Moderator Wizcrafts Posted November 21, 2017 Moderator Report Posted November 21, 2017 On 11/21/2017 at 5:34 AM, CowboyBob said: Wiz,do you notice a difference in the way the slow speed operates as you push on the pedal?Also did the brushless ones you have make a noise? I am guessing that the first part of your question is referring to the Family Sew motors. If so, yes, there is something about the way the control lever is fastened to the shaft that controls the speed that makes the motor begin to slow down as you push hard on the pedal to speed up. It might be twisting or deflecting the speed controller inside the case when the chain from the floor pedal is on an angle. I found that I had to rig a large C clamp to the pedestal base to make the chain line up below the control lever to negate this effect. For some reason, some of these motors favor a direct vertical axis pull to achieve the full range of control. Could be the case, or the bearing moving. I dunno. It is only the top speed that is affected by the off-axis pull on the chain. Slow speeds are awesome and I can easily keep the CB4500 sewing at 1 stitch every 4 seconds, if I need to. In fact, when I set the speed dial all the way to the slowest setting, I can floor the pedal and it will sew at about 1 stitch per second. I set it there whenever I sew fishtails onto belts and straps. Answer to part two. Yes, the first brushless (push button) motor did make a slight rattling sound under certain loads and speeds. The last unit was pretty quiet though. I believe it was more powerful. But, it suffered from a sharp ramp up from off to slow. That's why I installed a gradient light beam filter that I got from Steve (as per a YouTube tutorial someone posted). The filter gave the motor really nice slow speed startup control. Unfortunately, there was a slight hiccup at a certain point that I never got rid of. I learned to feather past that dead spot. My current Family Sew motors don't have this problem. I hope this helps. Quote 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.
Members TheRuggedProject Posted November 25, 2017 Author Members Report Posted November 25, 2017 How does one attach a control panel (like the cp-18) onto a machine? I assume it plugs directly into the motor. Would this even work on a vintage machine? Quote
Moderator Wizcrafts Posted November 25, 2017 Moderator Report Posted November 25, 2017 12 hours ago, TheRuggedProject said: How does one attach a control panel (like the cp-18) onto a machine? I assume it plugs directly into the motor. Would this even work on a vintage machine? What are you referring to when you say control panel? Are you referring to the internal electronics, or the external on/off switch box? Or, perchance, to a positioner? Quote 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.
Members R8R Posted November 25, 2017 Members Report Posted November 25, 2017 18 hours ago, TheRuggedProject said: How does one attach a control panel (like the cp-18) onto a machine? I assume it plugs directly into the motor. Would this even work on a vintage machine? Like a Juki CP-18? You would need a motor control to plug it into. Then a motor that works with the motor control. Then a sewing machine that is designed to accept all the do-dads and compressed air fittings to work with the motor and motor control (foot lift solenoids, etc). So...no. One thing that will work with older machines is a motor that has a built in needle positioner function. You add a synchronizer to the end of the handwheel, plug it into the motor and then you can use the treadle in heel up/down fashion to position the needle when you back off the throttle (needle buried at the end of a seam, etc). That's about as fancy as it gets with vintage machines unless you wan to reverse engineer something more elaborate. Quote
Members TheRuggedProject Posted November 26, 2017 Author Members Report Posted November 26, 2017 (edited) 5 hours ago, R8R said: Like a Juki CP-18? You would need a motor control to plug it into. Then a motor that works with the motor control. Then a sewing machine that is designed to accept all the do-dads and compressed air fittings to work with the motor and motor control (foot lift solenoids, etc). So...no. One thing that will work with older machines is a motor that has a built in needle positioner function. You add a synchronizer to the end of the handwheel, plug it into the motor and then you can use the treadle in heel up/down fashion to position the needle when you back off the throttle (needle buried at the end of a seam, etc). That's about as fancy as it gets with vintage machines unless you wan to reverse engineer something more elaborate. Oh, I see. Thank you, I was just curious if it was possible. Has anyone added a pneumatic foot lift to a vintage machine? Or does that also require a new machine. Edited November 26, 2017 by TheRuggedProject Quote
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