Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: znipe on April 14, 2015, 02:14:12 PM

Title: axis move wrong in mach 3
Post by: znipe on April 14, 2015, 02:14:12 PM

Hi!

Im having trubble with axis moving wrong after tuning engines, im using mm and if i set motor steps per to 320 then if I make a move G0Y0.01 the axis in mach 3 say that it stands on 0.0094 but if i move 1mm it shows 1mm.
.250 .500 .750 and 1mm show right movement in mach3.

Just cant understand why. Anyone who can help?

Title: Re: axis move wrong in mach 3
Post by: znipe on April 14, 2015, 03:52:53 PM

If i change motor tuning(steps per) to 2000 as default its working as its suppose to in mach 3. but then the steps isnt right on my motors ofcourse.

Title: Re: axis move wrong in mach 3
Post by: TPS on April 15, 2015, 03:38:40 AM

Hi,

i think it is based on your step resolution (but dont know 100%)

320 steps per mm means a resolution of 0,003125mm

Mach can only do one step, so if i does one step more:

0,0094 + 0,003125 = 0,012525 or in the other way

a move of 0.01 would be 3.2 steps

0,250 would be 8 step's and so on.

Thomas

Title: Re: axis move wrong in mach 3
Post by: znipe on April 15, 2015, 08:12:30 AM

Thanks for answer!

Yes it seems that way, and mach 3 newer goes over the given coordinate always stops one step before if it's not exactly one step.