Hello all,
The weirdest thing just happened to me. I’ve had my Primo build for about 18 months now, and it gets used a couple of times a month. Recently it has started to get used more. For the most part what we do is basic cutting of parts. As such, we don’t have a lot of tool changes. For the most part the 1/8" endmill does was we need.
Tonight I decided to try something different – essentially try to make a small series of bowl shaped indentations into the piece. This involved a tool change for a ball ended bit.
The first part of the cut went as expected. I jogged the toolhead to where I wanted to start from. I started the cut, and after Z was probed, it went for it and started cutting.
Then comes the tool change. I’ve got a Dewalt 660, so the tool change isn’t super easy, but after the endmill cooled down, I got the tool changed. I resumed, which reprobed Z, and resumed again. The tool started and went to move to position.
As I was watching, something seemed off, the position wasn’t where it was supposed to be. Watching it for a few minutes longer, I could see that the 2 X stepper motors were turning in opposite directions. Not cool.
What’s really weird is why this happened after the tool change. And now it is persisting after a reboot.
Anyone have any thoughs?
I have a Primo with dual stepper motors on X and Y, powered by an SKR Turbo 1.4 with TMC2209 drivers, if any of that matters.
And here is the tool change GCode I have in Estlcam:
G0 Z35 F500 ; Raise Z axis 35mm
M107 ; PID, Stop spindle
M00 ; Wait for LCD button press
;Change tool: <n>
G28 Z ; Home Z w/ Z-probe
G92 Z0.5 ; Account for probe thickness (set your thickness)
G00 Z5.0000 F500 ; Raise Z probe off off of surface
M00 ; pause for LCD button press
;M03 S<s> ; PID, set spindle speed
M106 ; Start spindle
Could this be a bad stepper motor that is just wreaking havoc?