ya2daup

Ha! Sorry about that, I think you got the picture but I'm referring to the motor pulley on the patcher. I've spent some time looking it over, along with the engineering diagram I have (in German) It appears that everything on that shaft is pinned and has a sew screw so I don't see any opportunity for adjustment. I did pop the pin on the aformentioned pulley and tapped it in further which does take up the slop but without the pin that's not a long term solution. At this point I don't believe there is any solution within the machines available adjustments but the "clunking" is going to get annoying. So I think I'm going to pull off the pulley and insert a couple nylon washers. Not so much that it's tight and binding but enough so that it has minimal travel Thank you for all the pictures! It really helped identify some of that parts and what I should be considering when finishing the setup. I went ahead and ordered a servo motor and speed reducer. I'll have to make a couple custom mounts but for the most part I'm happy with the progress and plan. I looked at the plate again, it was made in '81 I'm not sure what engraving on the base you're referring to. The serial number plate on the machine says 8346/30. Now that it's sewing well and I have some more background info I went ahead and ordered a servo and a speed reducer. Other than my concern about the main shaft's horizontal movement (and the associated slop in the hand crank's spider gear) I think we're on the right track!

Thanks for the spare bobbin identification, I knew it didn't go with the machine and they're smaller than what's on my Consew. Unless anyone reading this thread want's them for cheap I'll list them on ebay. I also think the bobbin winder came from a different machine, I wouldn't think there would be much of a secondary market for that.

If you look at the second half of my video above it shows the movement I'm speaking of, but I'm happy to take another video. Oddly enough the hand wheel doesn't move, the motor pully and the whole shaft, all the way out to the sewing head, moves. I'll find something to act as a shim and see what impeding the movement does. Let me know if you would like a separate video. Much appreciated.

Success! I was able to remove the cover underneath the shuttle assembly (not sure if that's the correct terminology) and move it around until it started picking up the bobbin thread. I did some test sewing and it appears to be working well! Any thoughts on the horizontal play in the main shaft that is connected to the motor pulley? At the top of the cycle it moves about 1/4 inch and then "clunks" back into place as it continues the cycle. I can't think of any reason why it would do this and want to make sure using it like this isn't going to cause undue wear. Once I'm confident that it's operating correctly I can start work on the motor, trundle and speed reducer. I do believe you're correct on the age. The serial number ends in 86, which I believe is the manufacturing year. I did see that old post about you having an english translation for the mechanics manual. I didn't realize you did the translation yourself. I'm sure they were very appreciative! If you can locate it I would be very grateful if you would send me a copy. The old owner removed the motor and trundle connections so any pictures of that setup would also be greatly appreciated.

My Consew's servo has a min of 400 rpm and I have the smaller pulley installed. If anything a needle positioner would be nice on this machine. As for the Claes I think I'll get a speed reducer to really slow it down. Yup, thanks for the correction on model number. For some reason I've been transposing the 3 and the 4 ever since I first read about this model. I can't find a way to change the title or I would... I'm sure you're right about boot soles. I don't really have any goals with the machine other than to be able to get into tight places for boot and backpack repairs. If it did soles that would be a bonus but not a deal breaker. Thanks for the link, that manual seems to be posted on a few websites. I also have a document with drawings of individual components but that one is in German. I've seen posts regarding a mechanics manual but I can't seem to find one posted online. Hopefully you're right on the adjustment. We'll see what everyone thinks after looking at the video. No worries on the sole work, just brainstorming what things I may attempt to repair. Yup, I think slowing the machine down to a crawl would beneficial than a positioner. It came with a couple dozen 88 needles, I didn't see any 81s in the batch. Here's the uploaded video. Along with the needle timing I'm also concerned about the horizontal play in the main shaft. You can hear it "clunk" into place every rotation. Here's the Youtube link, hopefully it's good enough:

Thankfully I haven't had to adjust the Consew, it runs like a dream. The pickup timing on the Claes appears to be way off and there's also some odd play in the main shaft running from the pully over to the head. I'll post a couple videos tomorrow. Thanks again.

Well it appears that I have bigger issues. I got it threaded up and the top thread doesn't want to pickup the bobbin thread. I put in an empty shuttle and cycled it with the bobbin holder door open and it appears that the machine is WAY out of time. The fact that the back cover was off when I purchased it seems a bit dubious. I'm mechanically inclined but with such little information available about these machines I'm not sure where to start. I can post videos if anyone is willing to help troubleshoot. I'd happily pay for some online tutelage.

Thank you for your reply. Materials/intended use: I'm using it for general repairs and small batch fabrication. Anything from lighter weight materials up to max thickness leather and boot soles. So I would prioritize control and accuracy over speed. I also have a Consew 206RB-5, I swapped out the clutch motor for a servo with the smaller pulley last fall (I did not get a needle positioning sensor). I went back and looked at the product listing and it doesn't mention whether or not it's digital or analog, only that it's a 750W Brushless Servo Motor. It does seem a bit jerky at startup and even on the lowest setting there are times I wished it moved a bit slower. *EDIT* On second thought, is analog vs digital as simple as a dial controller vs a digital display? If so, the one I have is digital.

Good afternoon all, First off, thank you all for the years of information on this site. I recently created a login and this is my first post but I've been quietly soaking up the wealth of advice for over a year. I just picked up a Claes 8436-30 for a great price and would appreciate some help getting it tuned up and ready to go. Everything seems to rotate smoothly and corrosion is at a minimum. I haven't tried sewing with it yet but am hopeful that it'll take off without much effort. I found a couple other posts about these machines and found them helpful, but would appreciate a bit more info. Also, my documentation is in German and would appreciate it if anyone could help me track down the user and maintenance manuals. It looks like it was either set up with a motor at one time or darn close to it. Can anyone recommend what size servo motor I should put on it. And how imortant is a speed reducer and needle positioning sensor? @shoepatcher, @Constabulary. Sorry for the tag but you two seemed to have a lot of great input on the other posts I saw. I'm attaching photos of the machine and the hardware it came with. Thanks in advance for your help