
+At this point, the PID number, motor output and encoder channel number should be respectively equal.
+I.e -
+PID0, Motor0, Encoder0
+PID1, Motor1, Encoder1
+PID2, Motor2, Encoder2
+It is possible to customize arbitrarily, but so far it is strongly discouraged.
+[IMAGE 1]
+.
+Registers for displaying the magnitude of the PID mismatch error - 9016, 9017, 9018, 9019 ... and so on
+for PID 0, 1, 2, 3 ... respectively
+.
+Baseline Profile for Ruler, Feedback and PID - X1366M4E
+For PID tuning, it is recommended to output these registers to display the error value on the error indicator
+and on the corresponding "oscillograms"
+Now the XML settings in the profile are different, the version will be updated.
+For those who have a profile already in work and a complete update is difficult, you need to make changes manually
+.
+Error magnitude display, coordinates-4.xml file
+<code XML><!--Encoder values -->
+<gitem where="x-coordinates" position="74;40" width="120" height="30"  displayAlignment="left;vcenter"
+ fgColor="##f-machinepos" format="%8.3f" fontFamily="Open Sans" fontSize="16" type="display" deviation="0.0005"
+ name="display-cnc-gvariable-9016"
+ tooltip="Encoder error value for axis X"
+ bgColor="##b-display" displayWidth="120" fontStyle="bold"></gitem>
+<gitem where="x-coordinates" position="74;100" width="120" height="30"  displayAlignment="left;vcenter"
+ fgColor="##f-machinepos" format="%8.3f" fontFamily="Open Sans" fontSize="16" type="display" deviation="0.0005"
+ name="display-cnc-gvariable-9017"
+ tooltip="Encoder error value for axis Y"
+ bgColor="##b-display" displayWidth="120" fontStyle="bold"></gitem>
+<gitem where="x-coordinates" position="74;160" width="120" height="30"  displayAlignment="left;vcenter"
+ fgColor="##f-machinepos" format="%8.3f" fontFamily="Open Sans" fontSize="16" type="display" deviation="0.0005"
+ name="display-cnc-gvariable-9018"
+ tooltip="Encoder error value for axis Z"
+ bgColor="##b-display" displayWidth="120" fontStyle="bold"></gitem>
+<gitem where="x-coordinates" position="74;200" width="120" height="30"  displayAlignment="left;vcenter"
+ fgColor="##f-machinepos" format="%8.3f" fontFamily="Open Sans" fontSize="16" type="display" deviation="0.0005"
+ name="display-cnc-gvariable-9019"
+ tooltip="Encoder error value for axis A"
+ bgColor="##b-display" displayWidth="120" fontStyle="bold"></gitem> </code>
+In the current version, registers 9232, 9233, ... were used at this location.
+five.
+Display of the following error graphs
+X-bottab-left-mill.xml file
+The type myscope is responsible for displaying oscillograms
+Find and correct for displaying 3 graphs on one oscillogram
+with variables 9016, 9017, 9018 - for errors PID0, PID1, PID2
+<code XML><gitem where="x-graph" position="10;10" width="880" height="380"
+ name="myscope1" type="myscope" yrange="-300;300" K="1"
+ source="cnc-gvariable-9016;cnc-gvariable-9017;cnc-gvariable-9018" sampling="50" /></code>
+[IMAGE 2 HERE]
+.
+In order for registers 9016, ... to show an error, the PID must be enabled.
+This requires 2 steps -
+) Check enable in the PID settings pullse-dir closed-loop
+) Start the Servo-ON procedure by writing "1" to register 60000
+<code>gvarset (60000,1); // run Servo ON procedure </code>
+For automatic inclusion, this line can be added to __HANDLER_INIT
+For manual start, there is a Servo-ON button, which, in turn, starts the __HANDLER_SERVO_ON procedure
+And in it, in turn, there is a necessary entry in the register (after some other actions, for example, to include
+Servo-ON signals on drives, etc.)
+[IMAGE 3 HERE]
+[IMAGE 4 HERE]
+By means of a multiplier and a divider, the "software" resolution of the linear encoder must be brought to the "pulse-per-mm" resolution.
+The controller will then operate with this program value.
+That is, in the "Linear Encoder Dimension" field, you must specify the resolution taking into account these factors and divisors.
+(If the PIDs are turned off and not used, but you just need to have a position indication, then other registers are used for display, the multiplier and divider fields are not used, and then the real resolution of the ruler is indicated in the "Linear Encoder Dimension". In general, in this place it turned out very unobvious setting, if we figure out how to do it more clearly, we will redo it)
+Now also write the correct "K" for displaying graphs and error values.