Re: Arcsin 3 axis

> 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


The A3977 chip is maxed out at 35 volts and is unstable at that
voltage. Back EMF will blow the chip if run from a 35V supply.

As I undrstand they are very stable with a 24 volt supply.

As I see the contenders

Xylotex 24V @ 2.5 amp
HobbyCNC 44volts @ 3 amp
ArcSin 48V @ 3A
Gecko is 80V @ 7amp

the Gecko is really made of components that are rated for
10amp/100volt. As a device, it is rated by the manufacturer for 80
volts and 7 amps. (20% less volts, 30% less amps) and at that 7A/80V
use, it is a brick.

If you de-rate the A3977 chip from the 2.5A/35V in the same manner to
1.75A and 28 volts, it too should be rock solid.

I don't know the HobbyCNC or ArcSin components well enough to know
they are rated for the max of the parts or de-rated for the
application.

Also, the HobbyCNC and ARCSIN as well as the Xylotex have parallel
ports on board whereas the Geckos do not. That means the $114 each
for the geckos is not a full system but add between $25 and $150 for
a parallel port breakout board to get a comparative Gecko price.

($114 x 3 + $25 = $367 for a 3 axis Gecko)

The ArcSin is right between the Xylotex and Gecko.

the ArcSin is Fully Assembled whereas the HobbyCNC is a kit. Add for
your time to get a better comparison of those two.

Dave