Having Problems With Servo Motor Speed Control?

[SooperJake]

If I recall correctly, the problem was the machine hit top speed right off...there was no way to tweek the speed at the pedal, is that right?

So what did the fix consist of?

Jake

Edited August 31, 2012 by SooperJake

[particle]

That's correct - the switch was variable, but the entire range of speed was regulated within just a fraction of an inch. The fix is a very minor modification (addition) to the light-blocking blade inside the switch via a printed sticker with a gradient printed on it. Very simple fix that works very well. I sewed another batch of holsters with it last night and couldn't be happier with the fix and the machine itself.

[Bobby hdflame]

That's correct - the switch was variable, but the entire range of speed was regulated within just a fraction of an inch. The fix is a very minor modification (addition) to the light-blocking blade inside the switch via a printed sticker with a gradient printed on it. Very simple fix that works very well. I sewed another batch of holsters with it last night and couldn't be happier with the fix and the machine itself.

I've had a chance to play with mine just a little and speed control is great.

My problem is getting my EPS to work correctly. It may be something I'm doing wrong. I'll be calling Steve shortly to get him to help walk me through it.

As soon as I get me and the Cobra in sync, I'll try and take some video of the excellent speed control I have with it.

[SooperJake]

I've only had it for a week, but I don't think the Cowboy's controller works the same way. I can lay the side of my foot on the pedal, and "press" the air with my big toe ( barefoot) and the machine will creep. I can move the needle through its stroke in 1/4 " or so increments. Speed on the readout is 1600 rpm.

Jake

Edited August 31, 2012 by SooperJake

[KAYAK45]

Jake, don't feel bad. I think this "solution" gives the Cobra guys what the CB 4500 already had. That's why we just don't understand. We did'nt/don't have the same problem.

Just smile and go on.

Kevin

[Trox]

Thank you Steve and Tom in the house of the Cobra, mod recieved and motor works very well.

Happy sewing.

Trox

[KatRides]

Mine is controlled electronically, no black knob there :0(

turns out the computer board needs replacing.

Artisan is in the middle of a big relocation move so Gerry will be tough to reach if anyone is interested.

Yeah, on mine there is a little black knob. You turn it to control the speed. It's an ESM 400-2 motor.

[bullrope braider]

If I recall correctly, the problem was the machine hit top speed right off...there was no way to tweek the speed at the pedal, is that right?

So what did the fix consist of?

Jake

interesting post, like some others here I thought it was normal for my Cobra to just take off right away even though I was easing into the pedal. looks like I'll contact Tom about my EPS motor about this mod, It'll sew slow but I cant get the slow crawl I need going around corners or turns and is making me miss my stitching lines. also with this EPS needle positioning system to get it to stop needle down takes a heel tap on the pedal, if I just take my foot off the pedal it'll stop needle up. is that right?

[Trox]

Hi Mr. Bullrope braider,

I do not have the EPS Cobra motor, I do have three Efka position motors and the regular Cobra servo. It has the same manual (Instruction sheet) as the EPS.

You should be able to choose what position your needle stops in.

Turn on your motor and sew a couple of rotations (might not be necessary).

When it stops press the up button (near the motors led display), the display then shows ” POS. u”, then press the down button and the led will show ” POS. d”.

Your needle will now stop down as it should do, with a heel back it will return to up position.

If the motor is a bit quick to accelerate you can try to adjust the ”slow startup speed” (the acceleration time on the motor from 1 to 9)

Turn on motor and press down button for several seconds until led shows ”SET.1”, then the up button once; the led shows ”SET.1”, then press the down button. The number in the display now shows your startup speed (acceleration speed, default value is 6). You can now adjust the speed with the up and down buttons, 1 is fastest and 9 slowest. This function might not work after you have done the modification, before installing the mod. try out this function first.

Good luck.

Trox

interesting post, like some others here I thought it was normal for my Cobra to just take off right away even though I was easing into the pedal. looks like I'll contact Tom about my EPS motor about this mod, It'll sew slow but I cant get the slow crawl I need going around corners or turns and is making me miss my stitching lines. also with this EPS needle positioning system to get it to stop needle down takes a heel tap on the pedal, if I just take my foot off the pedal it'll stop needle up. is that right?

[bullrope braider]

Hi Mr. Bullrope braider,

I do not have the EPS Cobra motor, I do have three Efka position motors and the regular Cobra servo. It has the same manual (Instruction sheet) as the EPS.

You should be able to choose what position your needle stops in.

Turn on your motor and sew a couple of rotations (might not be necessary).

When it stops press the up button (near the motors led display), the display then shows " POS. u", then press the down button and the led will show " POS. d".

Your needle will now stop down as it should do, with a heel back it will return to up position.

If the motor is a bit quick to accelerate you can try to adjust the "slow startup speed" (the acceleration time on the motor from 1 to 9)

Turn on motor and press down button for several seconds until led shows "SET.1", then the up button once; the led shows "SET.1", then press the down button. The number in the display now shows your startup speed (acceleration speed, default value is 6). You can now adjust the speed with the up and down buttons, 1 is fastest and 9 slowest. This function might not work after you have done the modification, before installing the mod. try out this function first.

Good luck.

Trox

thank you, I printed this out and will give it a shot here shortly

on edit: didnt take but a couple minutes to fix the needle position. thank you for your help. also the speed is re set now so it's not haulin it when I step on the pedal. thanks again

Edited September 17, 2012 by bullrope braider