Breaking Bits like Crazy . . . .
- avf925
- Posts: 37
- Joined: Fri Aug 26, 2016 4:12 am
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Breaking Bits like Crazy . . . .
Morning,
I am obviously doing something wrong in the setup process of these bits - and at $20.00 a bit - I'm pretty frustrated that I have destroyed 3 of them so far just yesterday and this morning. I am in one of the steps finishing a guitar fret board. The step is cutting the fret slots out along the fret board. The bit I am using is a .56 mm End Mill - the recommended width of the slot I am trying to cut. This bit was recommended by several other gents that CNC their fret boards. When I get to this step and load my file, the CNC spins up and basically SLAMS the bit into the rosewood, instead of a smooth gradual insert.
What am I doing wrong here guys?
I have attached the info shot from my VCarve Tool Database
Thanks for your help !
I am obviously doing something wrong in the setup process of these bits - and at $20.00 a bit - I'm pretty frustrated that I have destroyed 3 of them so far just yesterday and this morning. I am in one of the steps finishing a guitar fret board. The step is cutting the fret slots out along the fret board. The bit I am using is a .56 mm End Mill - the recommended width of the slot I am trying to cut. This bit was recommended by several other gents that CNC their fret boards. When I get to this step and load my file, the CNC spins up and basically SLAMS the bit into the rosewood, instead of a smooth gradual insert.
What am I doing wrong here guys?
I have attached the info shot from my VCarve Tool Database
Thanks for your help !
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- Vectric Wizard
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Re: Breaking Bits like Crazy . . . .
I am not familiar with the metric system but it looks to me like your depth of cut is almost twice the diameter of the bit. I would reduce the depth of cut and ramp in to the cut
Bob
Bob
- mezalick
- Vectric Wizard
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Re: Breaking Bits like Crazy . . . .
I'm assuming you're using the profile toolpath ???
If so, try adding a ramp to the vector you're cutting.
And cut slower...
Michael
If so, try adding a ramp to the vector you're cutting.
And cut slower...
Michael
Michael Mezalick
https://www.youtube.com/user/mezalick
mm@mezalick.com
https://www.youtube.com/user/mezalick
mm@mezalick.com
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- Vectric Craftsman
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Re: Breaking Bits like Crazy . . . .
You will need to do a conversion from inch to mm but these parameters worked quite well when I had to recreate an entire neck for an expensive vintage ES-335.
If you have any specific questions send me a pm.
Bill
If you have any specific questions send me a pm.
Bill
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- Vectric Wizard
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Re: Breaking Bits like Crazy . . . .
60mm/sec is about 140ipm.
I think you need to be in the 5-10ipm range.
I think you need to be in the 5-10ipm range.
Gerry - http://www.thecncwoodworker.com
- Leo
- Vectric Wizard
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Re: Breaking Bits like Crazy . . . .
I agree with GER21 - PLUS - you MUST reduce your pass depth to either 1/2 the end mill diameter or 1/4 the end mill diameter.
I would start at .15 mm pass depth and 5-10 mm/sec
I have cut corian with a 1mm mill, but you are using a mill almost half that diameter.
I would start at .15 mm pass depth and 5-10 mm/sec
I have cut corian with a 1mm mill, but you are using a mill almost half that diameter.
Imagine the Possibilities of a Creative mind, combined with the functionality of CNC
- dwilli9013
- Vectric Wizard
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Re: Breaking Bits like Crazy . . . .
Depth of cut should optimally only be half of bit diameter more so with the smaller diameter tools.
Your plunge rate is too aggresive for the size bit you are using. Cutting speed should also be taken down considerably.
Bills numbers are pretty dead on for the bit you are using. Just convert to metric and you are golden. Google is your friend on the conversion or Joshua Madisons convert software.
https://joshmadison.com/convert-for-windows/
Your plunge rate is too aggresive for the size bit you are using. Cutting speed should also be taken down considerably.
Bills numbers are pretty dead on for the bit you are using. Just convert to metric and you are golden. Google is your friend on the conversion or Joshua Madisons convert software.
https://joshmadison.com/convert-for-windows/
D-Dub
Dwayne
Dwilli
Dwayne
Dwilli
- avf925
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Re: Breaking Bits like Crazy . . . .
Thank you all - and Bill - I set it up like you have it laid out - cuts like butter - and the BIT LIVED
really appreciate all of you guys !
Couple things to share - since my Axiom and VCarve are setup in mm's - and I'm a MAC guy
This is an AWESOME conversion App for the MAC - and it's FREE
https://itunes.apple.com/us/app/convert ... 0061?mt=12
Attached are the converted settings in mm's
really appreciate all of you guys !
Couple things to share - since my Axiom and VCarve are setup in mm's - and I'm a MAC guy
This is an AWESOME conversion App for the MAC - and it's FREE
https://itunes.apple.com/us/app/convert ... 0061?mt=12
Attached are the converted settings in mm's
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- Vectric Craftsman
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Re: Breaking Bits like Crazy . . . .
Glad it worked for you. Is your fretboard bound or unbound and what radius will you use? The radius needs to be accounted for to enable the tang to seat all the way at the edges of the board.
Bill
Bill
- avf925
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Re: Breaking Bits like Crazy . . . .
It's unbound and a 10 -16 compound - it's for a Strat
- Adrian
- Vectric Archimage
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Re: Breaking Bits like Crazy . . . .
If you want to work in imperial units within VCarve and output in mm you can. There's no need to use the same units as your post processor/machine.
You can also do the direct calculations in VCarve as well so no need to use external calculators if you do want to convert from one unit to another within VCarve.
http://support.vectric.com/aspire-quest ... characters
You can also do the direct calculations in VCarve as well so no need to use external calculators if you do want to convert from one unit to another within VCarve.
http://support.vectric.com/aspire-quest ... characters