Very good. I thought this was a step up in precision, which confused me for a bit. Is this a change in the Marlin config file? Will there be a noticeable change in resolution?
Good looking out. The kids and I built it, and we design projects for it, but it is not something we should have on campus as-is. Right now it lives in my laundry room.
Hmmm, changed the Feedrate and Cutrate variables, but it is missing plunge speeds and arcs. Once you get through this project you really need to get to Estlcam or Fusion the PPās are much more mature. Kinda surprised this works, there were multiple rates on the same line that I had warned them about, they left them in. I just took them out.
Not sure why the Feedrate isnāt repeating but maybe this will work.
You do not have the option to set the feed rate, cut rate, plunge, or rapid?
So remove two jumpers. Just under the Z axis. Then change the steps_per_mm for Z to be half what it was. You can change it in the config (itās an obvious name STEPS_PER_SOMETHING), or using gcode:
If you screw it up, youāll be off by a factor of 2, 4, 8 so it will be a quick test to see if itās working.
Thereās been some debate about which microstepping to use. The tile of thumb I use is just to use 1/32 on an MPCNC, unless you have a reason not to. They are practically identical, but the common assumption on the forums is that youāve got it in 1/32. You wonāt actually lose any resolution because the steppers canāt really do a 1/32 step.
Ha! Yeah, I was in over my head quickly with that one.
Digging a bit deeper, this software is bundled with nearly 500(!) post-processors of every flavor. I picked one (X-carve) and copied a chunk below. Not a lot there. If you know a machine that might operate in a similar way, I could send that PP to copy from.
Sweet, once you confirm I can add this to the ātrustedā PP list. Thanks for going through all of this and testing. I might still do some tweaking as I donāt like that there is a hard coded speed in there but I am not sure how the speed settings work. Has that cutting parameters window changed to include rapids or is it the same as before?
New snagāthe x axis stepper socket isnāt responding. I switched the x & y motors (fine) and the x & y stepper drivers (fine), but I only get an idle hum from whatever is plugged into the x axis socket when I send a command. I ran it fine this morning (10 min) to complete a section, set up for a new print, and it no longer moved.
The heat sinks seem very warm, but I donāt handle the board so I canāt compare with normal.
I have never had a board go bad after the fact, only a driver. You are describing a board issue 100%. Is there any sort of debris on the board that could be shorting it, or sitting on anything conductive? You can split the ramps and Arduino to check for anything that looks fishy. This is not a common occurrence, as far as I know the first we have seen here.
Nothing on the boards, and it sits on wood. I checked the sockets as best I could, and flashed back to the previous firmware just to make sure.
So, I tracked down the pin assignments in the firmware and flipped the X and E0 pins, and it works! Is it really that simple? I worry Iām overlooking something in my ignorance.