V bit setup

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V bit setup

Postby monlover » Thu Aug 15, 2019 5:06 am

Hi,
this is a very soft wood, Masonite 3/16 thick and the drawing will be using Vbit 90 Deg and depth will be almost 1/16
but I guess the 15000 rpm is too much.
please take a look at the setup and advice.
Thank you. :D
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monlover
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Re: V bit setup

Postby Rcnewcomb » Thu Aug 15, 2019 6:05 am

I know 700 IPM would be way too fast for my machine. Start at 60 IPM, then 120, then 180, etc.

I tend to set my plunge rate thee same as my feed rate.
- Randall Newcomb
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Re: V bit setup

Postby martin54 » Thu Aug 15, 2019 4:27 pm

One important bit of info you left out is the size of your project, from your profile your stock could be 4 foot wide BUT it could also be 4 inches wide :lol: :lol:
regardless though that is quite a complex carve & slowing the feedrate down will make a big difference. Slow the speed accordingly & start low as has been suggested.
A coat of sanding sealer an also help with chip out, if your carving 1/16" deep then it might be worth thinning the sanding sealer down so it penetrates deeper into the wood. This can help hold the fibres together & prevent chip out
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Re: V bit setup

Postby dealguy11 » Thu Aug 15, 2019 4:45 pm

While your Omnitech can certainly drive this bit at 700 ipm, you most likely won't be able to achieve those speeds because of the many starts and stops. 15,000 RPM may even be a bit slow if it actually achieved 700 ipm. My machine is similar to yours (same manufacturer, just re-badged) and I normally run this bit around 250-300 ipm with spindle speed around 12,000 rpm in MDF, which is simlar hardness. Set your z-feedrate to a similar number. Remember that the sharp tip of the bit is actually moving pretty slowly compared to the wings, so don't overburden it.
Steve Godding
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