Re: stepper pulse rate idea

[Ray Henry <rehenry-at-up.net>]

Thanks Bill

Proves there are few new ideas in the world.  Thanks for the offer.  I'll get 
back to you when I need to do the testing.

Ray


On Thursday 13 March 2003 10:06 pm, Bill wrote:
> Hi Ray,
>
> While I don't have a need for such a thing, I may just happen to have what
> you need to do your testing if you are so inclined. Go here
>
> http://www.compumotor.com/manuals/oem/OEM_manuals.htm#OEM650
>
> Download the OEM650 manual and look at page 26 at what they call the "Gear
> Shift Input" Here's a quote from the manual.
>
>
> ///// BEGIN QUOTE
> Gear Shift Input
> The Gear shift input is an optically isolated input that uses and ILQ2
> quad OPTO isolator. The GS+ terminal is connected to the anode of
> the OPTO lead via a 681? current limiting resistor. The GS- terminal
> is connected to the cathode of the OPTO lead. The OPTO requires a
> minimum of 3.5 mA (approximately 3.5VDC) to ensure proper system
> operation.
> This function allows a user with a limited frequency generator to
> achieve higher velocities while using high resolution settings. This is
> accomplished by the drive multiplying each step pulse that it receives
> by a factor of 8. This function may be invoked on-the-fly;
> however, to prevent stalling and to keep track of motor position, it
> should only be invoked when the motor is not moving.
> ///// END QUOTE
>
> I have one of these drives here collecting dust if you want to borrow it,
> email me your address offline and I'll mail it to you.
>
> Bill