Adding Servo Motors To Modix Big Metter

ShawnTexan

New to Duet Reprap stuff so please forgive my ignorance. I bought a Modix big meter and to sum it up simply it sucks as a machine and support is terrible.

Duet 2 Wifi Board
Im adding 7 servo motors that have built in drivers and supports step dir commands. my plan is to take the 5 step dir commands coming out the expansion port and send that logic to the controllers on the motors. I need 2 other channels the 10 and 11 for the other axis. how do I enable the output on the expansion port and which pins on the connector are the correct ones for step and dir. Looks like bottom left should be pin 1 but if anyone knows for sure the pinouts it would be helpful.

Also any other help with those who have done this as far as setting the config up to work better with servo motors.

Im currently wiring up everything now and hope to start testing later this week once all the connectors are done. Thanks a bunch, Shawn

T3P3Tony

@ShawnTexan Have a look at the documentation here:

https://docs.duet3d.com/en/User_manual/Connecting_hardware/Motors_connecting_external

ShawnTexan

@T3P3Tony Awesome thanks very helpful Here is the current motor config settings.
What does the "S0" mean. If I need to remap them is it just editing the text on the right "Physical drive 0 . X1" as an example to match the axis. thanks Shawn

; Drives_________________________________________________________________________
;Main board______________________________________________________________________
M569 P0 S0 ; Physical drive 0 . X1
M569 P1 S1 ; Physical drive 1 . X2
M569 P2 R-1 ; Physical drive 2 . Canceled
M569 P3 S0 ; Physical drive 3 goes backwards. E0-Extruder.
M569 P4 S0 ; Physical drive 4 goes forwards. E1-Extruder.
;Duex5 board_____________________________________________________________________
M569 P5 S0 ; Physical drive 5 . Y
M569 P6 S0 ; Physical drive 6 . Z1 (0,1000)
M569 P7 S0 ; Physical drive 7 . Z2 (0,0)
M569 P8 S0 ; Physical drive 8 . Z3 (1000,0)
M569 P9 S0 ; Physical drive 9 . Z4 (1000,1000)

dc42

@ShawnTexan S0 in M569 reverses the direction of that motor from the default.

ShawnTexan

@dc42 Thank you. I have the servo motor connected but its not moving from the step Dr commands. Im working with the motor vendor is there a way in the config to change the pulse output from the commands. Trying to match them to the motor. Shawn

T3P3Tony

@ShawnTexan have a look at the T parameter of M569:

https://docs.duet3d.com/en/User_manual/Reference/Gcodes#m569-set-motor-driver-direction-enable-polarity-mode-and-step-pulse-timing