Re: servo vs stepper

Thanks Dave, I had my electrician look over the power and he thought
all was well. I used the Nema 42 since the mountings were already
setup on the original CNC Boss 6 system since my machine was born a
CNC. It would be pretty difficult to switch to Nema 34 but it could
be done. It might all come down to needing much more power and I
will be testing a different driver with built in power tomorrow. I
have resorted to just plugging the powersupply to the wall as it did
bother the backup supply by creating a temporary fault. I will also
be trying a different pulse generator to see where the weak link is.
It is strange to me also that so many others have had success and I
am struggling... painfully...

Keith Clark

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "turbulatordude"
<davemucha@j...> wrote:

> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Keith Clark" <mail@t...>
> wrote:
> > As many have read, I have been having a bad time making stepper
> > motors work using Gecko drives.
>
> I didn't read the whole thread as you were getting advice from all
> quarters.
>
> I did notice some odd things. NEMA42 motors ? Huge, and with

high

> power needed to overcome the holding torque.
>
> back-up power supply, I never got one to work as when I turned on

the

> transformer the BBU/PS when crazy.
>
> I don't recall if you used the recomended non-regulated power

supply

> or if a regulated one was used. (If switching, did you add a
> capacitor after it ?)
>
> Software other than Turbo-CNC to test the machine.
>
> Soooo many people have gotten their systems to work, it is odd that
> you have had so many problems.
>
> But, if your power supply is not correct, servos will fail too.
>
>
> If your machine is too tight or has high friction in places, the
> overall system will have problems.
>
> If your software is not outputting quality steps, then your motor
> cannot work properly.
>
> The reason I use T-CNC for set-up is that it is like a hammer. No
> frills, just plain pulses in a DOS environment.
>
> Run whatever you need to make parts, but set-up with the simplest
> tools you can.
>
> Switching to Servo's will either solve the problem, probably by
> replacing something not matched to the system, or will reveal what
> the real problem is like using an extention cord that is too long

or

> too small, or endswitches that are effecting the logic power by
> grounding....
>
> On the good side, if you do swap out, your parts will sell for top

$$

> on e-bay.
>
> Dave