 Linear Encoder Question | |
Hello,
I have the opportunity to buy a used Coordinate Measuring Machine for parts (it's in rough shape and I don't really need two tons of granite in my shop) and I was wondering if somebody could help me out with a couple of questions.
It has 3 linear encoders (x~4',y~3',z~1.5'). The scales seem to be etched on stainless strips (~1/2") that are mounted on steel bars that are about 1/4" x 1". The etched lines run repeatedly for about a 1/4 inch and then seem to pause for 3/8 inch and then repeat. I have never seen a linear encoder before - what type of resolution would you guess these have (it was a nice machine at one time)? Would they be suitable for a DRO system on a lathe?
It also seems to have what I would call pneumatic bearings - little ~ 3x3" brass pads that use air pressure to reduce friction. They seem pretty neat. Has anyone here used them on a project? Ideas? Anyone know of a place online that sells something similar? I'm currious as to what they would cost new.
Thanks for your time.
-Jason  |