laether

Its Pfaff 145-1B H2L...so am I good to go with 140? (120 fits okay).

okay thank you! Maybe I go with 140 size needles first!

hi folks... Strangest thing, but I bought some Schmetz 160 LR needles to sew some very thick leather on my Pfaff 145 but I just noticed that the needle wont go through the walking foot's hole....I really do wonder what's up with that (manual lists this needle size)? This is the only foot I have currently for this machine...Thanks in advance!

thanks! will check these. one more question: how does one adjust the belt tightness on "Jack Jk-561A-1 Servo Motor"? there must be a general way how its done with servo motors?

thanks, already found them...and yes, a bit over my budget...

Thanks! Just what I thought! Found this UK seller: https://www.college-sewing.co.uk/store/JK-561A-220V-750W%3d1HP-SERVO-MOTOR Any other suggestions on where to buy (cheapest)?

yes, thanks!

hey @Constabulary found this useful thread while searching info on servo motors! Noticed this being almost four years since you first posted, so I was wondering what's your opinion now on the "Jack Jk-561A-1 Servo Motor"? You see after my research-work on the subject I'm seriously considering of buying one. Thanks!

Thank you @Uwe again! This is just the kinda physics I was thinking is involved here, well put! =) Thanks to others aswell. I'm going to invest on new servo motor. Is there a thread about servos? I found this, but its quite short: http://leatherworker.net/forum/topic/80458-servo-motor/ I would appreciate if you could advise me a bit on them? What kind of servo do I need? Here's the specs: -I'm in EU -do not want cheapest chinese one, would prefer buying from Germany etc. -but also wouldnt need the most expensive either...I guess something in the middle... -will take the motor & my machine to a maintenance shop, just would prefer buying the motor myself, to save some €s

Thank you @Constabulary and @brmax! I try to explain what I meant: It feels I have to hit/push the pedal quite hard to get the machine going, but after that I can loose my foot so it goes slower and is almost manageable. And at this slower speed I'm pretty certain I push the pedal less than I did when trying to get the machine going. But one very important thing I just noticed: At the back of the machine, there's this "wing nut" which is for adjusting the foot height. When its like in the picture (lowest) the machine starts easier, meaning I push the pedal carefully and it starts sewing quite nicely. This is how it was when I bought the machine. Now yesterday I began learning the machine by adjusting certain things (foot height & pressure) and when I adjusted the wing nut so that the foot is "highest" the trouble started. Trouble being the exact thing: I have to push the pedal quite hard to get the machine going and if I don't immediately loose my foot, it goes way way too fast.

found this thread. Bought old Pfaff 145 with this motor. I have a bit of a problem with speed. It needs quite a push and then runs way too fast if I dont immediately loose my foot. After that I can sew quite slowly but starting is the problem. Wonder if I can do anything about it? Heres few pics, please advice me: what motor I have and what's that grey tube for? THANKS!!

Actually knurled nut has two "wheels" you can adjust: wonder what's with that? And still my previous question: tried top-stitching, had two pieces of leather and first did regular seam, right sides facing. Then folded the seam allowances underneath the other side and started top-stitching. First everything was fine, but when my Pfaff145 reached the folded part with three layers it got stuck and wouldnt go further. This must be something to do with the walking foot? Needs adjustment? I guess with this machine, going from one layer to three should not be a problem at all? And same thing if I adjust and start from the top of the folded seam: machine cant feed the fabric and gets stuck.

Manual says: "12. Regulating the Pressure on the Material: The amount of pressure to be exerted by the presser foot must be adapted to the material to be sewn. The pressure is set correctly if the material is advanced through the machine evenly without being injured by the teeth of the feed dog. The pressure on the material is regulated by turning knurled nut V (Fig. 1). Turn this screw in for less pressure, or out for more pressure. On Model H machines the pressure is regulated by turning the knurled screw in the upper guide bushing of the presser bar. Turn this screw in for more pressure or out for less pressure. http://leatherworker.net/forum/topic/77444-pfaff-145-h4-and-new-tech-servo-motor/ There are two variants of this machine as explained by @Uweon the thread above: @Uwe: The bar across the top is a spring blade that provides pressure for the presser foot on certain Pfaff 145 subclasses. (see the picture below, my machine that is). Other subclasses have a vertical spiral compression spring that wraps around the presser bar. And on this thread you can see the other variant: http://leatherworker.net/forum/topic/63483-pfaff-145-presser-foot-pressure/ But unlike the manual information I guess I have model H AND knurled nut....

Yup! Imago-wise excellent. music-wise mediocre! My idea is to go through the links you also provided and add most important information here on this thread! Also thanks @Uwe for the youtube-links (you might wanna check my question below)! Now my question is: I tried top-stitching, had two pieces of leather and first did regular seam, right sides facing. Then folded the seam allowances underneath the other side and started top-stitching. First everything was fine, but when my Pfaff145 reached the folded part with three layers it got stuck and wouldnt go further. This must be something to do with the walking foot? Needs adjustment? I guess with this machine, going from one layer to three should not be a problem at all?

hi folks! First time posting here, hopefully I'm not stepping on anyone's toes...Last weekend I brought home "Pfaff 145-1B H2L" leather sewing material and been googling info on it. Found this forum and theres PRICELESS information here. However I learnt its basically spread on different messages / threads so I started this "All things Pfaff 145" thread to collect everything I've found on one place. To help newbies like myself and also collect all the important data on one place. Pfaff 145 Manual in english: http://www.pfaff.com/SiteMedia/PFAFF/Products/Machines/Support-manuals/pfaff_145-manual-EN.PDF Pfaff 145 & 545 Parts book http://www.industrialsewingmachineparts.co.uk/pfaff_145_545_partslist.pdf Here's what I've learnt from classification so far: H1 & H2 7mm under foot H3 11mm under foot H4 14mm under foot Needles: 134 (H1&H2), 134-35 (H3) and 190 (H4) A: light materials, B: medium, C: medium heavy D: heavy L: leather N: 6 mm stitch length