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Old Oct 19, 2010, 06:35 AM
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ALEX HEWSON's Avatar
Christchurch, New Zealand
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Milling Depron

Hi All,

Has anyone done a "How-to" yet on this? Or anyone given any info in other threads?

Am wanting to try milling my next indoor design, but not sure how to hold it or what cutters to use. Have a 1000x400mm table CNC router machine to use.

Would appreciate any assistance
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Old Oct 19, 2010, 01:52 PM
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United States, NM, Albuquerque
Joined May 2004
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I use a home built vacuum table on mine, Works great. No option is better IMO for doing depron. Most wood bits work pretty good on depron, its a bit of a personal preference/trial and error to find what works for you and the spindle speed's your machine runs.

Chris
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Old Oct 19, 2010, 05:04 PM
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Sweden
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Maybe some pictures will explain how I do. No fancy stuff. But it would be nice to have a CNC router.
/Lennart
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Old Oct 20, 2010, 07:37 AM
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I have build a vacuum table for my DIY CNC router for milling Depron. Please find pictures and dxf drawings here: http://www.cnc4rc.com/forum/index.php?topic=6.0
I am using vacuum cleaner as a vacuum pump.

Normal HSS endmills works also great for depron. I am using 6 mm endmill for milling pockets and 2 mm endmill for cutting.
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Old Oct 21, 2010, 08:08 AM
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ALEX HEWSON's Avatar
Christchurch, New Zealand
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Thanks for all the great info guys. I might try both ways, making a vacuume table and also the hand held guide method.

But don't stop with the ideas...
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Old Oct 22, 2010, 09:32 AM
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Kimmo Kaukoranta's Avatar
Tampere, Finland
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You could use Your CNC router to cut some milling templates. Then use these templates to mill the depron manually. You just need to add a copy ring to the dremel attachement. I have a friend with a CNC router, but no vacuum table, so this is how we do ours.
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Old Oct 24, 2010, 07:33 PM
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SF Bay Area
Joined Oct 2004
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Alex,

If you're interested in the manual method, Matchless posted a great "how to" thread over on FG. Jeremy shows you how to make both the Dremel attachment and the routing stencils.
http://www.flyinggiants.com/forums/s...ad.php?t=21913

It looks like this. I followed his example, but haven't actually milled an airframe yet. Maybe soon...

--
Larry
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Old Oct 25, 2010, 11:20 AM
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I found a couple of pictures to explain my previous post. The first one shows the CNC cut milling templates and the second one some milled parts. The templates in the photo are actually for a different plane than the parts in the other picture, but You get the idea.

The dremel attachement I'm using is exactly like in Larry's photos, and described in the FG thread.
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Old Oct 25, 2010, 12:00 PM
Janne Lappi, F3A Team Finland
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Helsinki, Finland
Joined Sep 2008
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I used the same templates than Kimmo and I can say it is a very convenient way to do the millings. The job will be done almost during one snap roll Our templates was made from harboard and it worked well.

But you should notice one thing. If you use dremel with a ring in the center of PC board as shown on the photos above, you have to make the slots on the templates "too big". Because there is a bit "dead band" when engraving along the edge of the template.

Janne Lappi
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Old Oct 25, 2010, 02:56 PM
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Quote:
Originally Posted by JanneL View Post
you have to make the slots on the templates "too big". Because there is a bit "dead band" when engraving along the edge of the template.

Janne Lappi
Very true, and to be honest the effort needed to make a template is not really worth it unless you have access to CNC machinery. However, something that would be worth it would be to make a 90/45/45 triangle and a 90/60/30 triangle and then place these as appropriate to mill your models. Yes, it would take a little extra time positioning them and making sure you didn't overdo the milling, but they could be used on any model instead of having to make a bespoke template for each new model you design.

Mike
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Old Nov 01, 2010, 05:40 AM
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ALEX HEWSON's Avatar
Christchurch, New Zealand
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Quote:
Originally Posted by airportdog View Post
Alex,

If you're interested in the manual method, Matchless posted a great "how to" thread over on FG. Jeremy shows you how to make both the Dremel attachment and the routing stencils.
http://www.flyinggiants.com/forums/s...ad.php?t=21913

It looks like this. I followed his example, but haven't actually milled an airframe yet. Maybe soon...

--
Larry
Cheers for the link. Will have a go at a few ideas and see what wors best.

Made a makeshift holder for the dremel tonight at work. Should work alright as it seems weighted and balanced well enough.

May grind an old 6mm HSS cutter down to fit in the 1/8 collet
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Old Nov 01, 2010, 05:43 AM
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The templates I feel are a must for me to try. Will get some 3mm Custom board tomorrow to use for them
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