Topics created by Ozzzzzzy

@Ozzzzzzy Most of my printing is of gcode that I construct with my own custom code generating software. Hand-coded, if you like.

I used to use arcs extensively when my Duet-equipped Voron was my primary production printer, but I bought a Prusa MK4 and found to my horror that the firmware at that time did not properly support arcs! I changed all of my code to eliminate arcs. Finally, a long time after my prompting* Prusa added arc support to the firmware but my experiments suggested that arcs caused gave stuttering movements with blobs and zits and so I did not go back to arcs.

*I suspect that my questions and complaints did nothing to accelerate the incorporation of arcs into the firmware, as it was when PrusaSlicer integrated an ArcWelder-like feature that it was done.

For your purposes I don't think you would need to disable mesh compensation. You just want to move it out of the way, so it's not accuracy critical.

@Ozzzzzzy said in C coupler direction.:

do i put an M913 after the M906 in the config.
Is there another way to reverse the motor.

You can swap rotation direction by either swapping the phases at the pins, or specifying the direction with M569 S in config.g

M913 is a modifier for M906, so M906 must come first in config. M913 would usually be used in a macro to scale the current to a percentage of M906

https://duet3d.dozuki.com/Wiki/Gcode#Section_M906_Set_motor_currents
https://duet3d.dozuki.com/Wiki/Gcode#Section_M913_Set_motor_percentage_of_normal_current

Using 2208 with the Duet 2 Wifi? You'll need to set it up as a dumb driver then (as mentioned here)

ref https://www.trinamic.com/fileadmin/assets/Products/Eval_Drawings/SilentStepStick-TMC2208_v11.pdf for how to set the MS1, MS2 pins as well as the solder jumpers J1 and J2 and cross refrence with the boards in question.

I have it working really good. I just know that my distances to the lead screws are just a close reference and I think that's where the small error comes in when doing a G32. I think there is a formula that will figure out what the true distance is, It might only have to run g32 once. Maybe save the new distances in the pid folder(M501) I love the way it is now. It might be easier to set one lead screw as a pivot point (dual independent) instead of X0 or Y0 if a formula would work.

@ozzzzzzy Got it. ✌ Thanks for your explanation 🙂

Once you're up and running you can compare the two. Print the same gcode. Once with 16 and again at 32. Run M122 after each to see if there are hiccups. See if you can tell the difference. Repeat for higher microsteps if you want to see how far it will go. Choose the one that best suits your needs.