Re: gecko burned again

Ron,

It is strange that is works fine for several weeks then starts
failing. The eventual failure is preceeded by trouble maintaining
steps then finally a lockup and burned drive. I have the accel and
rapid speed actually backed down and still had the problem. There
is a capacitor at the drive as recommended by Mariss from
Geckodrives. I guess I could buy another Gecko and turn down the
accel and rapid speed as you suggest and see if it happens again.

What also is strange is that the fuse in the circuit did not blow.
It is a delay type fuse. Should I switch to a different type of
fuse?

Thanks,

Keith

--- In CAD_CAM_EDM_DRO@yahoogroups.com, R Rogers <rogersmach@y...>
wrote:

> Hi Keith,
>
> Finding a suitable low cost drive for big steppers on a B/port was

the reason I changed over to servos. Your setup is working save the
occasional drive problem. Can you possibly limit the current on that
one drive for holding torque? You said it was during a move so,
maybe turn down the velocity and acceleration in Mach2 axis
configuration for "Y"?. It's probable that some fine tuning might
eliminate future problems. If it works one month it should work many
months. I lost a Gecko 320 last week and it was because the current
coming into the shop was surging for a few days. Many on here said
if I'd had a capacitor on the leads coming from the power supply
right at the drive it would probably not have blown. Possibly this
is your issue as well?

>
>
> Ron
>
> Keith Clark <mail@t...> wrote:
>
>
> Well, the y axis gecko drive burned again this morning. This time
> there are no loose wires. I was doing very little with the machine
> and had just turned it on when during a y axis G0 move, the drive
> burned up. I assume this is an indication that the Gecko cannot
> handle the motor I am using. This is an old topic and I have asked
> for help with this problem before. The mill is a Bridgeport Series
> 1 CNC originally controlled by Boss 6 but now using Anaheim Nema

42

> high torque stepper motors and Mach2 software with a Campbell
> breakout board.
>
> At this point is seems reasonable to try another brand drive?
>
> Thanks
> Keith Clark
> clarkfamily5@c...
>
>
>
>
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