northliftbelts

I did adjust the feed cam I believe, I'll check your process to see if it bounces at 0 stitches. The whole machine now sounds like it is just working really hard. i can't get a nice slow speed on it, even with my servo. Takes a lot of power to overcome this feeling of tension in the machine, and by the time it does, its stitch speed is quite fast and pulls my work out of my fingers. Strange! THank you for your thoughts.

Quade, I have went through the entire service manual, done every step in that book - the feed dogs are lying perfectly in the feed plate. Im glad you figure it out though! It did get me thinking, maybe theres some spacing issue between the needle and presser feet.

Uwe, Thank you so much for the reply. I found the culprit for the feed dog play - it was a new bolt that came with a binding attachment system. It was not large enough to fit into the hole that moves the feed dogs (See pic). I swapped it for the old screw and the longitudinal feed dog play has reduced from 0.5mm to around 0.1 or 0.2, barely noticeable and a huge improvement. Regarding the lever bouncing - I'm still at a loss. Your thoughts make a lot of sense - something is rubbing up on something else and the lever's play is the weakest link that allows for a mechanical compensation. The machine stitches very well now, and the bouncing happens the most at the longest stitch lengths. There is an audible click coming from the rear right of the machine on every stitch however, and it coincides with a little jump of the lever. It seems to happen near the middle-end of each stroke cycle, before the needle leaves the material. Do you have a technical manual for this thing? The service manual just doesn't go into this at all, but I have found some older, far more technical manuals for this machine, they are just hiding behind paywalls to shady websites it seems.

Hello Wiz, It does have a spring but seems like it has a good amount of tension on it. I remember I had a similar issue on my 441 clone, which just required me to tighten a screw inside the lever chamber. I cannot find a corresponding screw in the 69. There is also some forward/backward play in the feed dog, which at times results in my needle missing the needle hole anteriorly, and breaking/bending. The manual goes over that positioning, but nothing specifically about this play, which to me seems excessive. Thanks for the response!

Hello! I've been scouring the google, this forum, everywhere, to try to solve my issue of a bouncing stitch length lever on my adler 69 and pfaff 93. As the feet pull the material, my stitch length lever bounces upwards and shortens the stitch. I've been through the entire adler 69 service manual, and for the life of me cannot find a resolution. Would love some help! Thanks so much in advance.