sorefingers76

The sensor is mounted on the hand wheel. So as long as it stays tight and the machine keeps its time. It should work flawless. Because the sensor Is reading the position on the main shaft in the machine. And tells the controller that position so when you back press the pedal the controller knows where you told it was up. When you set it up and if it stays in time and the sensor dose not come lose it should run the motor enough to put it to top position. If the sensor was installed on the motor which is incorrect a speed reducer pully system or a belt slip would be a nightmare. That's why they go on the hand wheel so they keep time with the machine. Belts slip as we all know.

Most 335 machines have around 15 mm of foot lift. And can sew 6mm thick any thicker and they don't feed due to the walking feet only raise so far while lowered in to sewing position or that's what the spec. On the Yamata fy335a that's what I have I got mine for lighter weight leather . Like wallets and hand bags. I use a Tipman boss for holsters it will sew 3/4 inch thick leather but it's manual not powered by electric. There are machines that will sew heavy-duty items but they are pricey. Cobra makes a nice machine for holsters that's electric. I'm new to the 335 myself but have done leather work for 30 years.

Having a issue with a 335 yanimita I know that's not the correct spelling but any way I'm getting bunching skip stitches and thread breakage. But just on back sticking. Sews heat with number 69 thread I believe I'm using 135 thread and number 20 needles. For the larger thread. It'd like when I back stitch through the previous stich it affects the tension of the top thread like resistance wise. I make a bunch of leather bags and hats . But primarily leather and I have a tipman boss and I know sewing tooling leather and dryer leathers are way different than sewing chrome tan oily leathers. With a machine. I had a old Adler shoe patcher and it didn't bunch on a back stitch. If it bunched it done it all the time same as the boss. This is a new one for me any suggestions . Thanks