New to me Consew

[jrjr2u]

So how does this sound... 206rb4, Family sew servo, 2" motor pulley, change the hand wheel to a 5" pulley.

I will tinker with the clutch motor first. Have a couple ideas which include extending the lever on the motor.

 

Edited June 2, 2019 by jrjr2u

[kgg]

54 minutes ago, jrjr2u said:

So how does this sound... 206rb4, Family sew servo, 2" motor pulley, change the hand wheel to a 5" pulley. 

If you assume the servo can turn at the 100 rpm setting under load then the 5" pulley will turn at 40 rpm, 6" pulley would turn at 33 rpm, 4" pulley would turn at 50 rpm. A more realistic servo motor setting would be at least 200 rpm which would change the numbers to:

4" pulley would turn at 100 rpm

5" pulley will turn at 80 rpm

6" pulley will turn at 66 rpm

1 hour ago, jrjr2u said:

I will tinker with the clutch motor first. Have a couple ideas which include extending the lever on the motor.

Extending the clutch engagement lever will give you better speed control, be a bit more forgiving and make feathering easier but nothing for speed reduction. For speed reduction you would need to install a speed reducer pulley between the clutch motor pulley and the sewing machine pulley.

kgg

[dikman]

Fitting a larger pulley in place of the handwheel is actually a very good option in place of a speed reducer (not quite as effective but works well). It's something I do with my machines. I didn't mention it because I didn't want to confuse you. While Wiz is correct about the "push button" servos, in practice it's not an issue for me as I run a 45 mm pulley on all my motors, larger pulleys in lieu of the handwheels and a reducer on a couple as well (one machine will do one stitch every 2 1/2 seconds!!). My aim is to give slow controllable feeds, and while it works for me probably won't suit the more competent users.

[jrjr2u]

1 hour ago, dikman said:

I didn't mention it because I didn't want to confuse you.

I don't confuse easily

1 hour ago, dikman said:

While Wiz is correct about the "push button" servos, in practice it's not an issue for me as I run a 45 mm pulley on all my motors, larger pulleys in lieu of the handwheels and a reducer on a couple as well (one machine will do one stitch every 2 1/2 seconds!!). My aim is to give slow controllable feeds, and while it works for me probably won't suit the more competent users.

Do you have a setup like I described with no speed reducer inline and only the 2 pulley changes on a digital (push button) brushless motor?  I'm sure that's not one that gives the 2.5 second stitches.... but does it do one second with torque if you do?

Regarding this Family Sew servo motor, I have read where it performs well at start up and then in another post its lacking torque at startup. Don't quite know what to make of it all without buying and trying. That can get costly. I have spent many hours researching this with no clear answer but it is what it is I guess.

[SARK9]

First, congrats on the 206RB-4 deal, that is a nice looking machine.

To add a dissonant note, on the subject of "push button" servos, I must say that I have used nothing BUT the Consew servers for a number of years. These "push-button" servos all seem to be "branded" to suit and essentially made under the same roof, as far as appearance goes. The Consew branded servo has undergone quite an evolution since I got my first one, with enough minor AND major changes to merit a revision number, yet all of the later models are still called "CSM-1000".  Here is a quick snapshot of the variations that I personally have bought, which is probably not all inclusive. All but the CM were advertised by various vendors as Consew CSM-1000.

I still use 3 of the CM-1000's with the optical gradient speed controller, and I've had 2 others which left with the machine I installed them on. None gave me any problems, but you did need to do some mods on the controls for the best results. All the other CSM-1000 types seem to use a Hall effect sensor, which tends to start more abruptly. The latest ones I've purchased that have 4 buttons and a 4 character display seem to be better in that regard. For my use, the lowest initial-on speed seen with almost any of these is not sufficiently into the motor's power band to use on heavy materials as installed. I only use direct drive pulleys on machines sewing moderate fabric and set the RPM to the max rated speed of the individual machine, which some of these motors can easily exceed. All of the machines which see thicker material like my Juki 563, Consew 206RB-5, Seiko SK-6, and the Mitsubishi cylinder arm have speed reducer pulleys fitted.   I've yet to have one of these motors "go bad" myself.

All of the clutch motors which came with any machines I bought in used condition have been discarded as scrap. I don't do repetitive piecework in a garment factory, and I really find the buzzing and the various "personalities" of these 40lb. watermellon sized relics pretty annoying. If I need 3000SPM, I get it easily. The garment factories still in business have been retiring clutch motors with various new machines using REAL servo type motors with electronic clutches and other automated pneumatic or solenoid actuated functions since forever, and lately, with the direct drive electronic motor very similar to the retail push-button servo in many ways. 

-DC

[jrjr2u]

18 minutes ago, SARK9 said:

To add a dissonant note, on the subject of "push button" servos, I must say that I have used nothing BUT the Consew servers for a number of years. These "push-button" servos all seem to be "branded" to suit and essentially made under the same roof, as far as appearance goes. The Consew branded servo has undergone quite an evolution since I got my first one, with enough minor AND major changes to merit a revision number, yet all of the later models are still called "CSM-1000".  Here is a quick snapshot of the variations that I personally have bought, which is probably not all inclusive. All but the CM were advertised by various vendors as Consew CSM-1000.

 

Thanks for the reply!

I have yet to find a csm1000 with 4 buttons and 4 place display. Where did you find that?

[SARK9]

10 minutes ago, jrjr2u said:

I have yet to find a csm1000 with 4 buttons and 4 place display. Where did you find that?

I've bought 2 of them in the last 18 mos or so. I'll have to check the receipts to see which was the Consew, and which was the generic "Rex". I know you do NOT want the one character display version. I surfed around until I saw the picture of what was being offered, taking note of the display.

-DC

[jrjr2u]

1 hour ago, SARK9 said:

I've bought 2 of them in the last 18 mos or so. I'll have to check the receipts to see which was the Consew, and which was the generic "Rex". I know you do NOT want the one character display version. I surfed around until I saw the picture of what was being offered, taking note of the display.

-DC

I found one, but with an odd name

https://www.amazon.com/Mophorn-CS1000-Machine-4500RPM-Industrial/dp/B07HFTMR8Z/ref=sr_1_1?keywords=cs1000+servo&qid=1559525019&s=gateway&sr=8-1

Edit-
And another.... not sure about these brand names ya know?
https://www.ebay.com/itm/Eagle-EA-550-Brushless-Sewing-Machine-Servo-Motor-W-Needle-Positioner-550-Watts/401551596108?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m1438.l2649

 

Edited June 3, 2019 by jrjr2u

[dikman]

That first one looks exactly the same as the last one I bought (locally) right down to the position of the power switch. Works fine, but I couldn't get it slow enough for my needs even with a 7" pulley on the head unit and a 2" on the motor, so I made a reducer as well with  2" and 5" pulleys. This is the one that now does 1 stitch every 2 1/2 seconds.

My Pfaff 335 has a 10" pulley and a 2" on the motor, using a Skyrit motor and that works well at sewing slow. There are photos in my other posts somewhere. They're all brushless motors.

[jrjr2u]

After much consideration, research, and communications I ordered these:
Servo
https://www.amazon.com/gp/product/B00ZIYZYAY/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1

Pulley for the handwheel
https://www.amazon.com/gp/product/B0000DD41M/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1

If I need to I will install a speed reducer but I think this may get me to an acceptable state.

Thanks everyone for your input! I will post back with the results.