Hello i am completely new to this game and to be honest struggling. I have built an Open Builds Mini Mill. I am trying to calibrate the axis movement in mm. Units selected are mm. I have gone into 'settings' in Mach3 and selected 'Set steps per unit' i have selected the appropriate axis and set movement to 1mm. The axis moves 40mm !!!!! What am I doing wrong? Any help would be greatly appreciated Thanks Dave Higginbottom
or @ mach configure >motors set Set steps per unit 1/4 from what you have now. here 1/32 = 791 Set steps per unit 1/64= 1582 Set steps per unit
Is that with a TR8*8 screw? With a TR8*8 the lead is 8mm (8mm travel per turn) at no micro-step it would be 200/8 = 25 steps per inch 1/4 = 100 1/8 = 200 ( just like Martin's example in the video) Cheers Gary
no, that is with a 1/6 trunnion think starting with 200 & then tweaking would do the job don't forget to close Mach & your controller after changes.(can help) i just check it again: set to 792 @ 1/32 comes pretty close (c-beam xl) @ 1/8 = 198 Cheers+good luck,
and GRBL settings calculator for the basic numbers, then use the video procedure to fine tune. oh i know it says grbl but the calculation of steps/mm is the same!
good one David, has everything. LOL never looked to the steps per revolution of my steppers soooo NOOB
technically you don't need to know (but it does help). most steppers are 200steps/rev, so if you calculate using that and it goes half the expected distance, then you know it is a 400 step per rev motor (which tend to be used in laser cutters, maybe they vibrate less?). but you can start with everything unknown and just set the steps/mm to '1' .... your first calibration attempt will not move far but will get you in the ballpark and then you will need to do it again 2 or 3 times to narrow it down to something useful.
