In this thread...
http://stevedgood.com/community/index.php?topic=5452.0 ... I mentioned I had a need for a magnifier/lamp and explained how I had found some items to build my own at a fraction of the cost of commercial units.
I have now built the device and thought I would post pictures in case anyone was interested. It is designed to be functional at present and looks were not a consideration. I just wanted to see if the principle would work. Now I have proved the principle is sound I can always go back and make it 'pretty'!
The three key pieces are an 8" x 10" Fresnel lens with 2x magnification found in the Walmart craft section for $4.65 CDN, a $3.00 CDN aluminum flashlight with 9 LEDs that is super-bright even in daylight or with the room light on at night and a 'broom clip' that cost $2.00 CDN for a pair of clips. In addition I used whatever I had to hand in terms of wood and a few hardware fittings and screws.
Here are a couple of shots to give you an overview.
The vertical rod is 7/8" dowel, the horizontal rod parallel to the machine is 3/4" dowel and the white rod perpendicular to that is a piece of 3/8" solid fibreglass rod left over from one of my kite building projects. The FG rod is very stiff for the diameter but if you were thinking of building something similar in wood I would suggest no less than 1/2" dowel for this rod as you need the stiffness otherwise vibration/sag could be an issue.
The Fresnel lens is fitted into a groove in the wooden block (cut on the scroll saw) and a saw cut extends up the block beyond the screws. The two screws then pinch the wood down onto the lens holding it in position. If I ever need to use the lens elsewhere then simply slackening the two screws will release it without having to drill holes in the lens. Likewise at the other end of the block a slot cut into the hole for the FG rod allows the two screws to pinch the wood down and clamps the block to the rod.
Here's a shot from the 'operator's position'. I did not zoom in excessively and the working area really does look that big through the lens. The distortion you see is partly down to the camera I think as the view in real life is much better.
Here are some shots of the flashlight and how it is mounted.
The main clamp bracket allows the flashlight to slide along the dowel and rotate around the dowel. The secondary bracket allows the flashlight to swing in an arc so that it can be positioned wherever it is need to give the best illumination. The 'broom clip' also means that I can easily unclip the flashlight if I need it to find any dropped parts (like a blade adapter dropped through the hole in the table!
).
So there you have it. A functional magnifier and lamp for a little over $10 CDN with the hardware and whatever wood I had lying around the place here.
NOTE: The forum software has reduced the size of the images so if you want to see larger pictures right-click on them and select 'View Image' or whatever the term is in your particular browser.