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I am replacing the cam gear on a bernina 730 record sewing machine but I need to know how to set the cam gear so that its timed properly..otherwise..I think the needle will move while its in the material...I have already removed the cam gear..(should have marked it)...and got a new one..any help would be greatly appreciated

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Should not make any difference, put the camstack in, there should not be any timing marks and it should not affect the machine

Posted on Jan 31, 2010

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Bernina 730 how do I change feed dog pressure it is way to high not touching fabric when down??? Help please


There are actually two Bernina 730 machines (confusing, huh?). One is the 730 Record from around 1960. The other is the more modern 730 computerized model made in the 21st century.

The 730 Record has a hidden pressure adjustment. Lift the top cover and locate the screwhead on the very left side (left of the takeup lever knuckles). This screw loosens or tightens the spring that applies pressure on the presser foot.
The manual can be downloaded here, although it does not show the pressure adjustment:
BERNINA Sewing Systems

On the computerized 730, the pressure adjustment is on the screen (pg 37 of the manual):

BERNINA Sewing Systems

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Jun 25, 2016 | Bernina Sewing Machines

1 Answer

Bernina 730 Record Service manual


Service manuals are difficult to find for most sewing machines, which Bernina is not an exception. However, there is a Yahoo Group called "BerninaThirtySomethings" that has conversations, documents, photos, etc. for the vintage Berninas including the 730 Record. You can join the group (must have a Yahoo email account) and download a variety of documents including a "Setting Manual" for the 730.

Yahoo Groups

http://www.thesewingforum.co.uk/showthread.php?t=28999

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Apr 15, 2016 | Bernina Sewing Machines

1 Answer

Hello i'm french and my english is very bad sorry... how to change cam gear in bernina 730 please. Rick says he knows that . have a good day jp


This series are prone to cracking the cam gear. Search Bernina cam gear at www.ashleyandthenoisemakers.com and there is a full example with pictures on how to do it. Try ebay for the gear. Check prices.

Nov 06, 2015 | Bernina Sewing Machines

1 Answer

Supply of new stitch cog for Bernina 830 Record


I don't know what a stitch cog is by your definition but I suspect that you may be referring to the cam stack worm gear, part # 310 007 03. These gears are available, however those produced and sold as after market parts online have ranged from bad to very bad. I would suggest that you find an OEM part (not a reproduction) that are still available from time to time on EBAY etc.
Changing the gear is not as straight forward as it may look. The proper replacement requires: 1. removal of the cam stack without damaging the machine parts, 2. removal and installation of the new gear with the correct alignment of the individual cams, 3. installation of the cam stack and pattern indicator without axial play, 4. correct parabola timing of the main-shaft worm wheel and cam stack gear, 5. synchronization of the zigzag and automatic cam parabolas, 6. pattern indicator timing, 7. checking and adjusting the automatic needle position. SewTechnical Home

Jun 14, 2014 | Bernina Sewing Machines

2 Answers

Bernina 730


try changing the needle--one for the fabric being sewed
also the zig zag could have a worn or damaged gear or cam
or there could be a timing problem.

Apr 11, 2014 | Sewing Machines

1 Answer

I need to purchase a replacement gear for a Bernina Record 730. Can you direct me to a source?


I'm not sure that the gears for that machine are still available... If they are, any bernina dealer should be able to order one for you or may have a parts machine you could take one from.

Feb 22, 2010 | Sewing Machines

2 Answers

Bernina 730 cam gear replacement and alignment


It does not matter where the position of the camstack is when you put it in, it should not affect any other part of the machine.

Jan 30, 2010 | Bernina Bernette 75

2 Answers

Replace Gear Stack Cam on Bernina 730


This is a very common problem with these machines. First of all you have to have a new camstack gear. Then you may need a tech to do it. The gears can be found for purchase on the internet with a search. If you feel you want to do it yourself contact me and I'll tell you how but its very involved and many things have to be done just right for it to work.
Rick

Apr 11, 2009 | Bernina Bernette 75

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