Re: [CAD_CAM_EDM_DRO] Stepper size?

In a message dated 26-Sep-01 19:29:10 Central Daylight Time,
zbadone@... writes:

> Anybody have an opinion on these types of stepper or do you have
> another source I could look at?
>
>

Though the Size-34 is considerably larger than the first one you list, they
both have the same torque, and in MY opinion, based totally upon experience,
neither would be quite adequate for more than "plotting" or running a 1/8"
dia solid-carbide fresh router bit through basswood, to a depth of maybe 1/4"
at relatively slow linear rate. For the size and application you describe, I
would go with fresh KML-092 bipolar steppers from Superior Electric (oh, and
their drives come "in a box with power-supply, all ready to run, 2 axis per).
Or, if you can do the electronic hardware, the Gecko drives are electrically
adequate, and very, very well made! I have received mine, but not yet gotten
to trying 'em, yet. Too much to do!

Screws? Use Ball-Screws and Actuators, Inc., San Jose, CA ACME screws with
their preloaded turcite nuts. Ball-screws are a luxury you don't need with
the application you describe. But use DCC ball-bearings for the screws, and
best workmanship you can muster.

Lotsa luck! Jan Rowland


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