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Author Topic: Noobie question regarding cutters.  (Read 3406 times)

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Noobie question regarding cutters.
« on: September 19, 2011, 10:28:37 AM »
Hi guys, Tom here from sambonnie design.

We have purchased a rscnc twin head router.

We are a Kitchen 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

Offline ger21

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Re: Noobie question regarding cutters.
« Reply #1 on: September 19, 2011, 05:16:19 PM »
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?
Gerry

2010 Screenset
http://www.thecncwoodworker.com/2010.html

JointCAM Dovetail and Box Joint software
http://www.g-forcecnc.com/jointcam.html
Re: Noobie question regarding cutters.
« Reply #2 on: September 19, 2011, 05:30:17 PM »
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

Offline ger21

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Re: Noobie question regarding cutters.
« Reply #3 on: September 19, 2011, 06:01:08 PM »
Quote
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.
Gerry

2010 Screenset
http://www.thecncwoodworker.com/2010.html

JointCAM Dovetail and Box Joint software
http://www.g-forcecnc.com/jointcam.html
Re: Noobie question regarding cutters.
« Reply #4 on: September 19, 2011, 06:23:46 PM »
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

Offline ger21

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Re: Noobie question regarding cutters.
« Reply #5 on: September 19, 2011, 07:46:35 PM »
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.
Gerry

2010 Screenset
http://www.thecncwoodworker.com/2010.html

JointCAM Dovetail and Box Joint software
http://www.g-forcecnc.com/jointcam.html