Re: Stepper Question (Newby)

--- In CAD_CAM_EDM_DRO@y..., "Art Fenerty" <fenerty@h...> wrote:

> Hi Alan:
>
> A good preliminary test is to tell your motors to turn very

slowly. Even

> if your current is too low, or voltage is too low, you will

normally have

> lots of power when going slow. Does your motor click forward, then

back,

> when you do this? This would indicate a defective wiring on one

phase. Does

> this loss of power only happen when you go fast? This would

indicate a

> current which is too low. The SP3 kit is a little underpowered for

larger

> motors, but should work fine for lower ones. 150 oz/in is about the

max you

> would wish to drive with it. All stepper motors will show the

symptoms you

> describe if you try to go too fast for the motor's power

conditions. Is it

> better in one direction than the other? , this can indicate that

you are

> pulseing the controller with the wrong polarity signal (Though most
> controllers are mostly unaffected by this). The problem your having

is not

> uncommon and I have had questions on it from many different people

over the

> past year, most with different solutions. Send us some more

information and

> I'm sure someone here can help solve the mystery.
>
> Art
> Master5 Software
> http://users.andara.com/~fenerty/master.htm

Hi Art and others who have responded to my question.

The FET-3 Driver is based on the SP-3 board but with a high-current
power output section rated to 15 amps per phase compared to 1.25 amps
per phase on the SP-3.
Power supply is 24V and should have enough current available to run
the motors in a high current state simultaniously.

The loss of power seems to not be affected by the speed......

Thanks for all input. I am "Not" very electronics literate and a
friend helped me get things wired.

Alan