Hey hackers, cool site.
I purchased some LaserJet II used steppers, they're on their way. These are supposed to be rated for 1.4A per phase unipolar, 5.2V. If I drove these from 28V until 1.4A, then dropped to 5V, it that efficient?
Background:
I am beginning a CNC machine, smaller scale, likely about 12" x 8" table, gantry style, Most common use will be PCB, but small woodworking is a possibility.
The reason I ask this is the drive of this is an interesting part. I am an EE, and have access to all the requisite tools parts and SMT soldering. So I am disinclined to use an off the shelf IC, and use an analog approach.
The motors have 200 steps per rev, I have bought 3/8 Acme 12tpi, giving a theoretical resolution of 0.41 mils per step.
Thanks
John