Re: PDP 8 panels. Feedback

2015-10-27 Thread steven
> On 10/26/2015 08:54 PM, wulfman wrote: >> To effectively drill in plastics you need to run the drill press on >> the highest speed you can and use a freshly sharpened drill bit. > > If this is Perspex/Plexiglas, I've had great results with a good sharp > Forstner bit in my drill press at medium

Re: PDP 8 panels. Feedback

2015-10-27 Thread Nigel Williams
> On 27 Oct 2015, at 5:59 PM, ste...@malikoff.com wrote: > And my advice, sadly learnt and forgotten quite a few times, always after > drilling a critical part: > > CLAMP THE JOB DOWN! +1 on Steven's advice, having learned this lesson the hard-way.

Re: PDP 8 panels. Feedback

2015-10-27 Thread rod
Hi Yes clamp it down. I have a pillar drill and that has a table that the workpiece can be clamped to. This means they are at right angles to each other. So the drill bit works as designed. Sharpen or replace drill bits if they get worn. Next start small and work up in drill size. There are

RE: PDP 8 panels. Feedback

2015-10-27 Thread tony duell
> > And my advice, sadly learnt and forgotten quite a few times, always after > > drilling a critical part: > > > > CLAMP THE JOB DOWN! > +1 on Steven's advice, having learned this lesson the hard-way. I'll second (third? nth?) that! I was once told that the majority

Re: PDP 8 panels. Feedback

2015-10-27 Thread William Donzelli
There are special bits for plastics, and they work quite well. Regular bits are troublesome on most plastics. -- Will On Tue, Oct 27, 2015 at 12:38 AM, Chuck Guzis wrote: > On 10/26/2015 08:54 PM, wulfman wrote: >> >> To effectively drill in plastics you need to run the drill

Re: PDP 8 panels. Feedback

2015-10-27 Thread Jon Elson
On 10/26/2015 11:38 PM, Chuck Guzis wrote: On 10/26/2015 08:54 PM, wulfman wrote: To effectively drill in plastics you need to run the drill press on the highest speed you can and use a freshly sharpened drill bit. If this is Perspex/Plexiglas, I've had great results with a good sharp

Re: PDP 8 panels. Feedback

2015-10-27 Thread rod
OK Here's my two cents worth. First put tape across the area. Make sure it wont take the silk screen printing off. Get a small drill. A 1mm PCB drill is a good choice. Drill through with the drill set to a fast but not too fast speed. Turn the work over and re-clamp it. open up the hole but

Re: PDP 8 panels. Feedback

2015-10-27 Thread Paul Koning
> On Oct 27, 2015, at 12:33 PM, Jon Elson wrote: > > On 10/26/2015 11:38 PM, Chuck Guzis wrote: >> On 10/26/2015 08:54 PM, wulfman wrote: >>> To effectively drill in plastics you need to run the drill press on >>> the highest speed you can and use a freshly sharpened

Re: PDP 8 panels. Feedback

2015-10-27 Thread Jon Elson
On 10/27/2015 11:59 AM, Chuck Guzis wrote: On 10/27/2015 09:33 AM, Jon Elson wrote: The ultimate way to drill holes in Plexi is with an end mill. It can make a slight chipping when it punches through the back, so you either need a backstop material or lighten up the feed a bit just before

Re: PDP 8 panels. Feedback

2015-10-27 Thread Chuck Guzis
On 10/27/2015 09:33 AM, Jon Elson wrote: The ultimate way to drill holes in Plexi is with an end mill. It can make a slight chipping when it punches through the back, so you either need a backstop material or lighten up the feed a bit just before it goes through. (This of course requires a

Re: PDP 8 panels. Feedback

2015-10-27 Thread Chuck Guzis
On 10/27/2015 10:52 AM, Jon Elson wrote: You CAN use an end mill in a drill press if you are careful. You get no self-centering, so the work must be **SECURELY** clamped, as the cutter may try to walk. But, you'll get perfectly round, smooth holes. Twist drills tend to wander and make

Re: PDP 8 panels. Feedback

2015-10-26 Thread wulfman
To effectively drill in plastics you need to run the drill press on the highest speed you can and use a freshly sharpened drill bit. It kinda melts its way through. On 10/26/2015 8:28 PM, Bob Rosenbloom wrote: > On 10/26/2015 8:05 PM, rod wrote: >> Hi Guys >> I need to get some comments

Re: PDP 8 panels. Feedback

2015-10-26 Thread Ethan Dicks
On Mon, Oct 26, 2015 at 11:05 PM, rod wrote: > Hi Guys > I need to get some comments on the following. > > 1. Would a matt finish be better than the current glossy one? Hard to say, but generally, I think a closer match to the original is better. Is

Re: PDP 8 panels. Feedback

2015-10-26 Thread Bob Rosenbloom
On 10/26/2015 8:05 PM, rod wrote: Hi Guys I need to get some comments on the following. 1. Would a matt finish be better than the current glossy one? 2. Should the round holes be pre-drilled? Regards Rod I would prefer the holes be drilled. It's not easy to drill the plastic

PDP 8 panels. Feedback

2015-10-26 Thread rod
Hi Guys I need to get some comments on the following. 1. Would a matt finish be better than the current glossy one? 2. Should the round holes be pre-drilled? Regards Rod

Re: PDP 8 panels. Feedback

2015-10-26 Thread Chuck Guzis
On 10/26/2015 08:54 PM, wulfman wrote: To effectively drill in plastics you need to run the drill press on the highest speed you can and use a freshly sharpened drill bit. If this is Perspex/Plexiglas, I've had great results with a good sharp Forstner bit in my drill press at medium (say 750