Losing steps - Not the normal problem.

[kimfmx]

Hi,

I have a problem that is driving me crazy!!!!

Ok it started when i was milling a series of letters with a v-tool, and i notised that the letters were gradually getting deeper and deeper, first thought the land had shifted so i regrounded it, but the problem was still there... so i made a copy of the G-Code, and isolated one letter, and copied it after eachother so it effectively made a "A" over and over again at the same place, and yes it did very slowly but surely go deeper and deeper every time it made the letter. even if i with all my power tried to pull the z-Axis upwards while it was making the letter i still see the problem.... I do NOT believe its loosing steps mechanically.. i have been running this machine for a long time without problems, and even at half motor current, now I have ramped everything up to max, and i still see the problem...


So the sympton is directly visible as when.
Zero the tool at top of material.
Run multible "A" letters over and over again.. and place the tool at top of part again, now Mach3 says its 2 mm above the part!!!

I made a simple G-Code program that just simply excersized the Z-Axis up and down fast for a long time, and that worked flawlessly...

Im running out of options on this. but is thinking if ther could be something with rounding up or down.. I dont know.

Im using Mach3 to drive the motors, and i do not believe mach3 is causing problems.. or...

Any help is much appriciated...

Best Regards
Kim Mortensen

[will gilmore]

tool slipping in the tool holder?