Hy
I was thinking about feasibility of making linear stepper by myself. For now, it is all "theory" and none praxis, but i would like to hear from others, do you think the theory is right? Or maybe someone has allready done it in praxis?
For building the motor, only two thin soft iron sheets should be machined on mill:
a)one for stator - where notches are equally spaced -lets say milled with one milimeter diameter mill
b)the other iron sheet for "rotor" -with 4 groups of notches, relatively displaced to each other for 1/4 of a phase.
All other components could be "hand made"-without need for precision machining. Isolated sheets of metal are stacked together to form a core, glued to stator and rotor sheet, and copper wire is hand wound on to metal stacks. Connect the wires, find some linear guides, and the motor is ready to go
If distance between two notches is 2mm then each step is 1/4 of that, 0.5mm. When using half step scheme then resolution is 0.25mm and with microstepping even better.
I added some pictures to help visualise the idea. The mysterious pipes on pictures represent copper windings. I hope i didnt make some fundamental electrotechnic mistakes.
What do you think, is this idea worth a try? What details have i overlook?