servo enduro Servo motor still too fast

[AmyK]

Lots of interesting information guys! Thank you all so much! 

I've slowed it down quite a bit, and the torque drop off was helped somewhat by turning off the slow start (it wasn't helping much anyhow), but in order to get me into where I want with the speed, I'm still getting some stalling out. 

Sounds like the easiest thing for the non-mechanically inclined might be to replace the hand wheel. Unscrewing a couple wheels and replacing the belt seems doable. Unfortunately, my guy doesn't have any idea how to get a new hand wheel or servo motor pulley. 

I've got a Nakakima 341L (I'm lead to believe its a Juki 1341 clone) and a Enduro SM600-SP. Can anyone recommend a dealer who might have these parts? 

[dikman]

AmyK, unless you're into tinkering with things changing the handwheel may not be a straightforward project. You will not find a larger replacement handwheel, what you have to get is a large pulley with the same shaft diameter as the machine and then ensure it can be locked to the shaft. I have had to drill and tap more than one pulley to lock it to a shaft.

If you're not keen on messing around with the gradient strips in your servo controller I think your best bet will be to sell the servo and buy a new one (I'm not aware of any newer ones that use the optical gradient control like yours). Even if you buy one of the inexpensive generic servos on ebay it should work better than the one you've got, and if you fit a box speed reducer you'll be able to make the needle crawl. If you can handle a screwdriver and spanner you should be able to fit the reducer, or get a friend with a little mechanical ability to help.

[toxo]

Does anyone know the shaft size of a Nakakima 341L?

[shoepatcher]

AmyK,

Is it Nakakima or Nakijima?

[AmyK]

1 minute ago, shoepatcher said:

AmyK,

Is it Nakakima or Nakijima?

Nakajima- though I call it Bruce because I keep saying Nakatomi by accident. 
 

(Die Hard. Nakatomi Plaza. Bruce Willis)

[Kcstott]

with a proper speed control you can thread the machine while it's running. 
Don't try this at home, & Hold my beer & watch this. 
 

 

Edited October 19, 2020 by Kcstott

[Kcstott]

Here's the manual for your servo controller. I'd adjust it way down in top speed about half, and increase the slow starting speed to about 4 or 5. this will give you a ramp up of about 1.5 seconds. I have my Cobra class 4 Cut back to 15 on the max speed. 

http://www.keysew.com/Webpages/Owners&PartsBooks/OwnersBooks/EnduroSM600-1Keyfooter.pdf

[AmyK]

After reading all these replies I have my speed turned down to 3 or 4 and I have the ramp up time turned off to try to help with stalling out. But still playing with it for sure and I appreciate your input. 

[AmyK]

Show off, I’ll drink your beer! Lol

[AmyK]

9 hours ago, Kcstott said:

Here's the manual for your servo controller. I'd adjust it way down in top speed about half, and increase the slow starting speed to about 4 or 5. this will give you a ramp up of about 1.5 seconds. I have my Cobra class 4 Cut back to 15 on the max speed. 

http://www.keysew.com/Webpages/Owners&PartsBooks/OwnersBooks/EnduroSM600-1Keyfooter.pdf

After reading all these replies I have my speed turned down to 3 or 4 and I have the ramp up time turned off to try to help with stalling out. But still playing with it for sure and I appreciate your input. 

Edited October 19, 2020 by AmyK
Mobile. Always mess up quotes.