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Posted

Is there any reason one type of motor would be better or worse (clutch/servo) for a skiving machine ? I'd think the sharpener would favor a fast motor (the clutch), but then again the servos are not necessarily slow. Any reason though to ever run one slowly ?

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Posted

YES, there are a couple reasons for one/other. And then NO. I already called my "go to guy" BOB @ TOLEDO, about your same question. Go clutch! Cost..lots of options from people switching to servo. No need for speed control on a skiver.

Everybody else wants to SLOW.. a clutch for sewing..a skiver works better at higher speed. Put on BIGGER pully and get the correct speeds for less dollars on the skiver.

A Servo, on the other hand, does not use a lot of power when not in use. A real plus.

So.. if you do not want to turn it on/off use a Servo. If you want to use it wisely and cost is a factor, use a used clutch.

My answer was to use my older clutch for the skiver and buy more Servo's for sewing!

Kevin

Once believed in GOD and the DOllAR...... Hello God!

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Posted (edited)

..a skiver works better at higher speed. Put on BIGGER pully and get the correct speeds for less dollars on the skiver.

A Servo, on the other hand, does not use a lot of power when not in use. A real plus.

So.. if you do not want to turn it on/off use a Servo.

Kevin

Kevin - I love the idea of less power usage, so I'd be leaning more towards the servo.. plus like you said I could even add a larger pulley if faster is needed (I hadn't thought of that). BTW, I just realizes that the Cobra brand skiving machine uses a digital servo. Thanks for the input.

Edited by CustomDoug

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Posted

You will need a powerful servo motor if you go that route. Get at least 3/4 to 5/6 horsepower. For a clutch motor a solid 1/2 horsepower is the minimum. A 3/4 HP clutch motor is better.

Posted IMHO, by Wiz

My current crop of sewing machines:

Cowboy CB4500, Singer 107w3, Singer 139w109, Singer 168G101, Singer 29k71, Singer 31-15, Singer 111w103, Singer 211G156, Adler 30-7 on power stand, Techsew 2700, Fortuna power skiver and a Pfaff 4 thread 2 needle serger.

Posted

There are different kinds of bell knife skiving machines, that needs different motor solutions. Some are like my Italian Alpha skiving machine; it has tree motors. One for the bell knife, is a continuous run motor; the knife rotate at full speed all the time. One small servo motor for the feed wheel and one big continuous run motor for the exhaust fan. For the models with variable speed on the bell knife you can use a clutch motor and like Kevin said; adjust the speed with the pulleys. Then again it might be some skiving tasks that needs the slow speed control of a servo motor. So you see there is no general answer to this question, you use what suits the application.

Tor

Workshop machines: TSC 441 clone/Efka DC1550, Dürkopp-Adler 267-373/Efka DC1600, Pfaff 345-H3/Cobra 600W, Singer 29K-72, Sandt 8 Ton clicking machine, Alpha SM skiving unit, Fortuna 620 band knife splitting machine. Old Irons: Adler 5-27, Adler 30-15, Singer 236W-100

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Posted

Take the recommendations and learn from our experiences setting up skivers, use a clutch motor. Good half, or like said, 3/4HP motor. Even a very good servo motor that we commonly use on a walking foot machine will not have sufficient power, and like said, speed control of the bell knife is not critical.

Good luck!

Take the recommendations and learn from our experiences setting up skivers, use a clutch motor. Good half, or like said, 3/4HP motor. Even a very good servo motor that we commonly use on a walking foot machine will not have sufficient power, and like said, speed control of the bell knife is not critical. We can to this conclusion the hard way; trial and error on our end.

Good luck!

Industrial sewing and cutting, parts sales and service, family owned since 1977, Philadelphia, Pennsylvania USA, 215/922.6900 info@keysew.com www.keysew.com

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