Re: [CAD_CAM_EDM_DRO] bipolar o unipolar stepper ?

Emme: I had already written a reply to every line of your inquiry (below),
and when I tried to SEND, my stupid computer "locked up" and NOTHING could get
things going again but "RESET"! So, I will try again, this time SAVING after
every line!
Which kind of motor do you prefer ? Unipolar o Bipolar steppers ?<<
Bipolar, without hesitation! I would use Unipolar motors ONLY for
replacement, where working driver-electronics were OK, and it was a simple "swap it out"
situation!
I'm designing a cnc table of 100x150 cm x 50cm height useful with
mobile bridge (table fixed).<<
This is called a "moveable gantry" design.
Which motor power for the stepper do you think I need ? I like to use
this machine to cut and engraving wood of 3 cm of thickness....<<
You might be OK with "3-stack" bipolar Size-34 "high torque" (the new, square
kind, "KML-" if Superior Electric make. You MAY need Size-42 bipolar for
the longer axis, but that is difficult to guess, not knowing your precise needs
nor machining-skills, etc.
I hope to reach a tollerance of 0,1 mm for the machine.<<
This is completely reasonable, even with 20 mm/turn ball-screws. I managed
this with 25 mm/turn ball-screws in a 1.5 x 3 meter X-Y router nearly twenty
years back with HUGH unipolar motors.
What do you tink about ? It's a dream ? :-) ?<<
No! If you have the components and/or money, and reasonable
machining-skills, this is readily attainable for a clever person! If I could do it, surely
ANYone can do it!

I just tried to put a Gecko link here, and my system locked-up again! So,
there's a "bug" in there, so I will just send this without the Gecko link, and
hope Mariss or whoever will send you that, separately. Meantime, I hope to
TRY to fix this dang mess here!

Lotsa luck! Jan Rowland
Texas!!!


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