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post #11 of 46 (permalink) Old 12-06-2015, 10:35 PM
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My Porter Cable DP has one, but I rarely use it. I believe that its accuracy is sensitive to table height, but I've never bothered to verify that. Bottom line is that I just don't trust it for anything but coarse positioning so it mainly stays off.
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post #12 of 46 (permalink) Old 12-06-2015, 11:05 PM
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Originally Posted by TheCableGuy View Post
Ok I never thought it going out of alignment when you change the table height .
That would certainly be a deal breaker
and the width of the laser line changes too along w/ the sharpness of the line because of the focal length..

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post #13 of 46 (permalink) Old 12-07-2015, 01:48 AM
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I have a pair on my drill press and after a few uses I found it was a hassle to keep readjusting them whenever the table was moved so I haven't used them in a long while. Perhaps if I was doing something where I was making a lot of similar parts with one setup they might be handy, but for day to day drilling I don't use them.
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post #14 of 46 (permalink) Old 12-07-2015, 02:48 AM Thread Starter
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Chuck, you are right about the parallax. The best explanation I can give is as the laser is projected there is a line visible on the table. The top adjustment will rotate the beam in a circular direction like around the face of a clock.(Beam direction) The bottom adjustment determines what angle the light is presented to the table surface.(Angle direction)

As an exaggeration if the laser is directed to the table at a 45º angle you will still see the line and it can be adjusted to cross a centering point. This location will change with the table height. It can't just be vertical from the lens because of the offset.(Parallax)

There is an alignment tool that you put in the chuck. It has a flat surface which is faced towards the support post of the drill press. This tool has a centerline running vertically. You adjust the angle direction to follow this centerline. The result is a line that is projected across the center point which does not change with table height. In effect this is a true vertical line. The set up process is done by covering one laser with tape and adjusting the other; then you switch the tape to adjust the other laser.

This is a situation where photos easily illustrate the problem and the solution but it is tough to put into words. During set up my exaggeration is exactly what happened for me. It took me 30 minutes to get both lasers properly adjusted. Did my explanation make any sense to you?
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post #15 of 46 (permalink) Old 12-07-2015, 05:50 AM
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Originally Posted by Mike View Post
Mark, I wonder if the beam direction and angle are fully adjustable on your drill press? Could you please post a photo of the laser housing? This is a learning experience for all of us. If the location varies at different table heights I suspect the beam angle is not perfectly vertical.

I will get a couple of close up photos of the right laser head showing how the adjustments are made and the alignment tool.
Its a Ryobi bench top model DP. As far as I know, not adjustable - maybe I need to read the manual. I agree with with Stick, the line width is sometimes self-defeating on the smaller holes. The laser crosses the table NW/SE and NE/SW. Maybe the bolt-on units are better.
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post #16 of 46 (permalink) Old 12-07-2015, 05:54 AM
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I have the Peachtree laser and it works perfectly. It has been in use for three years and has not needed readjustment yet. Table height doesn't change the accuracy at all.
The most important thing in my opinion has been to just install, adjust according to the instructions, and, most importantly, don't try to analyze how or why it works!
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post #17 of 46 (permalink) Old 12-07-2015, 07:38 AM
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Mike the one you have looks exactly like the one that came on my Delta drill press except for the colour. Mine is black. I removed it a couple of years ago as I did not trust it. Recently reinstalled it but have it set for a table height I use frequently. I do not use it for one of jobs where the table height is changed where I had set and adjusted the lasers.
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post #18 of 46 (permalink) Old 12-07-2015, 08:07 AM
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My drill press came with the laser device and although I don't use it all that much, I will be using it to drill the 52 holes in each of the 10 bases of those wine basket frames that I'm doing for my basket weaving friend. Not difficult at all to set up and in this case, where no height adjustments will be made, it's worthwhile. I'll also use a fence for distance "in" from the edge but the laser will help with the spacing between holes. It's a guide, if you don't like it, don't use it. Mine has a dial for x and a dial for y setting....I put a bit in the DP and set it about a 1/4" above the work piece and then set the laser(s) where the bit will make the hole....if it took more than a minute to do this I'd be surprised.
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post #19 of 46 (permalink) Old 12-07-2015, 09:54 AM
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Default Drill Press Laser

I have been using an the aftermarket drill press laser for two years and have not had a problem with it. the key is to adjust it to the direction of the manufacturer. I like mine.
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post #20 of 46 (permalink) Old 12-07-2015, 10:17 AM
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My drill Delta press came with the lasers. Adjusting them was very difficult, so I don't use them. Maybe I should re-read the alignment instructions and try again.


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