The Shop > CNC
CNC Maintenance Engineer required to service my home machine
awemawson:
Glad your'e sorted Jane - if anyone can John S can :thumbup:
How about starting an introduction thread in the relevant section of the forum to tell us a little of what you are doing (or going to do ?) with your CNC machine.
BTW we like pictures here :worthless:
Jane:
Will do, once I get something that vaguely resembles anything but lines :palm:
It starts off drilling at the correct depth but then seems to gradually work its way up the z axis, even though the mach software is still in the negative range. Must be some settings somewhere, just trying to figure out what they would be.
DICKEYBIRD:
Sounds like you're losing steps on the Z-axis. Try slowing down the feed rate in your G-code or slowing down the stepper motor Velocity in the Config>Motor Tuning setup screen. Just click on the Z Axis button on the right side of the box then drag down the Velocity slider to about half of where it was, click"Save Axis Settings" then OK & try your code again. If it then behaves OK, try tweaking the Velocity up a little bit at a time 'til it starts skipping & back off a bit from there.
Drilling's hard work & if the machine is a bit weak, the drill dull/too big or the plunge (feed) rate too fast it'll just stall or skip steps. The DRO keeps merrily rolling along & the motor just misses a few (or a lot) of steps. When it goes back to zero when it's finished, lord knows where it'll be.
Keep trying, you'll get it! :beer:
Jane:
Thank you so much :)
I tried adjusting all velocity settings, feed rate and acceleration but it just didn't seem to have any affect (though that's not to say it's taught me a great lesson in what they should be set).
John (my CNC knight in shining armour) came to my rescue and spotted that it was the 'low active' setting within the config, basically they were ticked and shouldn't have been... no more partial lines for me!
Thank you guys so much... saviours of my sanity!
awemawson:
:mmr:
Excellent :thumbup:
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