Re: Arcsin 3 axis

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Dave Shiels <dshiels@e...>
wrote:

> Talk to me about this controller! seems reasonable but the

electronics

> specifics are over my head.
> this sounds good to me
> All DMOS H-bridge power section delivering 3A per phase continuous(6A
> peak) at up to 48V.
> at 30KHz with single, 1/2,1/4,1/8 steps
> http://www.buildyouridea.com/hardware/arcsin/arcsin.html

Dave: After studying the site I came away with the following thoughts:

The chopper and microstepping approach make this a contender for the
middle part of the market. The Three amp rating puts it square between
the Xylotex and three Gecko 201's. It would be a good choice for a
design where you had 3A stepper motors (maybe up to 3.5A). The 48VDC
rating is reasonable (better than the 35 on the Xylotex and not as good
as the 80 on the Gecko's). Depending on the stepper motor that voltage
should give pretty good performance.

The only thing I see about the unit is that the cost is relatively high
compared to the Xylotex (2.5A @ 35V 3 Axis = $145.00) and three Gecko's
(7A 80VDC X 3 units = $342) at twice the specs but only 28% more in
cost.

If you are into soldering, the Hobbycnc 4AUPC Kits are very reasonably
priced. They are Unipolar divers (3A 44V) but are chopper and
microstepping and have gotten some good comments from the list members.

If you can give us an idea of the type and size machine you are going
to build we can talk about the motors then we can talk about the best
drive boards for the application.