What board do you have and what printer do you have?

@@GregTheroneggythetech Geeetech wood-frame i3. GT2560A+ electronics. Different drivers, but Z1 and Z2 (in E2 socket) are A4988 temporarily. Marlin 2,1,2,2. For probing i have a 9g servo attached to the part cooling fan, which swings down a mouse button switch connected to Z-Min port. I was using M6 threaded rods for Z movement but now replaced them with precision T8x8 leadscrews. I think they may have revealed some misalignment from Geeetech's CAD errors in the frame design :D But i'm not actually hearing motor snapback? Also when the motors are off, Z1 slides down pretty aggressively, tilting the gantry. Which is why i chose to give it a second driver and automatic correction. Temporarily running Z at only 1mm/s. The motors get pretty toasty, but the drivers are cool, they've got a ton of airflow.

Ah it's working now and it the scale value doesn't seem to matter too much. I have set it to converge only to 0.1mm because i don't need the motors to be exactly tram, because nothing else on my printer is :D I basically beat and bent the mechanics into shape a little and then i had a bad feeling about one of the A4988 drivers because it would make the motor emit horrible noises whenever i would probe its VRef so i took both out and put in others that i know are good... they turned out substantially better too. I mean you don't expect an A4988 to sound nice exactly, but some are less horrible than others because of differences in decay tuning. I'm getting in another Trinamic in a few days and moving to a different mainboard as well, i basically found a bunch of unused pins and managed to solder to 5 pins 0.5mm pitch right next to each other and made it to a connector, secured everything with Kafuter silicone, now just need to wire them up to the StepStick sockets. I had already modified Marlin to be able to access these pins, pins which do not exist on an Arduino Mega so they weren't supported. I had already been using this trick on this mainboard for E motor to set it to SpreadCycle mode (turn off StealthChop) but i broke the connection recently. So when the new driver arrives and when i'm moved to GenL board, i will have a full compliment of Trinamic drivers on all motors which i can then also tune properly and tune out their quirks. It's an old V1 GenL that i got as a firmware development mule so i don't foul my printer, but the boards were always intended to swap places eventually. The GT2560A+ had a little combustion event as well, i had to rebuild a small chunk of it; bad solder joint from factory because they forgot thermal reliefs, but like the defect was SO well hidden i mean i have an eye for this sort of thing and there's no way i was able to spot it. Luckily Marlin's Thermal Runaway alerted me to the problem before it became a bigger combustion event. Trinamic can misbehave though this is why i fall back to a4988 for testing as well occasionally. Trinamic are actually internally microcontroller based and sometimes particularly on the 2208 and the 2225 that i have the micro can just lock up due to ROM firmware bugs :3 i think the 2209 and related ones are less buggy, all the newer ones.

Also how did you end up connecting the sdcard slot ?

So i ran all new wires from the board. I have klipper on it now and would consider a canbus board to simply the wires to 4

@@GregTheroneggythetechcan you make a guide on how to setup klipper and slicer settings with klipper firmware?

We will as soon as it has an actual release