Hi, I have Shapeoko CNC router and want to use servo motor using PWM pin (D11) via universal gcode sender But unfortunately, M3, M4 or M5 code is not making any movement on servo motor (MG955) like rotating or on or off the servo motor which is attached with PWM pin , 5V and Grd. No error also not showing in the universal gcode sender. is there any modification required on config .h and upload grblupload once again? Anyone can support me to solve this issue? Info: GRBL version 1.1
You need a Servo capable Grbl build, stock Grbl does not support Servos. See cprezzi/grbl-servo Then control it with M3 Sxxx where xxx = number between 0 and 255
That developer (cprezzi) does not offer support, so you will need to play with it on your own, or perhaps the supplier of your machine/controller can offer advice. See cprezzi/grbl-servo Compile and upload. Perhaps you did not upload correctly? Or have it wired wrong? Are you sending M3 Sxxx (not M3 on its own) Or replace your controller with an OpenBuilds BlackBox BlackBox Motion Control System then you can use: OpenBuilds BlackBox 4X Documentation
Thanks alot. One more time I will upload and try. I ahve tried M3/ M03 / M3S1000 / M03S10000/ M03225/ M3 225
Wow worked out ......$32 - laser was enabled and set to 0 Now working Thanks a lot for your kind support.
Servo working very fine with following code Conclusion : 1. Servo Motor is fine 2. Connection is Fine 3. Power for Servo also ok May be issue .1 GRBL command 2. UGS - Options 3. Current Settings Code: #include <Servo.h> Servo servo; int angle = 0; void setup() { servo.attach(11); servo.write(angle); } void loop() { // scan from 0 to 180 degrees for(angle = 0; angle < 80; angle++) { servo.write(angle); delay(15); } // now scan back from 180 to 0 degrees for(angle = 50; angle > 0; angle--) { servo.write(angle); delay(15); } }
Doesnt UGS or your gcode include a $32=1 somehow? (overwriting your settings back to laser mode) Use software.openbuilds.com instead
I have connected one servo motor with pwm pin (D11). I want to connect one more servo ..is it possible ? If yes which pin and how to control via gcode ?
All those questions are limited by Grbl's functionality, it has only one PWM output by default (stock grbl uses that pin for spindle and laser, cprezzi's fork uses it for servo pwm) - see gnea/grbl for details on how the available pins are used
