- Material tolerance variation in thickness and how to overcome...
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Material tolerance variation in thickness and how to overcome...
Hey folks - this is driving me to distraction so hopefully someone can help out.
I'm trying to 'photo engrave' a piece of granite. The main issue is that it requires a very shallow cut - say 0.1mm or less. If there's variance of 0.5-1mm over the entire piece there's some obvious problems arising.
There's a few simple - and some quite old - machines that seem to handle this with no problems. Two machines are a GALEKS and GRANITOGRAV - the ones with the angled Z axis. I'm guessing that the angle just makes it a cheaper machine to make as there's no z screw involved.
The Z zero of these machines is set at 1mm. They have a tolerance of 1 to 2 mm in machining depth.
So - two questions I suppose...
1. How do I overcome the tolerance issue?
2. How do the angled Zaxis machine get such good results?
Cheers.
Paolo
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Last edited by paolo6969; 01-31-2018 at 04:48 PM.
Reason: edit
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Re: Variation in material thickness and how to overcome...
Do a search for "auto leveling" and see if the same tricks used for cutting PCB boards would help in your case. It starts with a surface map generated by a touch probe.
Here is an example http://www.cnczone.com/forums/linuxc...are-forum.html
Steve
Last edited by steve323; 01-31-2018 at 03:19 PM.
Reason: cleaned up double posted text
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Re: Variation in material thickness and how to overcome...
That does look interesting but will have to file it in the library for later.
I'm using a Roland/Techsoft machine so kind of locked into the proprietary control software - no Gcode or Mach3 for me
- Material tolerance variation in thickness and how to overcome...
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