On Sun, 01 Feb 2015 00:01:33 -0800, Gunner Asch
wrote:

On Sun, 01 Feb 2015 01:08:48 -0500, wrote:

On Sat, 31 Jan 2015 23:51:59 -0600, "Terry Coombs"
wrote:

Larry Jaques wrote:
On Wed, 28 Jan 2015 22:58:41 -0600, "Terry Coombs"
wrote:

Got any stepper motors for cheep? I think nema 34's will work , I
want to

From $12.99 w/ f/s on eBay http://tinyurl.com/of8584m
How much torque do you need?


Those cheaper ones are all nema 17's , I already have 2 of those . I have
the power supply here now that I intended to power those with , I'll be
looking at some reduction for torque increase . I can get either 9:1 or 16:1
in a fairly small package using 20dp gears . I never expected the responses
this thread generated ... I just wanted a uniform speed for the X , and if I
can work it out the Z .
With steppers on x and y you can program for angle cuts too.

The price of servos has fallen and they are readily available in the
used market. Why not simply use servos rather than jitterbugs?

It's my impression that for the DIYer, stepper controls are easier and
cheaper to source - but if good surplus servo controls are available
at reasonable price, of coarse use them. I've got several rather large
and clunky servos around, but no drive circuitry. Definitely too big
to put on my Myford lathe - - - - . Then there are the servoed motors
out of inkjet computers - too small for the job.
Steppers out of old LaserJets are a dime a dozen and about the right
size.....

Gunner

"At the core of liberalism is the spoiled child,
miserable, as all spoiled children are, unsatisfied,
demanding, ill-disciplined, despotic and useless.
Liberalism is a philosophy of sniveling brats."
PJ O'Rourke