Members alpinelite Posted May 7 Members Report Posted May 7 Hi, I recently picked up barely used Juki LZ 2286 for 100EUR. Its a tri step zigzag machine I would use for bag making purpose. Anyway it came with EFKA Vario DC Motor that is faulty. Something to do with needle positioner or electronics so I was quoted 300EUR for repair. So I wonder if ditching EFKA and going with 750W servo motor with no fancy electronics is the way? What do I loose? I mean I can probably set up a knee lift and can cut the thread with snips etc. Thanks for your insights! Quote
Members Tigweldor Posted May 7 Members Report Posted May 7 (edited) Efka motors are 3-phase industrial AC (clutch) motors. It will not be the motor that is at fault - it will be the electronics that "steer" it. Usually, the needle positioning unit is at fault or just simply not set up proper. If I can give you some advice - check the needle positioner unit at the back of the hand wheel. If you give me the data on the unit - I can look into sending you correct set up procedure. No use wasting hard earned cash if the remedy is just re-setting things, which costs no coin at all. And yes - advice is free - I will not charge you 300 Euros to solve your problem - as most shops will want to do. Actually, if you unplug the positioner leads at the control unit - the sewing machine/motor should perform decent again - the thread cutter may not work as originally intended, though. That naturally all depends upon the control unit - in my eyes all stuff that may be necessary in industrial application - no "home sewer" or small shop really needs a thread cut of device. Greetings Hans Edited May 7 by Tigweldor Quote
Members alpinelite Posted May 8 Author Members Report Posted May 8 Hello Hans THANK you for willing to help. Do you have email I can reach you directly to help solve the control unit issue. I can send you some pictures. Best regards Quote
Members alpinelite Posted May 8 Author Members Report Posted May 8 7 hours ago, Tigweldor said: Efka motors are 3-phase industrial AC (clutch) motors. It will not be the motor that is at fault - it will be the electronics that "steer" it. Usually, the needle positioning unit is at fault or just simply not set up proper. If I can give you some advice - check the needle positioner unit at the back of the hand wheel. If you give me the data on the unit - I can look into sending you correct set up procedure. No use wasting hard earned cash if the remedy is just re-setting things, which costs no coin at all. And yes - advice is free - I will not charge you 300 Euros to solve your problem - as most shops will want to do. Actually, if you unplug the positioner leads at the control unit - the sewing machine/motor should perform decent again - the thread cutter may not work as originally intended, though. That naturally all depends upon the control unit - in my eyes all stuff that may be necessary in industrial application - no "home sewer" or small shop really needs a thread cut of device. Greetings Hans Quote
Members Tigweldor Posted May 8 Members Report Posted May 8 (edited) Seems that you do have an EFKA DC motor. https://www.efka.net/fileadmin/downloads/DC-Antriebe-Drives/AB62AV/EN_BA_AB62AV_3_3__220995.pdf Take your time and read/study thoroughly - might take a few hours. Edited May 8 by Tigweldor Quote
Members alpinelite Posted May 8 Author Members Report Posted May 8 1 hour ago, Tigweldor said: Seems that you do have an EFKA DC motor. https://www.efka.net/fileadmin/downloads/DC-Antriebe-Drives/AB62AV/EN_BA_AB62AV_3_3__220995.pdf Take your time and read/study thoroughly - might take a few hours. Yes I have read that manual and according to the signaling error I have an issue with position transmiter. I have reached EFKA service company to confirm and they quoted the above repair. Do you think position transmiter needs readjusting? If I unplug it from the control box machine will not work. Best regards, Quote
Members Tigweldor Posted May 8 Members Report Posted May 8 (edited) Yes - definitely check the settings and adjust if needed. How to do it right is explained step by step in the manual. What model of positioner do you have mounted onto the drive shaft - I still have a couple kicking around in my spare parts box. These needle positioners are the "weak spot" on the whole system - there are 2 spinning discs on the inside that can move out of sync. Edited May 8 by Tigweldor Quote
Members alpinelite Posted May 9 Author Members Report Posted May 9 17 hours ago, Tigweldor said: Yes - definitely check the settings and adjust if needed. How to do it right is explained step by step in the manual. What model of positioner do you have mounted onto the drive shaft - I still have a couple kicking around in my spare parts box. These needle positioners are the "weak spot" on the whole system - there are 2 spinning discs on the inside that can move out of sync. Hello, I have tried: Unpluged needle positioner and motor stopped and started signaling error. Unpluged needle positioner before starting machine and it started signaling when I started machine.. If I turn machine off and start it again I am able to do 3 or 4 stitches before it stops ans starts signaling. Needle positioner is EFKA but I was unable to read what type/model as I didnt have my reading glasses with me The plug looks like the one I have attached. You are menitoning 2 spinning discs...I reckon I need to remove the positioner cover and do what? This is my first time dealing with positioner. If I can fix this it would be awesome as I got intimidated with the service costs they have quoted. Thanks Quote
Members Tigweldor Posted May 9 Members Report Posted May 9 Yes - read manual page 16 For the position transmitter I need the actual serial numbers - even with my reading glasses on I can not read the little lable. Type = P5-2 or P52 ?? - they have different types. Have to get more intricate info from EFKA - can not do that without complete specs or else I will make myself look silly. I have set up procedure for the old P5 units - but it is in German and very short - I know that they have more detailed info. I would seriously advise you to get help from a friend who is an electronic technician - this is all not stuff for Joe Hobbyist whose main job is a logger (not that I am knocking loggers, used to be a tree topper and a shake block cutter myself when I was young) - but you have to eliminate all potential probs step by step. Greetings Hans Quote
Members alpinelite Posted Monday at 05:05 AM Author Members Report Posted Monday at 05:05 AM Hans, thanks. I have managed to check for position transmiter and its: EFKA P5-2 repl. P4-2 Q55 1436 CE Quote
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