Ok, my Obsessive-Compulsive disorder has kicked in over a servo motor with needle positioning.
From what I've found online the needle positioner is a synchronizer which affixes to the handwheel. The gentleman that I spoke to at Toledo Sewing said that sometimes the handwheel needs to be drilled and tapped in order to accomodate the synchronizer.
The machine on which I want to install the servo and positioner has a built in bobbin winder. When I wind a bobbin I release the clutch in the handwheel (just like a domestic machine).
Is this going to make a difference when it comes to the needle positioner? Can anyone give me some details on the needle positioner?
And yes, I will call Bob Kovar when I'm ready to purchase the motor. For now I'm trying to wrap my brain around the positioner.
Thanks,
Jeremy
The two machines I have with servos and needle positioning came from the factory with the set up. They weren't retrofitted. One in a Juki 9010SS and the other is a Juki 1541N7. I've never changed out a clutch motor for a servo, so don't much about "after market" set ups.
maybe chris will comment on his retro fit, if and when Id retro fir my clutch motor and id lke this neddle down on stop. does something stop the handwheel not just the motor stopping.
chris do yours have this stop feature?
Just being curious which machine are you considering, a picture or model would be super. I can understand what Bob or Bobby has mentioned, heres a basic im thinking. The shaft on or thru the machine pulley has to in someway mount a bearing, it is tapped or screwed on centered. It uses the bearing feature to house a sensor which ie ( watches a couple dots go round n round on the pulley shaft) this housing has the ability to stay free and not spin around and winding the cord all up.
Anyway within this picture there would be the dots one being top needle position and the other bottom needle positon, just a measurement for your selected button and or present foot position. that it in a nuts shell, now this has to allow the continued use of bobbin winding as you mentioned. I would take a couple pictures and be able to send them to Bob for review.
Anything can be done but im positive he will calmly say if you should continue with the option or not.
Now any questions regarding sewing im lost and all ears listening to the pros, having no clues on this craft yet.
Hope this helps a bit Good Day
Jeremy,
Can you give me the make & model?I really doubt if it will fit because there's an adapter flange that needs to mount on the end of the handwheel,it won't fit on your knob.
Bob
Here are pics of my machine. It's a Bernina 950 Industrial. The hand wheel is approximately 3" in diameter and the hand wheel release is approximately 1 3/4" in diameter. If the needle positioner won't fit I'll still go with a servo motor.
(https://forum.upholster.com/proxy.php?request=http%3A%2F%2Fi1253.photobucket.com%2Falbums%2Fhh586%2Fddandj1%2Fth_IMG_0782.jpg&hash=5e2c0a8195e499665a1a51d6e33f6d00) (http://s1253.photobucket.com/user/ddandj1/media/IMG_0782.jpg.html)
(https://forum.upholster.com/proxy.php?request=http%3A%2F%2Fi1253.photobucket.com%2Falbums%2Fhh586%2Fddandj1%2Fth_IMG_0781.jpg&hash=7e3ebdb1c12ab6207bac789789676c6a) (http://s1253.photobucket.com/user/ddandj1/media/IMG_0781.jpg.html)
Yes,you won't be able to mount the sensor on this machine with the type of knob on it,but a servo will still fit & work a lot better than a clutchmotor.
Thanks for the clarification, Bob. I'll be in touch soon to order that servo.
Jeremy
I ordered a new bench top for my W&G overlock and a servo motor to replace the original clutch motor. I asked about needle positioning and was told the needle positioner has to fasten to the hand wheel so it can relay the needle's position back to the motor. Because my overlock chains off, the needle positioning feature is not as important as it would be on a lockstitch machine.
I'm looking forward to the quiet servo that can be turned on in the morning and turned off in the afternoon, rather than the noisy on/off routine of years past! (also looking forward to the nice clean bench top and the installation of the new thread stand!).
Bobbin:
Your going to love the servo. I cannot see how some can stand the humming of a clutch motor all day. But then I guess if you cut your teeth on clutch motors then you get used to the noise.
I am going to suspect your going to also enjoy the reduced electric bills. :)
I love my servo's.
Chris
I have a servo with needle positioner and i'd never go back to a clutch motor .
heres a vid of my machine and an idea of how controllable it can be
you have to kind of ignore the air operated foot lift :-)
http://youtu.be/IufU5xhGfB8
Hi Bob How much for a servo motor with a speed dial for my 563 juki
thanks Mike From Livonia MI.
Fragged, does your machine allow you control the "step" pneumatically, too? I have basically the same set-up on my Juki, but I have to adjust the step with a dial atop the machine. I've been thinking of adding the pneumatic adjustment.
Quote from: Therapy on October 08, 2013, 04:32:59 am
Hi Bob How much for a servo motor with a speed dial for my 563 juki
thanks Mike From Livonia MI.
$110.00 + shpg approx $15-20.00
After some delay in delivery my overlock machine has been converted from a clutch motor to a servo. I should have done it years ago! It's quiet, responsive, and I love it. It's an "Enduro" and it has an option called "soft start" that allows you set the motor to start off slowly rather than just taking off full tilt. I didn't have it set for that but do any of you with servos have/use that option?
I don't have any type of "slow start" feature on mine. But at the lowest speed setting, I can certainly go as slow as I want to.
Are you saying that with "slow start", you can start off slowly, and then "ramp up" to full blast without re-setting the speed control?
Yeah, that's pretty cool, huh? Mine doesn't seem to have a dial that allows speed adjustment, it appears to be accomplished by adjusting the speed on the digital setting (I didn't ask about that!) but for my purposes I'm not sure it's that important since this is an overlock machine. I'll have to spend some quality time with the manual.
On my servo I can adjust how long it takes to go from 0-100% when you step on the pedal. I didn't like the delay at first, but after trying a bunch of settings, I found a setting that I like. Just a little tiny bit of delay, makes it really easy to go one stitch at a time, in places where I'd walk the machine by hand before. Between this and the needle positioning, I very rarely touch the hand wheel anymore. I like it.