CAD CAM EDM DRO - Yahoo Group Archive

Re: Stepper motors ( giants ) cheap.

Posted by Gary
on 2000-08-21 07:38:09 UTC
--- In CAD_CAM_EDM_DRO@egroups.com, "Art Fenerty" <fenerty@h...>
wrote:
>
http://www.aaaim.com/cgi-local/shop991/shop.pl/SID=169252838262/page=S
TMS.htm#SSM2000
> This sounds like an excellent solution for those of us who don't
have the "better half's" financial support!! HEHE Do you have a
circuit diagram for the controller/driver you are using? I have
built
a driver using L298's and it works beautifully but the operating
voltage of the syn. motors is way too high for the 298's. Does
anyone
know if I could use solid state relays controlled by the 298's?
Would
the relays be fast enough to react to the step commands?
> The 720 oz/inch AC syncronous motors on the above page are the ones
> I rewired to make large and strong steppers. They work pretty good
on my router table.
> I get 4"/sec with alot of torque. They tend to be very cheap
compared to strong steppers
> and the only drawback is a maximum 72RPM. With microstepping you
don't have
> to gear down much.
>
> You just cut out the circuit board in the back of the motor,
> and wire the 4 - 90degree opposing coils together, to create
> each of two bipolar windings.
>
> 1 ---- 2
>
> 3 5
> | |
> 4 6
>
> 7---- 8
>
> wire together 1,8,4,5 as wire Phase A common
> wire together 2,7,3,6 as wire Phase A Hot
>
> Rotate the motor 90 degrees and repeat the proceedure on the
remaining 4 coils for
> Phase B.
>
> Thats it, Close the motor up, connect to a controller ( I use
55Volts at 1.8Amps microstepped )
> and away you go. They don't heat up and have lots of power, so I
think the Voltage could be
> increased to about 180VDC with no problem.
>
> Let me know if you need more info.
> Art
>
>
> [Non-text portions of this message have been removed]

Discussion Thread

Art Fenerty 2000-08-18 19:32:51 UTC Stepper motors ( giants ) cheap. Terry May 2000-08-18 20:13:39 UTC Re: Stepper motors ( giants ) cheap. Tim Goldstein 2000-08-18 20:34:30 UTC RE: [CAD_CAM_EDM_DRO] Re: Stepper motors ( giants ) cheap. Art Fenerty 2000-08-19 05:31:43 UTC Re: [CAD_CAM_EDM_DRO] Re: Stepper motors ( giants ) cheap. Terry May 2000-08-19 07:55:38 UTC Re: Stepper motors ( giants ) cheap. Gary 2000-08-21 07:38:09 UTC Re: Stepper motors ( giants ) cheap.