Melamine chipping
2/9/26
Have been running it for 2.5 years now, had it set up by Homag
On white 5/8 melamine (uniboard or panolam) i get occasional chipping, sometimes real bad chipping all along the edges
Have talked to my bit supplier, they've thrown any bit at me, and no improvement, they even went so far as to sent me a hydraulic toolholder which is supposed to minimize vibrations
Right now I'm running a 3/8" compression, with special coating, 3flute with 1/4" mortise tip.
Have also tried the equivalent without the coating
Bits are cool to touch right after cutting
Feed speed is 19 meters per minute
And 18000 rpm
Leaving a 1mm onion skin to cut for the second pass
Bit supplier is at a loss as to what to do next
When i put a new bit in then things inprove, but after 10-15 sheets its chipping again
I used 2flute bits in the past, but worse results.
Funny thing is that some pieces are quite fine, and others are very chipped, also my dados are chipped, but those are getting cut with a standard 3/8 downcut bit
Even on high quality textured melamine i get chipping but then only where the bit enters the material just one small chip(really annoying) but other than that good results
What would cause that initial chip???
Anyone that can help me out with this?
The chipping is only happening on the top normally
When it chips at the bottom it's generally due to a bowed sheet not touching the spoilboard properly or a dull bit tip.
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