Optical Kinematic Mount - Low profile 3-axis

These are the mount's I've designed and used in my series of videos on using a laser and webcam to measure flatness down to a micron. I've designed it to have course and fine adjust on the tilt axis. This is done with a linear spring reduction. The small stainless steel plates are there so that the screws don't dig into the 3d printed material which might deform very slightly due to temperature fluctuations. 

The bolt holes to attach these to an optical breadboard are 50mm square.

I find they work very well but could also be remixed without the steel plates if high accuracy isn't as important. 

How to make:

You'll need the following items to build one of these:

• 3x small springs ~8-10mm long x <4mm diameter
• 2x stainless steel or sheet metal squares. Cut these into shape. (I used 18ga stainless steel material I had and machined it to size)
• 1x Longer springy steel plate (I ground up an old hacksaw blade to use for this)
• 1x 7mm ball bearing (this is the pivot)
• 7x M3 12mm socket head cap bolts. The ones used to adjust the angles, I highly suggest grinding the bottoms round and smooth.
• 1.4mm x 11mm pins (these hold the springs in place. 2x for each spring) I used a long piece of stainless steel welding rod. You can use anything similar and cut to size.
• Brass M3 heat inserts for all the bolts. See a YouTube video on how to use these or make a test part if your not sure. 

3d printer material:

Material is less important. I printed these ones in PETG but PLA could also work. I would highly suggest using a black filament instead of clear like I used. The laser light reflects off the mounts and black would help eliminate that.