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Old 07-04-2017, 02:08 AM   #1
doyenofcastle
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Cutting Epoxy track parameter

Hi
Anyone know what best feed rate and spindle speed to cut graphite epoxy track?also for padauk wood ?

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Old 07-05-2017, 03:15 AM   #2
doyenofcastle
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Re: Cutting Epoxy track parameter

got that PDF in internet I ll try next week
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Old 07-05-2017, 08:43 AM   #3
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Re: Cutting Epoxy track parameter

I'm not sure the PDF shown will help all that much. I think it refers to pure graphite, which would have very different machining characteristics than a graphite/ epoxy track, which is mostly epoxy resin. I think a "machining epoxy resin" tutorial would be closer to what you are looking for. I don't machine epoxy tracks, so I can't help much with specifics, but I'd start with a spindle speed of about 2000 rpm and a slow travel speed, then go from there. You can probably go higher on the spindle speed, but I'd keep the travel speed slow. I've found that with plastics the bit tries to pull and deform the plastic. Granted, this is a brittle resin, not a deformable plastic, but it still won't machine like metal.
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Old 07-05-2017, 09:20 AM   #4
doyenofcastle
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Re: Cutting Epoxy track parameter

Actually CNC parameter is RPM 15000 feedrate 1.6 inch per sec
1/16 each depth
I have tried router with high speed epoxy cut and leave very rough surface with irregular grooves teak cost me a lot

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Old 07-05-2017, 10:05 AM   #5
doyenofcastle
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Re: Cutting Epoxy track parameter

It lay down for a year and need to finish it

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Old 07-05-2017, 01:24 PM   #6
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Re: Cutting Epoxy track parameter

I never pay all that much attention to RPM unless I'm using a huge bit. I keep my Festool Router at 6 or 7 (I believe this is 6000-7000 RPM) and take many shallow passes at a reasonably fast feed rate.

I have noticed that the biggest issue in routing cleanly through epoxy (or exotic or figured hardwoods) is the sharpness and quality of the router bit.

The second biggest cause of failure is if there is a less than perfect guide. I make sure the edges I am using for my router guides are perfectly straight and sanded to 360 grit so the guides glide smoothly along when making precise router passes. Any vibration or wiggle can cause irregularities and tear out.

Lastly, I use a traditional router with edge guides instead of a router table. This allows me to watch what I'm doing and gives me the option to abort a cut if something isn't going right (it's much easier to fix a small divot then a long shitty cut)
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Old 07-05-2017, 01:36 PM   #7
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Re: Cutting Epoxy track parameter

Quote:
Originally Posted by doyenofcastle View Post
Actually CNC parameter is RPM 15000 feedrate 1.6 inch per sec
1/16 each depth
I have tried router with high speed epoxy cut and leave very rough surface with irregular grooves teak cost me a lot

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I was thinking of a conventional mill, not a CNC machine. The 15000 rpm is around the same as a router, but the travel speed seems crazy fast. If I were using a router at 15000 rpm, my travel speed would be a lot slower than that. What material were you referring to with the 15000 rpm and 1.6"/sec travel speed. I was also thinking you were doing an enclosed track, where you would have to do it in one pass.
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Old 07-05-2017, 02:25 PM   #8
doyenofcastle
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Re: Cutting Epoxy track parameter

Yes what i did aluminium 3 time epoxy resin hardness just multiply paramter by 2.5 dont know its accurate but i ll use 6mm round to remove majority of area first

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Old 10-06-2017, 05:02 PM   #9
doyenofcastle
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Re: Cutting Epoxy track parameter

Just cut it with low speed
6 mm round nose then 8 mm ball
Track Depth 7mm
I dont like finishing this gun by epoxy i ll try teak oil

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Old 04-04-2018, 08:02 AM   #10
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Re: Cutting Epoxy track parameter

Just finish 1st teak oil longlow
How many I need to add ?very thin that longlow teak oil
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Old 04-30-2018, 01:03 AM   #11
doyenofcastle
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Re: Cutting Epoxy track parameter

Shooting good
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