Hi All - I’ve just finished my MPCNC which was a fun build - thank you Ryan!
I’m have an intermittent fault though (about 95% of attempts to rung code will fail). Runs G-gode for a while, then might do a few random 100mm or so traverses in X or Y, occasionally gets back to running the code, but then ultimately then resets. It does this at different points when attempting to run Gcode (which looks good in code view). Same behavior on the site provided sample crown.gcode file.
I did not by parts from V1, but I’m running Ramps 1.4 from V1 download link. I modified the steps per mm in firmware on Arduino Mega clone since I have 20 tooth pulley (X, Y) and 16 micro steps on X,Y,Z (instead of 32 micro steps) since I have A4988 stepper drivers. Running from SD card on LCD 12864.
No end stops
Mac (for Fusion 360) but all attempts to route have been routing from SD Card.
Pictures attached of 4 attempts to run the same g-gode showing different cuts each time (inconsistent error points), and failure to complete without a reset.
Picture of my setup.
Things I have tried so far to resolve the errors;
A) Swapper power supply (tried a 12v 2A and 12v 5A)
B) Tried several G-Gode samples including crown from V1
C) Reformatted SD card and tried multiple (3) SD cards
D) Dissasembled Arduino / Ramps Shiled / Stepper drivers to look for damage, bent pins etc. All looks OK
E) Uploaded blink arduino sample to check flashing works, then reflashed with Ramps 1.4 firmware
F) Checked 12v supply with multimeter.
Any other suggestions for me to try for trouble shooting ? I was think about buying another Arduino Mega incase its damaged somehow, but thought I’d try here in case anyone else has already solved these symptoms. I could also swap out A4988 drivers as I have 2 un-used, but seems like a long shot…
Thanks for reading!