Leather sewing servo motor

[Lebowski]

I have a Chinese leather shoe patcher. I got it running great, but now need two hands for some of my projects. Researching servo motors has been a pain. What I need is what everyone else needs, high torque low speed but there’s a lot of conflicting information. A lot of guys on her talk about the consew, kindyne but I’m not finding a lot of information on build quality or good videos that show case the low speed with thick material. 
 

The only machine I’d feel comfortable buying would be the sailright workhorse. Has 12 coils which from what I understand is important for torque and the smoothness in ascending speed. The SQ6000 seems similar but has a higher rpms which I don’t need but also seem unnecessary if the point of the machine would be high torque.

Why do some guys care about coils and others think less of it?

I understand I’ll have to have a speed reduction system regardless, because my goal is to sew at hand crank speeds, but the closer the motor is to preforming at low speeds with high torque is best for me. 

if you would recommend the best leather work servo motor for hand crank speed with real punching power that would be great. 

[DieselTech]

I would look into the kinedyne hm-750SL Model.

[kgg]

7 hours ago, Lebowski said:

Why do some guys care about coils and others think less of it?

The more coils the servo motor has the better the the low end torque range and lower startup speed. A lot of the six / nine coil servo motors have a higher startup speed. A speed reducer between the servo motor and the sewing machine will help to smooth out the startup speed on the six to nine servo coil motors. The Sailrite Workhorse at $225 USD or $321 CAD plus you can count on at least another $150 for taxes / brokerage / shipping is the same as the Reliable 6000 at $259 CAD plus 13 percent tax and whatever the shipping cost within Canada.

Are you planning on putting the servo motor on a $100 Chinese Patcher or the Singer 29K Patcher clone machine?

kgg

[Dwight]

You want to call Bob  . . .

Toledo Industrial Sewing Machines Ltd.

 

Sewing machine repair service

 

3631 Marine Rd · (419) 380-8540

 

He'll give you the straight info . . .  he is one of the advertisers here in the top banner . . . 

 

May God bless,

Dwight

[Lebowski]

1 hour ago, kgg said:

Are you planning on putting the servo motor on a $100 Chinese Patcher or the Singer 29K Patcher clone machine?

Yes. I will probably upgrade so my thinking is get the best servo motor now. The goal is two hands, I just want more control with the same punching power I have with my hand crank.

I found a shop in Victoria bc that sells the sq6000 for 170 cad. I went in person and it’s legit. I’m just wonder if the sq6000 can do what the workhorse can, considering it has 1500 more rpms which make me question the low end speed/torque of the sq6000.

 

 

[KYCat]

33 minutes ago, Dwight said:

You want to call Bob  . . .

Toledo Industrial Sewing Machines Ltd.

 

Sewing machine repair service

 

3631 Marine Rd · (419) 380-8540

 

He'll give you the straight info . . .  he is one of the advertisers here in the top banner . . . 

 

May God bless,

Dwight

Agree. Bob was very helpful in getting my Cowboy 3500 up and stitching. Good dude. 

[GerryR]

The Enduro Pro SM645B works great and some are still available on Ebay: https://www.ebay.com/itm/165684311695?_skw=Enduro+Pro+SM645b+Servo+Motor&epid=13016686151&itmmeta=01JGY3XPK9NY4B3Z35ZZCGZ4SS&hash=item26938df68f:g:dZIAAOSwqQxjKLg4&itmprp=enc%3AAQAJAAABAHoV3kP08IDx%2BKZ9MfhVJKnxM8bHb2nR%2BJ%2FSCjzhhIMTOULdd6EPTSJRQBXqH%2BsDVi4fG27BJC4xYoVBLOb5HtlrEtMOGz6qYegfF%2BJhqzFOMUOR6aQNw2N%2B5ZWhEOs4mcEw0nhh0gMRmlkhx4R6EDo2x6%2B%2BdaAgC5feSOQzJ0UKq9PyUKaowiDGRuL1zX0lHEp2tZR7iVv%2F79d84Ts1fY1WSmgP1t0eY49l5JbjoLukq3PILT%2FlRtGaSmog5rJrHP%2FWhkNIGmAurvrKBxHB8F%2Ba12JbKeI03LcqDnLOX%2B5DowXu0%2F7PvEADktc6W5uJL9CFiXsO7LPXKr8PONanCcU%3D|tkp%3ABk9SR9rp9sOHZQ

I have motorized a couple of the Chinese Patchers and they work fine.  Not trying to sell you anything, but if you want some ideas on how to set one up, look at my "for sale" ad here: 

This one runs on 220VAC, but I'm told they also work on 120VAC;  I've never tried it as I have 220VAC readily available.  The patchers readily go thru 20 oz. leather (5/16" thick), as you are probably well aware.

Hope this helps.

[GerryR]

19 minutes ago, Lebowski said:

Yes. I will probably upgrade so my thinking is get the best servo motor now. The goal is two hands, I just want more control with the same punching power I have with my hand crank.

I found a shop in Victoria bc that sells the sq6000 for 170 cad. I went in person and it’s legit. I’m just wonder if the sq6000 can do what the workhorse can, considering it has 1500 more rpms which make me question the low end speed/torque of the sq6000.

 

 

You will probably want to drastically reduce the output by a speed reducer.  Most of the servo's have good low speed torque, but you don't need the high speed, so by using a reducer, you gain more torque and have much better speed-range control via the foot pedal.

[kgg]

1 hour ago, Lebowski said:

Yes. I will probably upgrade so my thinking is get the best servo motor now. The goal is two hands, I just want more control with the same punching power I have with my hand crank.

If you are planning on upgrading your machine keep in mind if you buy new they will typically come with a servo motor and if buying used you could buy a servo motor at that time if it has an old clutch motor installed. The only way you are going to get the speed control and punching power is with a speed reducer which will cost about $150 CAD. An off the shelf speed reducer may not still get the speed down to your liking so you probably will have to make your own.

I would suggest you consider putting that money towards upgrading your machine first.

 

1 hour ago, Lebowski said:

I’m just wonder if the sq6000 can do what the workhorse can, considering it has 1500 more rpms which make me question the low end speed/torque of the sq6000.

The top end rpm speed isn't the main concern it is the initial startup rpm speed that you should be focused on. The brushless servo motors which have coils instead of brushes and a have a electronic control box like the Sailrite and Reliable have a typical startup speed of 500 rpm's. The servo motors that have brushes and typically just a manual speed dial mounted on the motor have a typical startup speed of about 200 rpm's. I personally like the brushed servo motors, which are becoming more uncommon, are easier to figure out / repair if there is a problem. With either style of servo motor you can get initial startup jump/jerk but a speed reducer would help smooth that out.

kgg

[Lebowski]

6 hours ago, GerryR said:

You will probably want to drastically reduce the output by a speed reducer.  Most of the servo's have good low speed torque, but you don't need the high speed, so by using a reducer, you gain more torque and have much better speed-range control via the foot pedal.

Yup i think that’s the play 

[Lebowski]

5 hours ago, kgg said:

f you are planning on upgrading your machine keep in mind if you buy new they will typically come with a servo motor and if buying used you could buy a servo motor at that time if it has an old clutch motor installed. The only way you are going to get the speed control and punching power is with a speed reducer which will cost about $150 CAD. An off the shelf speed reducer may not still get the speed down to your liking so you probably will have to make your own.

I would suggest you consider putting that money towards upgrading your machine first.

 

5 hours ago, kgg said:

If you are planning on upgrading your machine keep in mind if you buy new they will typically come with a servo motor and if buying used you could buy a servo motor at that time if it has an old clutch motor installed. The only way you are going to get the speed control and punching power is with a speed reducer which will cost about $150 CAD. An off the shelf speed reducer may not still get the speed down to your liking so you probably will have to make your own.

I would suggest you consider putting that money towards upgrading your machine first.

Lots of great info. Didn’t realize the price of a speed reducer. Thanks

[nejcek74]

another thought: use needle synchronizer

I have a 750W servo motor (brushless) with electronic control box and external synchronizer on the sewing machine. I don't know how many coils it have, it was the upgraded version, but it could be just a PR thing. The low speed is 100 rpm but what actually makes it great is the synchronizer. Pedal down > needle down, pedal up > needle up. There is no problem with speed as I can go step by step when I need it. The needle is always in the perfect position, when the loop is already made (down) or when the thread is unlocked and good to move (up). I used one table with the motor with different machines, each has it's own synchronizer fixed.