Question about Sewing Machines
Nylon cam gear on Bernina 830 (old 830 not new) is cracked from center to circumference. machine seizes once per revolution of this gear until manually crank through the rough spot, then runs until rotates enough and seizes again. How do i replace the gear and how do i ensure i have the correct part? Also, while i'm "in there," should i replace anything else? i'm willing to invest in the machine, say new belts, replace any known problem parts, etc.
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Posted on Jan 02, 2017
Hi Rose Mary,
I'm assuming you are talking about the original Bernina 830 (their newest machine is also an 830!)
If you've not had your machine professionally serviced in awhile, it could be as simple as a good, thorough cleaning and adjusting. Your machine should be professionally serviced about every 1-2 years....not a bargain service that blows out the dust and puts oil on the hook, but a service that checks all the gears for wear, adjustments, hook timing, feed timing, grease for the gears (if required), removes lint build-up deep in the machine - very thorough.
There are various gears in the 830 that control these functions. It sounds as if one of the gears may be either broken or jammed. Unfortunately, unless you are trained in machine repair, this isn't something you should attempt. When gears are replaced or adjusted, generally the timing of the machine must be reset as well.
We would recommend that you take your Bernina to your nearest authorized Bernina dealer (they'll be trained on your specific machine and have easy access to any parts that may be needed).
If you do not know a dealer in your area, you can search on the Bernina website.
The original Bernina 830 was one of the greatest models Bernina has made and is well worth putting the money into keeping it running. Great machine!
Hope this helps narrow down what may be happening.
Kim & Linnette
Posted on Nov 29, 2008
there is a board inside the foot pedal that goes out sometimes you can check this by flipping the foot pedal upside down and at the top right there is a small hole where you can adjust the speed with a flat head screwdriver but be gentle it breaks easy, if its out you can take it to a bernina dealer and they might have a reapired one or they can send yours off for repair since that part is repair only
Posted on Jun 26, 2009
Sounds like you need to adjust the tension. Probably a good idea to oil this older machine before you adjust. Also look for and clean out any lint or debris in bobbin case and around foot area.
Posted on Aug 29, 2009
The clamping yokes for Bernina sewing tables for models 830 and earlier models were hand fitted parts. Welding this may change the geometry so that the table may not fit at all. Additionally the material is diecast AL, not cast iron, and may or may not accept TIG welding applications.
Posted on Sep 06, 2009
SOURCE: Bernina 707 Cam removal
take off the black metal bit that is above the pattern cam (4 screws). beneath you see 2 small screws, inside the metal frame, on each side of pattern cam. Take them out. Spin the pattern cam until you see one screw in the cam itself. Take that out too. Now you can push the splint out which holds the cam.
Posted on Sep 08, 2009
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