Changing out a handwheel with a motor pulley

[leecopp]

Hey Guys,

Spotted this cool video  on youtube about replacing the handwheel with a motor pulley and avoiding the speed reducer.  Anyone have experience with this adaptation?

There may be some safety issues , but I dont have long hair and have never got my fingers caught in a spoked wheel.

 

Cheap way to slow down an industrial

 

Happy  Day

Lee

[dikman]

Yep, I did this on two of my motorised machines (photos here) -

It works well.

[Constabulary]

I have seen several well working modifications like this here on the forum. Personally I prefer the OEM hand wheel + under table speed reducer solution for a simple and probably dumb reason. I don´t like the appearance very much - I don´t say one or the other way is the better solution I just like to have hand wheel as it came with the machine. Different strokes for different folks

[Wizcrafts]

I hand wheel all of my machines around turns and belt tips. The thought of hand wheeling a possibly sharp edged washing machine pulley doesn't appeal to me.

[Matt S]

I wonder about the effect of the loss of mass/inertia on the function of the machine. Would a servo motor be able to cope with the uneven resistance on the belt through the stitch cycle?

[dikman]

Constabulary, yes, if you like the "traditional" look on old machines then you definitely won't like this setup!

Wiz, that, of course, is something to be aware of. Careful selection of the pulley is important, if they're pressed steel then not good, but cast pulleys can be smoothed over. In my case(s) they have substantial rims that are smooth. I do a lot of handwheeling and haven't had any issues.

Matt, both machines have 550w servos with small 45mm pulleys and I haven't had any problems (and I tend to sew slow and creep the needle along!)

[DonInReno]

On March 18, 2018 at 0:18 AM, dikman said:

Yep, I did this on two of my motorised machines (photos here) -

It works well.

Dikman,  I like your pulley choice - and honestly I have never liked the feel and function of the factory lu-562/111w hand wheel.  To me it's more comfortable having a deep rim to wrap fingers around.  A double groove pulley seems even better, but I haven't tried one on a machine yet. Lol

[dikman]

Pulley choice came down to what I had handy - big pulleys tend to get expensive here! The one on the Pfaff is heavy enough to act as a flywheel!!! The "hand crank" I bought cheap, it is alloy and had a bit of bad corrosion at one point on the rim so I cleaned it up and gave it a coat of paint. Good enough for a hand crank.

[trash treasure]

On 3/18/2018 at 10:52 AM, Wizcrafts said:

I hand wheel all of my machines around turns and belt tips. The thought of hand wheeling a possibly sharp edged washing machine pulley doesn't appeal to me.

It doesn't have to be painful if you use the right pulley -

Here's the pulley I used on our Singer 111 - It's a Browning sheave that's specifically made for a 3L belt, which means that the belt rides at the top of it's groove, and forms a nice comfy surface for hand wheeling

[luxuryluke]

Interesting solutions to reducing the speed.

Hmm. Maybe one could dip a reel to reel take up reel in plastidip and it would make for a great and aesthetically pleasing handwheel.

In all seriousness, the “servo + gear ratio + machine model” modification formula for leather working is indeed a lengthy topic.