Re: [CAD_CAM_EDM_DRO] Re: loosing steps

Gene wrote:

> Here's what I found out.
> The Oriental Motor specifications are:
>
> Holding Torque: 305 oz-in(for Unipolar), 430 oz-in(for Bipolar) at full
> step
> mode.
> Voltage: 2 Volt (Unipolar), 1.4Volt (Bipolar)
> Amperes: 4.5A/phase (Unipolar), 6.3A/phase (Bipolar)
> It is a 8 wire motor hooked up in parallel. it is hooked to gecko 201. I
> don't know if its unipolar or bipolar.

The Gecko is a bipolar driver.

> I guess if its bipolar I need
> more amps.

This should help the mid speed problem, if the motor skips steps at a speed
where the current limit is still in play.

> I think I need a 390k resistor? can I put a smaller Resistor
> and raise the amps a smaller amount ? I sdont think my power supply will
> handle a full 6.3 amps, its a 10 amp supply.

Ah, but it doesn't need to supply 6.3 Amps, except during rapid accelerations
or running at high speed under load. Anyway, you can try it for a short
time and see if the lost steps problem is improved. If so, then you can look
into getting a bigger power supply.

Jon