Wizcrafts

Bob Kovar contacted me from Toledo Sewing Machines. He has exactly the servo motor I described. Huzzah! From 1 stitch per second up, all foot controlled, with a built-in 3:1 reduction gear, yielding 500 rpm max at the shaft, with 3x the torque of a straight servo motor.

I have always had clutch motors on my sewing machines and currently have one driving my walking foot machine. It serves me well, but is hard to control at very slow speeds. It wants to either stop or run, when I want it to tick-tock around curves and strap tips. I am considering buying a servo motor to replace it, but am curious about how they are controlled. I want one that will go from about 1 stitch per second, with the floor pedal backed nearly off, smoothly up to full speed (as per my pulley ratio) with the pedal fully down. It seems that every servo motor I read about is controlled by a pot on the back of the motor, with no mention of the foot pedal having any control over speed (or am I mistaken?). Are there any brands of 1/2 HP servo motors that are speed controlled by the foot pedal, rather than just by a knob on the back of the motor? In other words, behave the same as a clutch motor; from a dead stop at heel down, through variable very slow through medium speeds as you toe down, up to the motor's full speed at full toe down. If so, what are those brands or models and who has the best prices for them? If there aren't any such animals, are the pot controlled motors just switched to full on when you press down of the floor pedal, with the pot determining the one speed at which they run? Do they come to a dead stop when you heel down, like a clutch motor?

Great! I'll take it! How do we get this done on this forum?

I am looking for a discontinued Tandy CraftAid #2940 (I think), of a crouching leopard in a tree. This is a billfold size tracing pattern. If anybody here has one in good condition please let me know how much you want for it. Also wanted is a Midas/Kelly stamping tool #291 (a border design about 1/2" x 1/8"), as shown below. Further, I am looking for a Neva Clog stapling plier, with staples, to make belt keepers. Thanks in advance; Wiz

Thank you all for your replies. I now have a new bobbin case from Bob Kovar in Toledo! It works perfectly! I also got a pound of #138 nylon thread from him at a very good price.

Howdy; I have a National brand model 306N (Made in Japan) walking foot machine used to sew vinyl and leather. It came with one M size black bobbin case. I usually pre-wind a bunch of bobbins with whatever thread I am going to use on a job and would like to obtain some extra proper bobbin cases for this machine. The bobbins are large M style (1" x 3/8"). The machine has some parts stamped Seiko and is made in Japan. It looks sort of like a Consew 206 series machine. I bought some M bobbin cases on eBay, supposedly compatible with my machine, but they had to be ground down at the upper-left opening, to allow the cases to fit into the shuttle. Also, the thread comes out of the springs in a jerky flow and causes the stitch knots to move up and down. Apparently, this machine uses a non-standard bobbin case, with a much wider opening on top. This is because the case has to clear two tiny screws on top of the shuttle assembly, about 1/4" apart. The cases I bought do not clear the left screw head and cause the case to jam, unless it's left tab is ground off at the opening on top (which I did, with limited success). I have posted a group of pictures below to show what the OEM bobbin case and the machine looks like. Hopefully, somebody here has a similar machine and/or knows where I can get the proper bobbin cases for this machine. If you have some you don't need I'll be happy to buy them from you. Thanks in advance, Wiz