Some small projects seem to attract Murphy!
I bought 5 Sanyo Denki 60mm x 60mm stepper motors for $100 from ebay when they sell for $200 each. Then I had to find some wiring harnesses for them. They finally arrived. So a few days ago I thought I'd fit the easy one up so I pulled off the pulley and drilled it out to an 8mm bore and enlarged the mounting holes on the motor.
Very shortly afterwards I found out that the Sanyos had a different mounting pitch on the bolt holes to a normal NEMA 23 and it did not fit!
I never really got my little Seig SX3 set up after relocating it from home to my workshop and I had a bit of work on it so I could use it again.
Friday, I dug out the CAD drawings and redesigned the mounting plate. Then I went up the road to buy 1 metre 60mm x 6mm flat bar material when I only needed 60mm of it! While I was there, I bought an offcut of 6mm aluminum plate so that next time I can cut out mounting plates and spot the drill holes..
Anyway after drilling and tapping 8 holes in my 60mm square of Ally, its back together.
I guess that one advantage of building your own machine. You can upgrade it.
This is quite massive compared to what was on it before
The old motor was 1.9 Nm (269 oz/in) and the new one is 2.7 Nm (382 oz/in). It will be interesting to see if I get any better performance once I get my machine back together with the Lam drivers.. So now I have to work out how to fit one up on the Z axis!
