Re: Members

Hi Peter,

For the transformer, a 24V transformer will give you about 37V out of
the bridge/cap. I wouldn't worry about multiple voltage taps. If you
want FAST, a 48V (pair of 24V xfmrs in series) could be used to get
about 67V.

IMO, 37V for the Gecko's/Sherline would be fine.

A transformer with these specific taps may be hard to find, anyway.
Alan KM6VV


cadcamcenter@... wrote:

>
> Hi Alan, others
>
> > Hi Art, Peter,
> > So is there any treatment for this disease we have? Will I
>
> The fact that I am still checking the mailbox, & now posting again
> after that sharp reprimand from Tim means I am now beyond cure. Sigh.
>
> Regarding power supply, I'm thinking of something like this, using a
> multi-terminals transformer:
>
> transformer
> _______
> \___ A switch
> / \
> \__ B...\___\
> / . /
> \___ C. to bridge
> / rectifier
> \
> _______/___________\
> /
> For 3 X Geckos 201A & 3.2V 2Amp stepper, 20tpi leadscrew (sherline),
> 48VAC 6Amp transformer.
>
> Position A 48vAC: when expecting high ipm like 150ipm
> (600,000step/min)
> position B 32vAC: medium ipm (45ipm or 150,000step/min)
> position C 16vAC: low ipm (15ipm or 60,000step/min
>
> Is the above practical/desirable?
>
> Beyond Help