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8th January 2012, 01:35 PM #1
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Hi from Warren in Melb, need HELP with routing issue.
Hi
Hoping someone here can help me with a CNC router issue. I have a home hobby router that I am using to cut out shapes and kids names for friends and family. My question is: The parts I cut out don't have a neat finish, they have burrs/splinters on the edge. The actual cut is smooth but the edges are not great, I can give them a light sand but I am trying to eliminate this. The back side of the pieces don't have a burr/splinters. I am cutting through the part onto another piece of timber.
Timber is 8mm pine, cutter is single flute 1/8" carbide taking two cuts, first cut at 4.5mm, second cut 4.0mm, spindle rpm 18000, feed rate 420mm/min.
If anyone can help it would be greatly appreciated.
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8th January 2012 01:35 PM # ADSGoogle Adsense Advertisement
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8th January 2012, 02:22 PM #2
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Have you tried backing it off for the first cut? like cutting only a mm or 2 in the first pass.
Also is it a straight bit or spiral? I've always found the spiral bits to leave burrs on wood.
I'm still fairly new myself to routing wood so maybe a few others may have some suggestions.
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8th January 2012, 03:10 PM #3
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I have tried backing it off for the first cut but still the same. The cutter I am using is spiraled.
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8th January 2012, 03:28 PM #4
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Yea I recon a straight bit will sort out your issue.
If your router can take a 1/4" shank bunnings sell the straight 1/8" cutters.
{EDIT}
Attached a picture of some pine I cut with a 1/4" 2-flute straight carbide cutter, the piece is 60x60x19mm.
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8th January 2012, 11:18 PM #5
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Agree that the straight cutting bits will not put stress on the upper cutting edge like the spiral does. Alternatively depending on the severity of the splintering, ensure that your router bit is also perfectly plum. Some miss alignment will stress the bits and cause some really bad splintering due to vibration.
Chris, almost looks like the upper body of a stepper motor.
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9th January 2012, 04:54 PM #6
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If its the top edge that's fraying why not try something like this?
Carba-Tec Spiral Downcut Bits : CARBA-TEC
Regards,
Rowan.
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9th January 2012, 04:58 PM #7
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It's for a project I'm working on, some back covers for the stepper motors to make my wiring a little cleaner.
Originally Posted by twistedfuse
Chris, almost looks like the upper body of a stepper motor.
https://www.woodworkforums.com/f170/chriss-extruded-router-124960/index6.html (Post 84)
Just doing the prototype in pine as its easy to machine and cheap.
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9th January 2012, 07:52 PM #8
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Chris,
Have you looked at vacuum forming? I have seen some very impressive results with polystyrene and a household vacuum cleaner.Cheers,
Rod
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