How do I change tool mid cut and bitset without having to start all over again?
This should automatically happen with a BitSetter — basically the way it works is:
- have toolpaths which use different tool #s (should automatically happen w/ a .c2d file — if writing out .nc files from Carbide Create Pro used “Carbide 3D Shapeoko” under Edit | Select Post Processor)
- BitSetter is enabled and configured
The machine will:
- measure the initial tool when initializing
- user will set origin relative to the stock — the system will know what that offset length is for this Z-axis origin
- when loading a file and running it, the user will be prompted for the first tool — if need be change to the correct tool at this time — the system will measure it and adjust the offset length so that effective Z-axis zero will remain the same
- after cutting is finished with the first tool, the machine will pause and prompt for the next tool — load it and allow the machine to measure it
repeat that last step for each tool.
On the other hand, I read it that he needed to change the tool “midcut” as in the same file. For example, needing to replace a dull bit. If that’s the case, you can’t. You have to either start from the beginning, or edit your gcode file, which can be a pain in the arse.
Many thanks for your quick response.
My problem was I was cutting out a pocket which was taking a long time and my router was getting too close to the work, so I wanted to extend my tool so the router would not touch the work piece.
I tried pausing the job and I could change the tool but not re bitset. Stopping the program meant I would have to start again.
Not something which we support.
Quit, measure where the cut stopped at, source a longer tool, re-work the file so as to continue where it left off.
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Many thanks.
This is only my second job with my new CNC so still learning.
Reworking files half way or on the end becomes a standard flow (at least for me). I just cut a pocket and didn’t like the finish, and wanted it a little deeper. So, without moving my work, I created a second group in the file (disabling the first), offset the contour by 0.25mm (outward) and made it 2mm deeper. I started this at the bottom of the prior pocket. New pocket came out great.
If I want to redo this project I will need to reorder the toolpaths, but typically keep the workflow the same to get the same results.
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When inserting a bit it is only required to insert the bit as far as the collet is long. So if your collet is .75" long then insert the bit .75" at a minimum. The reason is to get the best grip on your tool. The collet is basically a W shape. The inside of your router shaft is an inclined plane getting smaller towards the top. So you insert your bit the minimum required and the collet nut presses on the bottom of the collet forcing it up the inclined plane and causing the collet to collapse and grip the bit.
If you have longer overall bits you can insert the bit further into the collet. However never bottom out the bit in the router shaft. The top of the router shaft is rough and when the collet is tightened it slightly moves the bit up to tighten it. I have several long bits and will insert it all the way up and then pull it down about 1/4".
If you dont insert the bit to the top of the collet the bit could lose grip with the collet and possible move during cutting and potentially ruin your cut.
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