Re: [CAD_CAM_EDM_DRO] Austrailian bipolar driver Kits

Joe,
I bought one of the Oatley single axis boards on the claim of 80+ volts and
10+ amps. When I asked them for specific instructions on how to set things
up for 8 amps using an 80 volt power supply they said it would take major
modifications and offered to take the kit back for a full refund. It looks
like you have to replace all of the MOSSFETS, add heat sinks to everything
that carries any current and the amperage is controlled by resistors (it is
not a chopper driver) so you need some high watt resistors with heat sinks.
For small motors, it looked like an ok board.
Darrell

----- Original Message -----
From: Joe Vicars <jvicars@...>
To: <CAD_CAM_EDM_DRO@onelist.com>; <diazden@...>
Sent: Monday, March 06, 2000 6:43 AM
Subject: [CAD_CAM_EDM_DRO] Austrailian bipolar driver Kits


> From: Joe Vicars <jvicars@...>
>
> I bought the K109 two axis driver kit. I am assuming it runs on
> step/dir based on the description of the K142 (the two are supposed to
> be very similar) I will let everyone know how it goes together. I was
> a little skeptical about the 14 amp claim myself and I am wondering what
> needs to be heatsink-ed and how much? Just the switching FET's ? I
> have zero board building experience so the probability of frying this
> board is high I am afraid.
> If I send out the circut diagram and component list would that be
> worthwhile? Should I get permission from Oatley?
>
> Mariano, is there any way you can get me an email copy of the
> article on the Oatley boards you mentioned?
>
>
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