Swapping clutch motor to servo motor, please assist

[Ana1234]

Ok thanks!! Did you buy a speed reducer by any chance that you installed with the servo? 

[kgg]

42 minutes ago, Ana1234 said:

I'm just starting out so I'm on a budget as well. 

We all have to start somewhere and as your needs / wants / ability changes you will probably either replace or add another machine. Being new to this venture or should I say addition I would get the 550 watt servo motor and not bother with getting the speed reducer for now. My reasoning is that I think you will find that just changing to a servo motor from a clutch motor you will be able to control the sewing speed fairly easily.

The advantage is that you will very quickly figure out the sewing ability of the machine without the worry of over torquing the machines internals because of the additional torque (punching power) that the speed reducer will give you. Try some simple sample items in fabric and then leather. Give yourself a month to figure out the basics and quirks of your machine. Figure out how thick of what materials the machine can handle, best thread size to needle combination in different material of different thicknesses and what type of accessories that would make your projects easier like presser feet, binding / folding attachments etc.

If after a month you are still struggling with the sewing speed and not what the machine can punch through then add a speed reducer. If you are unable to sew certain projects chances are the machines internal parts weren't designed to handle them and forcing the machine to do so by adding a speed reducer then nasty / expensive repairs are probably going to happen. The 750 watt servo motor I think is more suited to the upper end of machines in the upholstery class like the Juki  DNU-1508 (and clones) and the 441 class machines like Juki TSC-441 (and clones). 

kgg

 

[xnikolaos]

Νo. No need for a speed reducer when using a 45-50mm small pulley servo motor (photos). You can manually operate the sewing machine (Hand crank) if you want an even lower speed. I will make a reducer for my pleasure (photos), from cheap Chinese materials, but it is not necessary. I can punch 5mm, chrom tanned leather at lowest speed (100-200Rpm) with easy, with 750watt chinese noname servomotor.

Edited July 4, 2023 by xnikolaos

[dikman]

kgg offered some good advice. Start simple, get the best value servo you can (doesn't matter if it's 550w or 750w, either will work) and go from their. If you have some mechanical skills, which I suspect you have, then you should be able to fit a servo yourself, it's not difficult. Get some help to remove the clutch motor, though - unless you lift weights.

[Ana1234]

10 hours ago, xnikolaos said:

with 750watt chinese noname servomotor.

What is this no name about? I went to the local sewing shop to take a photo of a servo motor. Owner whom is not at the shop currently said I should wait for him to get back as he has a servo motor in stock for me. I went there to check the brand to do some research but they could not give me a number, name or anything??! They took out a box but didn't open it for me or tell me any specs of the motor (other than that it is a 750w motor). Found that shadey... 

[Ana1234]

7 hours ago, dikman said:

- unless you lift weights

I do  but I'll get some help anyways. Mechanical skills I have non! But in the times we live in you can learn anything if you have wifi 

 

Edited July 5, 2023 by Ana1234

[Ana1234]

10 hours ago, xnikolaos said:

I can punch 5mm, chrom tanned leather at lowest speed (100-200Rpm)

Then the Vevor is to fast? It starts on 500rpm?!

[Ana1234]

10 hours ago, kgg said:

If after a month you are still struggling with the sewing speed and not what the machine can punch through then add a speed reducer

OK! I'll go with this option then. You guys mentiond in the beginning that I should do both at once but I guess problem solving runs it's course and it takes time to get to the right decision. It's good though as I have learnt a lot! 

[kgg]

14 hours ago, Ana1234 said:

They took out a box but didn't open it for me or tell me any specs of the motor (other than that it is a 750w motor). Found that shadey... 

With some of the generic / no name / unbranded equipment like for servo motors the information isn't included other then the very basic. Technical information like how many coils the motor is constructed with or the torque rating probably will be non existent.

kgg

[xnikolaos]

Chinese companies sell their products in Europe without any warranty but in consultation with the buyer. They do not have a representative office in any European country. The sale is almost illegal in the European Union. The selling store is obliged to give a guarantee of at least one year for the products it sells.