Machine Stitching Accurate Curves

[friquant]

How to develop the skills to accurately match curves? (You know, like a motorcyclist on a mountain highway)

Attached is an image of my practice session. A paperboard box with a smooth curve drawn on it with ink, then my "follow the blue line" exercise with the triple-feed upholstery machine.

While I ENJOY keeping the motor spinning the entire time, and taking the curves at slow, continuous speed, when practicing this way I notice that any time the outer toe is touching down, the paperboard tends to pivot about the rear (heel) part of the outer toe. Since the heel of the outer toe is NOT concentric with the needle, this leads to a couple of side effects.

Side Effect A: Any rotation of the paperboard while the outer toe is down  not only changes the direction of motion, it also moves the current position  to one side or the other.

Side Effect B: Any rotation of the paperboard while the outer toe is down increases the stitch length because in addition to the forward motion of the feed, it now has the additional lateral motion from my rotation pivoting pivots around the heel of the outer toe.

[kgg]

2 hours ago, friquant said:

How to develop the skills to accurately match curves?

Maybe adding a speed reducer would help????

kgg

[Scoutmom103]

Depending on how thick the leather (i.e. material) is, you might need an industrial chain stitch embroidery machine that uses a single needle and thread.    Meistergram Embroidery Machine, Singer 114E103 .     Check out Youtube     "Chain Stitch Embroidery" 

 

 

ChainStitchEmbroidery - YouTube