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post #41 of 46 (permalink) Old 12-08-2015, 10:48 AM
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Originally Posted by Quillman View Post
What a pity. Hi tech for the sake of it and it's nuthin' but a guess.

I have to agree with you Pat for several reasons, none of which may be the same as yours. In order to be accurate the lines would have to be very fine which would make them very hard to see, especially in good lighting, which you would need to see the mark where you want the hole drilled. Then there is the question of whether they will stay aligned with the vibration from the DP shaking them constantly. So even though I can see how to make it work I doubt I would find any circumstances where I would be interested in using them.
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post #42 of 46 (permalink) Old 12-08-2015, 02:34 PM
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Here's the problem I have with the drill press laser guides. First I calibrated the laser by clamping a piece of stock down on the drill press table and drilling a shallow 1/8" hole. I then calibrated the laser so the cross hairs aligned with the hole. As long as I didn't move the table I could drill multiple holes correctly.

However, when I dropped the table about 2" the laser no longer accurately showed where the center of the hole would be. You can see from the photo that it is off by about 1/16". That probably isn't close enough if you are trying to drill hole in parts that need to align for assembly.
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post #43 of 46 (permalink) Old 12-08-2015, 02:34 PM
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I'm after medium to .001" resolution.
And a laser will not get me there.
And I really don't understand those that say it's (laser) perfect.
For rough work, yes, but even on .005" - .010" centers you're guessin' & hopin', not knowin'.
I know the importance of close order drilling and the consequences if you can't.
Have studied this for a long time. In fact this fence is predicated on being able to drill to
.001". Not only for the hole diameters, centers, and the coordinates for a set of centered holes but their roundness. Absurd for wood, but not for metal and plastic.
And if you make jigs, the essence of precise woodworking, you need metal and plastic substrates.
And therefore, you need the skills, drills and machine to do just that.
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post #44 of 46 (permalink) Old 12-08-2015, 06:53 PM
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Oliver if you can't make it work accurately , there's no way I'm going to get it right lol . Think I'll just get a cnc router table and use it for precise drilling
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post #45 of 46 (permalink) Old 12-08-2015, 07:58 PM
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When I need to hit a mark 'right on' I make a clearly visible cross using a ruler and no larger that 0.5mm pencil. Line it up visually from several perspectives and clamp it to the fence. Next I pull the bit down with the DP 'off' making a small impression in the wood. If the peck lines up with the cross-hair, drill the hole. If not, repeat. There is no way that I can get that kind of precision using a laser. The hardest part is accurately marking a precise cross-hair.

Last edited by Ratbob; 12-08-2015 at 08:02 PM.
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post #46 of 46 (permalink) Old 12-13-2015, 12:33 PM
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