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About Kohlrausch

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  • Gender
  • Location
    Berlin, Germany
  • Interests
    kayaking, photography, old technology

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  • Leatherwork Specialty
    breaking needles ;-)
  • Interested in learning about
    sewing machines
  • How did you find leatherworker.net?
    googling sewing machines ;-)

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  1. Ho Hsing G60 servo or what?

    I don't remember the exact values, but in older user manuals I have seen values like 600 spm for backtacking, 300 for needle up/down and 150 for thread cutting. So trying to do that at full speed may be a bit adventurous. Greets Ralf C.
  2. Ho Hsing G60 servo or what?

    How bout this? https://www.kornetshop.com/deutsch/elektromotoren/servo-motor-jm822-650w/#cc-m-product-7750616786
  3. Pfaff 335: Advice Appreciated

    That's old casting vs. new casting. Greets Ralf C.
  4. If you don't need the zigzag a Singer 31 will give you the same sewing capacity and may be easier to find.
  5. Maybe I have overlooked it, but upstate where? Could help to recommend local brands. A (used) Pfaff 138 B with standard-, teflon- and roller presser foot and a (new) slow running servomotor with 40 mm pulley might be a good start. Total cost would be about 220 Euros over here. Pfaff 335-clones (made by Shanggong) with stand and slow running servo motor can be had for 880 Euros in Germany plus 70 Euros shipping (incl. sales tax). Greets Ralf C.
  6. Hi, that's a highspeed garment sewing machine designed to do 4500 stitches/minute. The "A" in Pfaff-designations refers to light capacity, lightweight materials, the "S" refers to Stoff, german for fabric. Think of curtains, shirts, bedsheets. I assume, posterity will be able to find out, because, as you write, they do show up in searches. Cost varies, 138s go for 40 to 70 Euros in Germany. They can handle shoe uppers as in ladies' boots, not workboots or walking boots. Much of the practical usability will depend on the motor and the presser feet. Greets Ralf C.
  7. PFAFF 30

    Hi, first of all I would advise against buying from Yaya-online. They also list anal- and penis plugs, mouth gags, vagina speculas, surgical instruments, diet food which in my opinion does not exactly make them sewing machine specialists. 2: The motor you have found is also offered for the Pfaff 130, but the mounting bracket is too short for the 130 and it is also offered for the Pfaff 260, which does not even have the necessary motor mounting block. 3: The motor is advertised as CE conforming, but does not seem to have any sticker or other sign of CE, which in my opinion would make it illegal to sell in the EU. All goods sold in the EU must conform with EU regulations, which is declared by the manufacturer (and checked by nobody) in a declaration of conformity and the specific CE sticker or mould. 4: Yaya's return policy only allows you to return the motor if it has not been installed and tested. So if you don't like the black, you can return it. If you find it too week or too fast, it will be your problem. 5: Yaya does not care for technical data. They will pass on whatever the mfgr printed on whatever, and if that doesn't make any sense or is physically impossible they neither check nor care nor correct mistakes. 6: The motor is quoted to do 8000 rpm with a 15mm pulley which would bring the Pfaff 30 to 2000 stitches per minute which is too fast for the oscillating hook machine. You want to stay at or below 1500 spm. 7: They don't say how many steps there are in the footpedal. The worst I have seen was three steps (off, minimum, full throttle). 8: They don't give the minimum working speed of the motor. 9: Doesn't matter, the motor is sold out anyway. Yaya is notorius for advertising goods they don't have. The amperage is the fuse rating of the motor and usually has a small safetymargin, so the given amps will be higher than the actual power consumption. 240 Volts and 0,38 amps would be 91,4 Watt power consumption, take off the safety margin and we are looking at an 80 Watts motor. This kind of motor has power factors between 0,35 and 0,55, with the 0,35 motor being a single outlier. The typical range is 0,45 to 0,55. The average, when I compared motor data that I have found on photos and spec sheets was exactly 0.5. Really, that Wernard motor is as good as it gets, you will not gain any usability by buying another little piggipack motor. The Pfaff 30 is very similar to the Singer 15. You can read everything Wizcrafts has written about the Singer 15 in this forum and directly apply it to your machine. HTH Greets Ralf C.
  8. Pfaff 335 Stitch Length Question

    Hi, Eddy occasionally reorganizes his homepage. Der Nähmaschinenfachmann now can be found at https://www.occaphot-ch.com/bernina-original-service-manuals/ Greets Ralf C.
  9. Zig-zag machinez

    Hi, the Pfaff 130 was designed as a commercial machine alright, but for womens' tailoring and linnen stitching. Think silk blouses and bedsheets. The 138 has been designed for mens' tailoring and industrial garment production. The 138 has am much stronger presser-foot spring. Weak spot in the 130 is the needle bar clamp which lacks clamping power if the 130 is used for heavy work. There have been several variants of the 138. I recommend the old black ones with needle system 134. There have also been some with more exotic needle systems and household needles. The 138 works well with a roller foot. The Pfaff 34, 38, 134, 138, 238 etc. use a Pfaff-specific high shank foot. There will be few aftermarked feet. Pfaff also made an adapter, part number 6603 which converts the high shank machines to standard low shank. If you want to go really exotic you can look for a Pfaff 38 C/D with 6 mm zigzag and double roller foot.Never seen one even on the internet, but I have the manual ;-) Greets Ralf C.
  10. Timing a zig zag machine

    Hi, lateral shuttle movement would do the trick. Mitgehender Greifer in Krautspeak. The Solent Ocean XL sailmaking machine would be an example of the technology. Greets Ralf C.
  11. Aerostar Servo Motors

    Hi, this appears to be the motor Sailrite is demonstrating here against their MC-SCR-system. They stopped the sewpro - set to slow sewing - with one finger. Greets Ralf C.
  12. Aerostar Servo Motors

    Hi Alex, talk to Frank Brunnet. http://www.frank-brunnet.com/ He is the Cowboy Bob of our side of the pond. I will probably get one of those http://www.ebay.de/itm/leiser-230-V-Motor-800-W-passend-für-Industrienähmaschine/322847634323?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2055119.m1438.l2649 in the next couple of days. Greets Ralf C.
  13. Way cool. And you truely are lucky with the Pfennig. I only found 50 nails when I cleaned a Singer 7. Greets Ralf C.
  14. Aerostar Servo Motors

    Hi. Mfgr claims a torque of 4 Nm out of 500 Watt at 4500 rpm. If I do the math this gets me 1 Nm. Greets Ralf C.
  15. Aerostar Servo Motors

    Hi. In the description it says 750 Watt. On the picture it says 550 Watt. Better check before you buy. Greets Ralf C.