What servo motor setup to get?

[dikman]

Looks good, and not overbuilt. On one table I had I screwed a piece of angle iron across the underside of the table as I felt the top wasn't stiff enough.

Looks like a target frame on the right of the table?

[Texxut]

I made some stand alone target holders and those are some of the frames I staple my targets to. I enjoy shooting as much as sewing, strange combination no?

[dikman]

Not strange at all. That's how I got into sewing (and industrial machines) I couldn't buy the holsters I wanted so made my own.

[crosscaddie]

On 8/16/2022 at 10:14 AM, Wyowally said:

I have seen some comments on brushed vs. brushless servos but have no experience. Not sure what the true differences are in terms of super slow speed running vs. torque. Some say brushless is the only way to go, yet my brushed CSM550-1 does everything I want on a Singer 111W155 without needing a speed reducer. I did go with a smaller motor pulley. YMMV

 

what size pulley did you change to. Don't they come with 2 " Pulley if you get 550 1 servo from Toledo Industrial Bob ? thanks, bill

[kgg]

54 minutes ago, crosscaddie said:

what size pulley did you change to.

A good way to check what to expect in speed change by replacing the size of motor pulley.

i) Checkout this site and just plug in the values at the top of the page.

Imperial Values:

https://www.blocklayer.com/pulley-belteng

Metric Values:

https://www.blocklayer.com/pulley-belt

ii) If you need / want a speed reducer pulley setup just go farther down the page.

Example:

Change size of motor pulley

1. Motor speed 100 rpm, hand-wheel pulley size  4", motor pulley 3". The hand-wheel pulley will turn at 75 rpm's

Change motor pulley down to a 2" and the hand-wheel will turn at 50 rpm's

So you get a 1/3 reduction in speed.

 

Install a speed reducer pulley:

Motor speed 100 rpm, hand-wheel pulley size  4", motor pulley 3". The hand-wheel pulley speed at 75 rpm's

Speed reducer pulley setup is either a single 6 " pulley and a single 2" pulley mounted a shaft or a 6" 2 step pulley that has a large 6" pulley and 2" pulley molded as one.

1. Leaving the original 3" motor pulley and the hand-wheel will turn at 25 rpm's

So you get a 70 percent reduction in speed by just installing a speed reducer pulley arrangement.

2. If you also change the size of the motor pulley down to a 2" the speed will be further reducer so the hand-wheel will turn at 17 rpm's.

The main question should be what is really a practical reduction in speed. 

I would be interested in knowing what the class 441 machines with a dealer supplied speed reducer installed actually get.

kgg

 

[Wyowally]

20 hours ago, crosscaddie said:

 

what size pulley did you change to. Don't they come with 2 " Pulley if you get 550 1 servo from Toledo Industrial Bob ? thanks, bill

45 mm. It takes a different belt of course. I measured carefully and guessed belt size with the counter guy at my auto parts store. Made a lucky guess. Pulley from AMZ.

[DonInReno]

8 hours ago, Wyowally said:

I measured carefully and guessed belt size with the counter guy at my auto parts store.

You are very lucky to be in an area where parts stores can find something without it being attached to a specific car model!   At our auto zone they literally are not able to understand the 3L belt sizes, not even the assistant manager - finally someone asked the store manager and he had to walk the person back and point to the number….the clerk was still very confused.   Now I just look up the store inventory online and show them the picture.   Lol

Our Napa has three sets of counter guys - guys in the back only work with commercial accounts and probably know more than average.  Then there’s the new guys that work weekends and evening shifts - they literally are no better than autozone.    The best guys have the best shifts and the walk in counter is less busy than the commercial accounts so they are up there - old timers that actually know what all the big books are behind the counter!

The guys at Napa in Lander, WY were great - finding odd bearings and seals was a fun challenge and they really taught me a lot every time one of the big binders came out :-)

[Wizcrafts]

I often find type 3L v-belts at my local Ace Hardware store. They seem to have almost everything a person could want.

[Mekanic]

• Toledo Industrial Sewing Machines: Speed Reducer (4:1)
• GoldStar Tool : 750w Servo
• MasterPro Belt: 7330  (15330) 3/8" x 33-3/4" OC

Speed is VERY controllable at stitch...added Needle Synchronizer also.

 

 

[dikman]

Is the needle synchroniser working ok? Some servo/synchronisers don't work when using a speed reducer.