Hello last resort of the free internet.
I had to sew some stoff for my basement and realized it is a real (marksmen?-)ship. It is more complicated then cutting wood for some furniture.
Anyhow, I want to enlarge my machine’s sewing step. That is, I want it to be able to sew more than five milimeters with one step. Maybe I should add a motor with more then 90 W (current Motor), but can this archived with gearing?
I do not care for sewing steps beyond <2 mm. Though my clutch allows any step-width fluidly. I am capable of deconstruct the machine and weld anything to it what is required. And make it in weight.
But my issue is figuring out what change would enlarge the step-width.
Even if your suggestion would change my settings, let me know your idea please.
Some pictures of the Internals:
(when issuing my hand down, the gearing enlarges into the direction of the arrow. But there is a ?Bobbing? on the left side. Imo this should be dependend on a rotation so I can enlarge the leverage nonetheless)
I would appreciate any tip!
I try to be in the middle of my own opinion and beeing inclusive. Sorry for stepping ppl on the toes!
Adding to try to be more helpful: post a photo of the front of the machine. Knowing what model it is can help understand what its capabilities are and what controls it has available. It sounds like you want to sew a straight stitch and you want to increase the stitch length. This should be easy to set up on a machine like the one you’ve shown, but I couldn’t tell you from the photo what the maximum stitch length you could do on it is.
The way the thing works is that the needle goes through the fabric, the bobbin mechanism interlocks a separate thread to the top one, the needle is pulled up, then the feed dogs engage the fabric to move it forward (or backwards even) for one stitch length. This dance is controlled by a careful arrangement of gears, cams and levers. You should be able to adjust it within the design parameters of the machine. To do more than that, you would redesign parts of it. Your time would certainly be better spent looking for a different model that supports your needs.
Edit: you edited before me!! But I don’t adress it yet, since you explain the context more professionally. Thank you in this regards.
The machine is more then 40 years old. I attached the photo. The right handle adjust the zick-zack-width (I had to adjust the chassis to get it zero’d) and the left handle puts the needle ‘left’/‘middle’/‘right’ in the feet.
I had to cut some chassis on the right handle to the left and adjust the internal screws so that the axle of stitch width is exactly above the front-needle of the geering. It wasn’t exact with a straight stitch prior to this.
I may add again: Me or my friends are capable of changing any axle or gearing to nm but I do not know what to request in the first hand. Engineering is very, VERY, hard… :(
I’d also add that re-engineering this is not impossible but these things are pretty much the pinnacle of engineering innovation from before the use of electronic controls. To redesign it you’ll probably end up having to relearn all of the genius that went into its design by trial and error.
My sewing expert tells me the slider on the right side the front of the machine controls the stitch length and should be all the way down to set it to maximum. The knobs on the top control zig zag and should probably be all the way left for a straight stitch. If that doesn’t get what you want this machine probably can’t do it.
As far as what it is: that’s a good mystery. It looks like one of machines to come out of the post-WWII Japanese industry. If so, getting info on it will be a challenge.
Re-engineering it sounds like a fun project but who can say how long that will take you before you’re back on your project. You could probably stitch whatever by hand in less time than it would take to disassemble that machine, fabricate a new part and reassemble it
Thank you very much. You have correctly deduced the sliders, yepp.
Re-engineering would indeed be a fun project and that’s why I was asking for advice.
Stitching by hand didn’t even cross my mind so thank you for thinking out of the box! :)