Help Need With Small Circles Profile Path
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- Posts: 6
- Joined: Mon May 10, 2021 3:54 pm
- Model of CNC Machine: Ooznest Workbee 1000 X 1000 mm
Help Need With Small Circles Profile Path
As an absolute beginner to CNC routing, I am in the process of creating some round holes for insert nuts in my wasteboard. I am using a Makita RT0700 router in a Workbee machine and, at lack of a better option, I am using a Whiteside 6.35 mm shank, 1 flute, double compression bit. To save the tool, I setup the toolpath for the holes in Cut2D as a profile path with a spiral ramp, in a 19mm MDF board. The toolpath is thus creating a cylinder shaped pocket about 10mm in diameter and 19mm in depth. My issue is the sides of these cylinder shaped holes are not coming out smooth but they have a partial ridge. I suspect this has to do with the start point and the spiral ramp setting... perhaps the plunge rate is too high? How can I correct this issue so that no ridge appears? Any help appreciated since as an absolute beginner I have no idea where to start troubleshooting the issue. These are my current settings for the mentioned toolpath: Start Depth: 0 mm, Cut Depth 20 mm, Spindle Speed: 12000 rpm, Feed Rate: 1900 mm/min, Plunge Rate: 250 mm/min. Thanks.
- Adrian
- Vectric Archimage
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- Joined: Thu Nov 23, 2006 2:19 pm
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- Location: Surrey, UK
Re: Help Need With Small Circles Profile Path
The ridge will be caused by deflection as the side load increases on the bit. That will be either deflection of the bit itself and/or deflection caused by flex in the machine.
I don't know about the speeds for your machine but the plunge rate especially seems very slow to me. Too slow a feed rate can often be as bad as too fast.
I don't know about the speeds for your machine but the plunge rate especially seems very slow to me. Too slow a feed rate can often be as bad as too fast.
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- Posts: 6
- Joined: Mon May 10, 2021 3:54 pm
- Model of CNC Machine: Ooznest Workbee 1000 X 1000 mm
Re: Help Need With Small Circles Profile Path
After changing some settings (Smooth Ramp instead of Spiral Ramp, Cut Depth now in 4 passes and Plunge Rate 350 mm/min) it seems the issue is mostly gone.
- adze_cnc
- Vectric Wizard
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Re: Help Need With Small Circles Profile Path
You might have tried to alter one thing at a time. Now you don’t really know which of those three changes contributed to fixing things.
I expect that smooth ramp instead of spiral to not help much.
I expect that smooth ramp instead of spiral to not help much.