Servo Motor Mod Info

[TomG]

After reading tons of threads and sites on the servo motor mod, and not being able to get a smooth response myself, I did some experimenting.

I made a graphic with 3 different black to white gradients. 15, 25 and 30% from the edge. Mine motor worked best with the 30% gradient.

I used some thin, translucent plastic from one of the dollar store cutting pad (abt 1mm), about the width of the paddle blade. I printed the gradient on photo, best quality mode. I then used doublesided tape to tape the gradient to the plastic and trimmed.

I slid the strip into the photo interrupter and trimmed the strip so that the point at which the motor started was just inside the edge of the strip.

I then tape the strip at right angles across the paddle.

Setting the motor speed to 10 and the start speed to 9, I was able to adjust the strip and paddle for a smooth, full-range control.

I'm attaching some photos and a JPG of the gradient. Hope it helps some of you.

[Uwe]

So you print the gradient on normal paper and then attach it to the clear plastic just for stiffness, right?

[TomG]

Yup. And I just noticed that I didn't upload the gradient. Here you go.

[Wizcrafts]

Tom;

You must be using one of the old style push button servo motors.

[TomG]

Hey Wiz. Push button? It's a Consew CS1000. It does have the up/down arrows and you set the start speed, normal reverse direction and max speed with the S.1, S.2 and S.3 settings. Is that what you're referring to?

[Wizcrafts]

Yeah, that's the old style I used to have. I finally replaced it with the Family Sew FS-550s, from Toledo Industrial. It has a rotary switch to limit the speeds. Newer models have a pot instead of a switch. There is a whole topic about mods others have made to these motors and yours.

Did you know that Cobra Steve makes variable density attachments for push button control servo motors?