The Shop > Tools
Anybody build Dan Gelbart angled laser centre finder?
PekkaNF:
Good to hear you are fine.
I did a little something.
1) Idea is to use 0-ring and close fitting to hold it on it's place. It is fairly close fitting. Ironically I walked on the workshop today and got a piece of springy steel band from the strapping machine. I would go that way now.
2) I may design an adjustable angle to the laser, I'm working now with r=40 mm and 10/15 decree inclination, which will give me Goldilocks range. Really try aim 15 degrees +/-5 degrees of adjustment.
Screws are not countersunk yet, centre of the plate is not cut out and plate is way too big, but I want to test few configurations first.
Pekka
PekkaNF:
Well, I think I have a way.
Pekka
PekkaNF:
Well sort of...
Led candle battery holder and swich are pretty low quality. Hope they will last this test.
Screw up royal with hole saw. You can see decorative markings on mounting plate.
All screws are M4 eccept small screws that hold the laser lever detent. And led candle gubbins. Tried to get away with only one thread size and screw length, but used two different length and slot head screw to test the detent mechanism.
I used reamer FOUR times to green nylon piece. Can't beleive how much it deforms during milling and fitting. Almost screwd it up too. Measure once and cut twice error. Had to make slot for laser beam bigger than I had planned, because I managed so seat laser holder (shaft) 1 mm too much down. herefore oval hole allows this shaft to rotate in this recess.
Laser angle adjustment works pertty good. Have to see if the range is usable. I may make the detent a slighty stonger on middle part.
All adjustments are to be done tomorow. It has not been balaced either....
While making it I got few better ideas.
Pekka
Arbalist:
Some interesting ideas there Pekka, well done. :thumbup: Be interesting to see some pics of it in action.
PekkaNF:
Well the part I build works and the part I bougt doesnt.
Fought bit more than hour with battery holder/switch. It works intermitently. Plastic battery holder cap looks fine designwise, but apparently the lid is too thin and contact points may be not the best material for this purpose.
Any suggestions for single 3V battery or two small 1,5V battries?
Also I knowe that these laser modules does not generally have the laser beam axially to the body, laser beam exits more than one degree out of mechanical axis. Lucily on this design you can turn the laser module and the beam will be on the central plane, few degrees error here does not matter at all.
I used tape to hold down the wires.
I could not find from mthe hardwarestore or plumbing shop 52 mm ID 2,6 mm thick O-ring. I used short about half that size, cut half and a litlle tack to hold it in the grove. Even half of ot held the unit really nicely on the spindle. This one works.
Also the angle adjustment works. No problem there. The 10-20 degree angle is just about enough. I would not complain about bigger range. The mechanism works and there seem not to be any magic on the angle, just to find one that suits for that particular purpose.
Progress so far.
Turns out to be a mechanically a good testbed.
Pekka
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