Re: [CAD_CAM_EDM_DRO] Cheap place for new servos.

If you want to use the Gecko G3X0 drives then you have it a little off.

1 - The Shoptask does not need the power of a NEMA 34. I have one axis on
mine with a NEMA 23 and the other 2 axes with something that is slightly
smaller than a NEMA 34. You will have to make adapters to fir the Shoptask
as it is set up for NEMA 34 motors.

2 - The Geckos only use Brushed DC motors, not brushless.

3 - For a Shoptask with 5 tpi ball screws and a standard 2:1 belt reduction
a 200 - 250 line (800 - 1000 count per rev) encoder is as high as you will
want. There is absolutely no advantage to using a very high line count and
then using G340s to multiply the steps.

4 - My Shoptask is using 24 VDC motors and they are working fine.

5 - No gearhead at all

6 - X and Y need about 60 in/oz continuios and about 300 peak. Try for about
50% more on the Z.

Most of my servo motors came from E-bay. I have also gotten some that
Camtronics sells and they worked great. Send an e-mail to Dan, he can fix
you up for well under $200 per axis on the motor and encoders. Accept that
in hobby stuff surplus is a great money saver.

Tim
[Denver, CO]

-----Original Message-----

>I just oderer a shoptask and am looking into a servo CNC system. I have
>found many suppliers of servos but they all appear to be $500+ Am I

looking

>at the wrong types, most of you probably know what to get but to confirm
>what i'm looking for is here:
>
>Nema 34 Frame
>DC Brushless
>1000+ CPR integrated encoder
>24-90VDC
>4x Gearhead or not?
>and hopefully the most Torque I can get for the price.
>
>Where have others looked for there servos, non surplus? Unless it's
>impossible to get a new servo like this for less than $200? Ignore the

rest

>of the system, i've been following the thread and Gekko is the way to go.
>Thank for any help.
>
>
>Addresses:
>FAQ: http://www.ktmarketing.com/faq.html
>FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/