Re: [CAD_CAM_EDM_DRO] 2 Fried G210's in a single day :-(

Hi Sean,

H-bridge trouble shooting can be hard. a shorted motor lead can take
them out before you know it.

I've posted this idea before on this list, but what you need to do is
put an automotive break lamp (12V) in series with the motor power to the
H-bridge (Gecko). The lamp will light up and limit the current to the
driver. ALWAYS use a fuze in EACH Gecko lead.

HTH

Alan KM6VV


audiomaker2000 wrote:

>
> Man.. this day is *not* going well.
>
> I just finished wiring up my Brideport Boss with my new Gecko 210's.
> I turn on the power.... Gecko 1 (X axis) LED glows dimmer than the
> other two so I power off... re-check the connections and voltage and
> power back on.... The drive is gone... no LED, no nothing.
> So, I figure I'll get back to that later and I start playing with
> the Z and Y axes...all is fine. Then I decide to wire up the limit
> switches so I power off the machine, but decide to move the Z axis
> which is very close to a limit for accessability so I power back on
> to move the axis and WOWOWOW... My arc welder makes less sparks!
> I have no clue what is wrong here. My voltage is steady at 72vdc,
> everything seems to be wired correctly and I cannot detect any
> shorts. In any case, now the Z axis is cooked (literally), and it
> had worked fine not two minutes earlier.
>
> I'm going broke at this rate. (well, I was already broke)
>
> Sean (whimper)