I'm a bit confused with this toolpath...

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NewAtThis
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I'm a bit confused with this toolpath...

Post by NewAtThis »

I've got a piece of timber 320mmx200mm I want to flatten with a 1+1/8" Amana 45525 surfacing bit, so have over-wrapped the pocket on the Y axis, shown below:
Screenshot 2022-06-09 at 13.35.01.png
When I preview the toolpath, it looks like this:
Screenshot 2022-06-09 at 13.33.34.png
But when I run the toolpath, it doesn't cut to the edge, even though I've extended the pocket.

Can someone tell my why, please?

File and toolpath (appended as a txt file) attached...
Attachments
Flattening - Temp.crv
(30.5 KiB) Downloaded 60 times
Flattening - Tempgcode.txt
(797 Bytes) Downloaded 51 times
Be wary of taking the advice of someone who thinks he knows what he's doing, and don't listen to me!

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Adrian
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Re: I'm a bit confused with this toolpath...

Post by Adrian »

Your vector (310x220) is smaller than the area (320x200) you're trying to cut. The vector needs to be the diameter of the tool plus the material size at a minimum.

Make the vector the correct size and then adjust the options from there to get what you want. If you run the preview you can clearly see the material it is leaving.

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adze_cnc
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Re: I'm a bit confused with this toolpath...

Post by adze_cnc »

Adrian is partially correct. Your X-length (310mm) is less than your object (320mm). But your Y-width (220) is larger than your object (200mm). The problem is that the 20mm extra it is not enough larger.

Your cutter has a diameter of 28.575mm (let's call it 30mm for nice round measurements). You'd need to make the rectangle at least 350mm x 230mm to ensure full coverage by that bit (OK, 348.575mm x 228.575mm but let's quibble over a millimetre or so)).
 
Rectangle larger X & Y by bit size (~30mm)
Rectangle larger X & Y by bit size (~30mm)
 
Full coverage
Full coverage

NewAtThis
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Re: I'm a bit confused with this toolpath...

Post by NewAtThis »

Thanks, guys. All sorted now :D :D
Be wary of taking the advice of someone who thinks he knows what he's doing, and don't listen to me!

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