Tool length compensation

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calica
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Tool length compensation

Post by calica » Fri Jan 25, 2013 7:55 am

Has anyone bothered? Or do you just rehome Z between tool changes? Just want to know best practices before trying a multi cutter job.

PsyKo
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Re: Tool length compensation

Post by PsyKo » Fri Jan 25, 2013 8:17 am

Hello,

I've never done any tool change yet ( except for PCB milling) mainly because I don't have any reliable homing system right now.
If you know the length of your tool and if you're sure they are always tighten in your tool the same way (same depth) you can configure them in your CAM software.
Otherwise, I think you will have to rehome the Z axis. That's what I've done with PCB drilling.
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Improbable Construct
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Re: Tool length compensation

Post by Improbable Construct » Fri Jan 25, 2013 4:10 pm

I re-zero the Z-axis after each tool change. If I am running a job that will remove my X0,Y0 location I start out by picking a Z0 that is outside the cutting area or on a piece of scrap that is the same thickness.
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calica
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Re: Tool length compensation

Post by calica » Sun Jan 27, 2013 8:33 am

Thanks. I have a z homing plate so that is probably easiest.

scott216
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Re: Tool length compensation

Post by scott216 » Sat May 24, 2014 12:34 pm

Can you use a Z homing plate with tiny PCB end mills like 0.3mm diameter or will they break during the touching process?
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cvoinescu
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Re: Tool length compensation

Post by cvoinescu » Sat May 24, 2014 12:38 pm

scott216 wrote:Can you use a Z homing plate with tiny PCB end mills like 0.3mm diameter or will they break during the touching process?
Yes, if the plate is spring-loaded, or made of a soft metal (copper) and you move really really slowly.
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DanMc
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Re: Tool length compensation

Post by DanMc » Sat May 24, 2014 1:36 pm

I would stay away from tool length compensation. It's more meant for machines with automatic tool changers or different mounting systems where the collet is semi-permanently attached to the tool. Simply inserting bits into a collet leaves too much room for error.

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