Re: Buildlog.net Open Source Laser
Posted: Fri Feb 19, 2010 1:39 pm
I have been trying to make it simpler to fabricate all the parts. I want a decent laser cutter to be able to make complete set of parts for another laser. Obviously there will be a few places to drill and tap, but the bulk of the work should be done by the laser.
The bearings are 3/16" thick and the acrylic is 6mm 0r 0.25" thick. There were a few places where bearings mounted in counter bored holes. This is a tough hole to make without a CNC router.
I think I have a workable solution. A through hole is sized for a tight fit on the bearing. The bearing is pressed into the hole then a oring is is used to hold it in place with some #4-40 hardware and washers. The oring is hard at 70 durometer and cheap at $3 per 100 at McMaster Carr.
I should be cutting some parts pretty soon. I am still waiting for a part for my router. A lot more of the parts are now made out of Acrylic and they all easily fit on a medium sized (P2) sheet from Ponoko
.
The bearings are 3/16" thick and the acrylic is 6mm 0r 0.25" thick. There were a few places where bearings mounted in counter bored holes. This is a tough hole to make without a CNC router.
I think I have a workable solution. A through hole is sized for a tight fit on the bearing. The bearing is pressed into the hole then a oring is is used to hold it in place with some #4-40 hardware and washers. The oring is hard at 70 durometer and cheap at $3 per 100 at McMaster Carr.
I should be cutting some parts pretty soon. I am still waiting for a part for my router. A lot more of the parts are now made out of Acrylic and they all easily fit on a medium sized (P2) sheet from Ponoko
.