Hello.
I was doing some test drilling on 6mm GR10-FR4 pcb material.
Everytime the Drill exits out the other side of the material the drill snaps.
Other wise i can drill many holes with not problems provided i don't drill through.
Anyone have any ideas?
Drill 1.15mm
Z feed 1mm/s
Peck depth 4mm
Regards
Bart
Drill bit snapping on on exit? GRRR!
Re: Drill bit snapping on on exit? GRRR!
Bart, Can you sandwich 3 at a time then don't drill all the way thru the bottom one? maybe just two layered up would work as well.Wemme wrote:Hello.
I was doing some test drilling on 6mm GR10-FR4 pcb material.
Everytime the Drill exits out the other side of the material the drill snaps.
Other wise i can drill many holes with not problems provided i don't drill through.
Anyone have any ideas?
Drill 1.15mm
Z feed 1mm/s
Peck depth 4mm
Regards
Bart
- Wemme
- Vectric Wizard
- Posts: 510
- Joined: Mon Jan 30, 2006 6:31 am
- Location: Christchurch, New Zealand
Re: Drill bit snapping on on exit? GRRR!
Hi Warren thats worth a go actually. abit of 1.6mm as a spoil board would be ok to do for this product.
I was wanting to get to the true reason for the snapping But that will get me going
Regards
Bart
I was wanting to get to the true reason for the snapping But that will get me going
Regards
Bart
CRFultz wrote:Wemme wrote:Bart, Can you sandwich 3 at a time then don't drill all the way thru the bottom one? maybe just two layered up would work as well.
Hi Bart
The point of the drill is the hardest part to push though any material. What I think is happening is you have a fair amount of feed pressure on the drill and the moment the point breaks though the pressure is gone.This in effect causes the bit to feed faster though the last part of the material. The result is a broken bit. You can try less feed and more pecks. Is your part flexing when you are drilling ?
Dan
The point of the drill is the hardest part to push though any material. What I think is happening is you have a fair amount of feed pressure on the drill and the moment the point breaks though the pressure is gone.This in effect causes the bit to feed faster though the last part of the material. The result is a broken bit. You can try less feed and more pecks. Is your part flexing when you are drilling ?
Dan
- Wemme
- Vectric Wizard
- Posts: 510
- Joined: Mon Jan 30, 2006 6:31 am
- Location: Christchurch, New Zealand
Hi Dan, cheers for the input.
I boughts some proper pcb drill bits 1/8 shank today and they worked a treat. a little over size
I suspect my problem was a combination of tool run out (joys of a quick release chuck) and previous tool geometry.
My feed speed was slower than normal and i was pecking so i don't think i have a problem with pressure.
There was no flexing of the material that i could see.
Regards
Bart
I boughts some proper pcb drill bits 1/8 shank today and they worked a treat. a little over size
I suspect my problem was a combination of tool run out (joys of a quick release chuck) and previous tool geometry.
My feed speed was slower than normal and i was pecking so i don't think i have a problem with pressure.
There was no flexing of the material that i could see.
Regards
Bart
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