Hi all,
BACKGROUND-I am making a scotch mount, also called a barn door mount, for astro-photography. I need to drive a motor at a fixed speed, but I will have to tune it to that speed very carefully, and then set it and never adjust again. Not much torque is required.
I thought a stepper motor would be a good way to go, as opposed to a DC motor with some kind of feedback for rate control.
I bought a cheap controller off eBay exactly (as far as I can tell) the same as this:
http://www.directindustry.com/prod/hurst-manufacturing/stepper-motor-controllers-14601-482621.html
Has anyone had experience with this controller? It sells cheaply on eBay and all the instructions on it's use seem to be consistent. I only want to use it in button control mode if possible.
PROBLEM - When I run it in button control mode, the INC and DEC buttons do increase and decrease the speed, but they also reverse the direction. Ie. INC will increase the clockwise rotational speed, but when I hit DEC the motor changes to anti-clockwise, at a slightly slower rate. This is hopeless! Anyone know how to keep it moving in only one direction while making speed adjustments? I have Jumper JP1 on, jumper JP2 off, as per instructions.
Thanks in advance
Stuart
BACKGROUND-I am making a scotch mount, also called a barn door mount, for astro-photography. I need to drive a motor at a fixed speed, but I will have to tune it to that speed very carefully, and then set it and never adjust again. Not much torque is required.
I thought a stepper motor would be a good way to go, as opposed to a DC motor with some kind of feedback for rate control.
I bought a cheap controller off eBay exactly (as far as I can tell) the same as this:
http://www.directindustry.com/prod/hurst-manufacturing/stepper-motor-controllers-14601-482621.html
Has anyone had experience with this controller? It sells cheaply on eBay and all the instructions on it's use seem to be consistent. I only want to use it in button control mode if possible.
PROBLEM - When I run it in button control mode, the INC and DEC buttons do increase and decrease the speed, but they also reverse the direction. Ie. INC will increase the clockwise rotational speed, but when I hit DEC the motor changes to anti-clockwise, at a slightly slower rate. This is hopeless! Anyone know how to keep it moving in only one direction while making speed adjustments? I have Jumper JP1 on, jumper JP2 off, as per instructions.
Thanks in advance
Stuart