Bottom of parts chipping

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DanFecteau
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Bottom of parts chipping

Postby DanFecteau » Wed, Apr 08 2020, 9:15AM

Hello, any idea how to avoid that kind of chipping at the bottom of part at the point of entry ? See attach. Tool is a brand new 60-123mw.

DanFecteau
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Re: Bottom of parts chipping

Postby DanFecteau » Wed, Apr 08 2020, 9:18AM

My outline pre-ramp depth is at 0.25'' and my outline ramp in lenght is at 0.375'''.
Attachments
Chip.pdf
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Settings.pdf
(7.31 MiB) Downloaded 95 times

David Egnoski
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Re: Bottom of parts chipping

Postby David Egnoski » Wed, Apr 08 2020, 11:31AM

I've always used a 3" ramp. I might see a small chip if the part is hanging over the edge of the table, but rarely.
Dave Egnoski
Richmond Cabinet & Millwork

Clint Buechlein
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Re: Bottom of parts chipping

Postby Clint Buechlein » Wed, Apr 08 2020, 12:01PM

I'd guess that short ramp length is giving you some issues. Lengthen it out like Dave suggests and see what that does for you.

-Clint-

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Brad McIntosh
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Re: Bottom of parts chipping

Postby Brad McIntosh » Thu, Apr 16 2020, 8:34AM

Dan,

I agree that your OUTLINE RAMP-IN LENGTH is too short. It is causing your OUTLINE tool to PLUNGE very steeply (almost vertical) and it is punching through the melamine on the bottom side.

3" or so is normally a good setting for the OUTLINE RAMP-IN LENGTH.

NOTE: It is possible that someone confused the OUTLINE RAMP-IN LENGTH for the OUTLINE PRE-RAMP DEPTH. If you are using a 1/2" compression tool for your OUTLINE, then a OUTLINE PRE-RAMP DEPTH of 0.375" is normally suggested as it insures that the lower upshear part of the cutter is well into the material before the RAMP move starts. This reduces chipping on the top surface during the ramp.
Brad McIntosh
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