question-circle Question Z axis plunging too deep

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03 Nov 2020 17:04 #59758 by adrienne.smatt
Z axis plunging too deep was created by adrienne.smatt
First time poster.
I've had my Stepcraft 600 for about 4 years now and every time I go to use it something else goes wrong. When it is something physical, I can seem to figure it out and fix it, but this time it is a programming issue (I suspect anyway) and I really don't know what the problem is.

A couple weeks ago I got a new bit - a 3 wing heavy duty surfacing bit with carbide cutters. I drew up a surfacing code in fusion 360. Made sure to save everything in millimeters (because I've come across that problem before, stepcraft doesn't like inches) and then clicked over to uccnc to run the code. Well, now there's a 1" hole in the bed of my cnc because even though I had set the zero, it went crazy - dashed away from where I wanted it to cut and then plunged really deep.

I thought it was the new program I'd written up. So after walking away from the machine for a couple week (and with a deadline of this weekend for a market I'm trying to prep for) I've come back with fresh eyes. I decided to avoid the new program and the new bit for now, and run a code I know works. Except it has decided to plunge far too deep once again.
This program previously worked just fine. I don't know what the issue is now. the X & Y axis seem to run fine but the Z is plunging way too deep, threatening the bed of the cnc.
It is plunging too deep in the first few lines of the code - it should gradually step down. Again, I've previously used this code with no issues.

Does anyone have any suggestions? I'm running out of patience.

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03 Apr 2021 21:15 #60873 by elvira
Replied by elvira on topic Z axis plunging too deep
Did you solve this problem?

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24 Jul 2021 14:49 #61293 by antho8101
Replied by antho8101 on topic Z axis plunging too deep
Same problem. I am still looking for a solution to solve this big problem (I also made holes in my aluminum bed...)

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27 Jul 2021 09:15 #61301 by CNCMiller
Replied by CNCMiller on topic Z axis plunging too deep
What CNC control software you are using?
Is it Winpc-nc or UCCNC?

Possible solution is to reverse the Z height in the control program since you use G-code.
In Winpc-NC you can find that on: the tab "Parameters > Import Format" > DIN/ISO check 'invert Z coordinates'

SC 1/420 + Gantry extension, Kress 1050 FME-P, NeJe 20W Laser, WinPC-NC USB v4.00, Vectric Aspire 9, SolidWorks 2021

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27 Jul 2021 10:16 #61303 by elvira
Replied by elvira on topic Z axis plunging too deep
Yes, I solve this problem.
The usb contact was moved a little bit out.

Some connection are missing and everything goes wrong.

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01 Sep 2021 00:07 #61391 by CarsonLeh
Replied by CarsonLeh on topic Z axis plunging too deep
I'm having a similar issue with my OTK. Blade dives 3mm deeper on random lines in file even though the code is set correctly. Anyone have any suggestions?

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