[marianhall]

Hi, im new to this forum and have just installed mach 3 on my computer for my cnc step high z s720. previously i was using Win PCNC but decided to change to Mach 3 as i really liked the 3D display and the easy of control and use. i had some problems setting it up but eventually got it moving.

im still left with some problems though...
i decided to run some codes that i had previously used with PCNC using the same vice and exact location that i would have used before, but i noticed my starting origin was different to my previous origin (i had a hole drilled in the exact co-ordinates of 200,210) and when i moved the tool to that location with Mach 3, the tool was off, it seems near enough in the x axis but my y axis seems off by nearly a mm id say, i no this doesnt seem a lot in the grand scale of things, but the work i do is very precise and needs to be spot on every time.

what seems to be the problem and is there any way to fix it? please say i dont have to go back to using PCNC for this work?

Marian

[ger21]

Maybe adjust your steps/unit slightly?

[jimglass]

Go to "motor Tuning" and check your distance per step setting.

Jim

[Andre' B]

but i noticed my starting origin was different to my previous origin (i had a hole drilled in the exact co-ordinates of 200,210)

I am guessing you program you parts relative to the machine coordinate system home switches.
Do you know about work offsets, G54,G55, etc.?

On most controls G54 is active by default so all you may need to do is change the G54 offset values by however much you are off.

I am assuming you have the steps per unit set so that 100mm of commanded motion moves the tool 100mm on the machine.