Servo motor speed limiter

[JeffHami]

I purchased a Consew CSM1000 Servo Sewing Machine Motor and it is working great on my Singer 153W 100 but I would like to install a speed limiter. While working on Christmas presents for the grandkids my wife got out her sewing machine to help me do so light sewing. She was showing me how she could set her machine to turtle mode and no matter how hard she pressed on the foot pedal it would still go slow. I was thinking it should be easy to put a speed limiter inline between the speed controler and the motor. This way you could set the max speed and if your foot slipped it would not speed up and mess up your work. I'm no electronics guys , but this seems like something that could be made.   Is there a reason this couldn't be done?

[KingsCountyLeather]

I’d be interested in knowing the answer to this question too.

[brmax]

You might have to get an additional speed reducing pulley setup, or try some of the speed options on your setup

Good day

Floyd

http://www.consew.com/View/Consew-Model-CSM1000

Edited January 1, 2018 by brmax

[Uwe]

You'll have to press a few buttons to select a top speed the motor is allowed to spin at. The Consew CMS1000 manual will tell you the details. "Read manuals" sounds like a great new year's resolution. 

 

[JeffHami]

The unit only allows for a minimum speed of 500 rpm. When I  press lightly on the pedal and get a nice slow speed that works well and is easy to keep up with, but it's hard to keep your foot in that position. I would think I could some limiter inline that would not allow the unit to go over that speed. 

I was thinking about having a large pulley made that would slip of the original pull and locked in the place with two set screws that go into the original belt grove. 

[Wizcrafts]

You could buy a 3:1 speed reducer and a couple of new v-belts. This would divide the motor speed by 3 and multiply the torque by the same ratio.

Alternately, if the motor pulley is over 2", see about replacing it with one that is under 2" diameter. If the original pulley is 4", a 2" pulley will cut the speed in half and double the torque. A shorter v-belt will be needed for a smaller pulley.

[Constabulary]

wow min. 500 rpm is quite a lot - my servos start at 200 rpm but they are made by JACK (or labeled JACK). and I run them with a 3:1 pulley speed reducer. I´m not electronic guy and I´m not sure if an additional electronic speed limiter would work at all in combination with a servo motor.  However I once added a quite simple speed controller to my electric bobbin winders - but not sure if this works in combination with a servo motor.

 

I think a pulley speed reducer would be the better idea as it even increases the torque. You probably have seen this video already on YT:

 

 

Edited January 2, 2018 by Constabulary

[JeffHami]

12 minutes ago, Wizcrafts said:

You could buy a 3:1 speed reducer and a couple of new v-belts. This would divide the motor speed by 3 and multiply the torque by the same ratio.

Alternately, if the motor pulley is over 2", see about replacing it with one that is under 2" diameter. If the original pulley is 4", a 2" pulley will cut the speed in half and double the torque. A shorter v-belt will be needed for a smaller pulley.

Wiz,

 Where so I buy this 3:1 speed reducer? Does it mount under the table and do I have to move the current position of the motor?

 

The unit has a 3" pulley

Jeff

Edited January 2, 2018 by JeffHami
updated info

[Wizcrafts]

1 minute ago, JeffHami said:

Wiz,

 Where so I buy this 3:1 speed reducer? Does it mount under the table and do I have to move the current position of the motor?

 

Jeff

All of the sewing machine dealers who advertise (top banners) with us have these speed reducers, as well as type 3L v-belts and different sizes of motor pulleys for various diameter shafts. The reducer has a mounting bracket that screws into the bottom of the table, next to the cutout for the belt. You feed one belt to from the motor to the large pulley and another longer belt up from the smallest reducer pulley to the machine pulley. The motor's positioning adjuster bolt is used to set the slack in its belt. The reducer mount has bolts that let you move it vertically a little to tension the top belt.

[JeffHami]

18 minutes ago, Constabulary said:

wow min. 500 rpm is quite a lot - my servos start at 200 rpm but they are made by JACK (or labeled JACK). and I run them with a 3:1 pulley speed reducer. I´m not electronic guy and I´m not sure if an additional electronic speed limiter would work at all in combination with a servo motor.  However I once added a quite simple speed controller to my electric bobbin winders - but not sure if this works in combination with a servo motor.

 

I think a pulley speed reducer would be the better idea as it even increases the torque. You probably have seen this video already on YT:

 

 

Just watched it thanks. I think I may go with this idea.