Machsupport Forum
Mach Discussion => FAQs => Topic started by: Sambonnie on September 19, 2011, 10:28:37 AM
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Hi guys, Tom here from sambonnie design.
We have purchased a rscnc twin head router.
We are a Kitchen (http://en.wikipedia.org/wiki/Vance_Miller) company and we are using the Cnc to cut all doors, panels and cupboards.
We use mdf for our doors and mfc ( chip board ) got the cupboards.
With your guys knowledge and experience with Cnc machines what cutters to use for both as I don't have the money to throw away on the trail and error route.
Kindest regards in advance
Tom @ sambonnie
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For flat parts, compression spirals are what you want. For maximum tool life, proper rpm and feedrates are required.
How much HP do your spindles have. Do you have a vacuum table? How big is the vacuum pump?
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There are two ac servo motors the big one is 4kw and the smaller is 3 kw. Yes vacuum table present works out on an 2440mm x 1220mm sheet there is 10 ton equivalent force holding it down. I have tried a 8mm spiral but wasn't impressed as the first cut into each panel would burn edge unless I cut in two passes.
Thanks for your reply :)
Regards Tom @ sambonnie
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I have tried a 8mm spiral but wasn't impressed as the first cut into each panel would burn edge
That's what I mean about proper rpm and feedrates. If you're burning, you're cutting much too slow, or your rpm is much too high.
I'd recommend something with a larger diameter, 10-12mm. We use a feedrate of 20 meters/min at 16,000 rpm. At lower feedrates, you'd need to reduce the rpm proportionally, but there will be a lower limit for the rpm.
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Ok I was running that at 7m/m at 18000 that would explaint that,
Is a spiral cutter both good for mdf and mfc ??
Regards Tom
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Yes, but I'd use different bits for each, as after cutting MDF, a bit will dull quicker on other materials. And be sure to use a Compression spiral.