Vintage, but computerized Pfaff 6270 question
 

I hope this is the correct spot for this question. I recently got a Pfaff 6270 on Craigslist. It was sewing perfectly until yesterday, when it would only do a straight stitch forward, ( It have many stitches, practical and decorative.) We had an unusually hot and humid day here, 93deg. and I was away for hours and my house was HOT when I got home. Can this cause a machine to malfunction? This morning it worked just fine. I know that a computer can freeze up when it is very hot....can a sewing machine? I was shocked when I tried it this AM....but I wonder if it will happen again.

I don't think it's related, but when i got the machine a few days ago, from the husband of the owner, now deceased, it sewed OK but the presser foot was slow to go down. I assumed it was sticky with too much oil, so I left the light on for hours at a time, and it did loosen up when it's warm, slightly slow when it's cold. Can leaving the light on so much cause this type of problem? Ideas????

Does it have a battery somewhere?

Or the mother board might be going.

Or it might be sticky from lack of oil.

No, no battery.

My first thought was that the board had gone, but when it started working perfectly again this morning, I changed that idea. I would like to know if the boards work on and off when they are going, or just go all of a sudden.

I put Triflow on a Q-tip and rubbed it on the presser foot bar and the needle bar, so those parts have been oiled. I think I will take it in for a service, because it seems a bit noisy even though it sews well. I'll have my repair person check the board/s.

QUOTE=bearisgray;7312491]Does it have a battery somewhere?

Or the mother board might be going.

Or it might be sticky from lack of oil.[/QUOTE]

I don't know what is wrong with the computer. They do not get sticky from lack of oil they get rusty. The sticky is from dried oil. If it were oiled the sticky might loosen up a little. Some oil works faster to dissolve than others. Heat will help loosen up the old dried oil but it may re-sticky when it cools off. If someone used an oil like 3 in 1 oil it may be hard to get unsticky. I would use some tri-flo on every moving part. Turn the hand wheel and look to see what moves then give it a little drop of oil. You don't need to baptize it.

I have a Pfaff 7550 that started to have "that presser foot going down very slowly" problem. I did some research and found that the spring in the column that works that presser foot gizmo had become less springy (pardon all the technical jargon). Eventually I couldn't even get the presser foot to stay pressed down on the fabric/feed dogs in order to sew. Took it apart partially but realized that yea, it is computerized and I didn't want to ruin the machine because I got it for a fantastic price and more importantly, I love it! So off to the dealer to get it replaced. Runs like a top now. Oh I hope that machine cannot read because as soon as I say something like that, you know what will happen.

I do have a battery in my machine but I think it is only to keep stitches that I have saved in the memory but I might be wrong on that. I too would think that if the mother board is toast, it would not work at all. Hope you can figure out what the problem is. Probably taking it to the repair guy is a good idea. Might need a good healthy cleaning and tweaking to get it up too its highest potential

Note do not use heat near plastic or computers. MY BAD.

On every metal to metal moving part. Even tri-flo is dead dinosaurs and not great for some plastic and nylon parts and if that machine is like my 6122, it's got more white stuff in it than you'd think.

This sounds like a mechanical problem - not a computer problem and is likely - as Miriam says - a problem of old dried gummy oil.

I too hope for your sake that the motherboard isn't having any issues. I would take it in for a check up and cleaning.