Eccentric adjustment

[Dave56]

Has anyone made any adjustments to the eccentric or connectors on the Hegner M22

[Rolf]

I assume you are talking about changing the stroke length. Looking at the manual it says you can shorten it for cutting thin wood and or metal. I have never known anyone that did that. We have several Hegner owners in our club. I am not one of them.

[garryatpa]

As Rolf has said changing the stroke length is recommended for sawing thin material. When new, the saw is set to the longer stroke length. There are two positions on the centre of the flywheel ; the longer normal stroke is in the location farthest from the center. I have had a Hegner 22 since 1993 and never really found a need to change the stroke length. Are you looking at changing the stroke length in order to saw something specific? Or having a problem with your saw? If I am sawing thin material, example 1/32 baltic birch for bookmarks, I stack saw up to 10 or 12 layers making it thicker and easier to saw.




When my saw was about 10 years old the plastic link broke and the bearing enclosed at the one end came out. While waiting for the replacement bearing to come I glued the old one together with epoxy and was able to use it for a week or so until I got the new one. I still have the old one in case I need it.




If you are having problems with your saw - different noise or vibration - listen to your saw and it will tell you that something is not right. It may take a bit of digging to find the problem but check your saw starting with the most obvious and work your way through. There are not many things that can cause problems on the Hegner. Here a few items to check. The link from the lower arm to the flywheel - check for cracks or bearing problems; the bolts and washers holding the link need to be tight but only tight enough to remove any vibration, too tight is not good. The washers need to be installed in the proper order and sequence. I had a vibration I could not find the cause of. I thought I had checked everything and talked to the people at Advance Machinery. After some discussion we decided it must be in the link and I replaced it. Much to my surprise it cured the problem even though it looked good.

Other things to check are loose bolts that need to be snugged up, bushings in the arms that may need oil (these should be oiled every 10 hrs of operation and I have never replaced bushings ); sometimes the tension rod works loose very slowly and needs a 1/4 turn or so; the pin holding the quick release works loose and starts to move so needs to be put back in place; my saw came with a small sheet of paper gasket material to cut and put between the saw and stand at each bolt when bolting it to the stand to reduce any vibration between the metal to metal and I always use it. These are just some pointers that I thought you may find helpful.




All the best I with your scroll sawing. With a quiet , smooth running saw I am sure you will find it most enjoyable. If you have problems there are many people on the forum that I am sure can help you. I am learning something new all the time from teaching beginners to taking to those with years of experience.




Garryatpa

[Dave56]

Thank you for the information, I just bought this 1994 Hegner m22v every time I get above 1150 or so it vibrates like a paint mixer. I did
everything minus the paper and replacing the connector from the eccentric. I ended up tightening most everything down even the motor was lose.
I can bring the speed up to around 1550 -1600 now since I do not see any real reason to go up to 1700 I think she should be fine.
Thank you for posting this information I am sure that I am not the only one struggling with this problem. Have a Great Day and Scroll away.

[Rolf]

Also keep an eye on the the arm pivot bearing lubrication.

[Dave56]

Thank you Rolf,
By the way have you ever heard of or know someone who made there own tension rod for the m22v?
I noticed my tension rod has a slight bend, Advance m. asking quite a bit for a new one. Just wondering.

[Rolf]

I would just straighten the one you have.
Roll it on a flat surface to see where the high point is. An easy way to straighten a rod is to support each end on a piece of wood near the edge of a bench. then use a clamp from under the bench to the high area of the rod. and tighten. check the rod until it is straight.

[garryatpa]

Dave
Go to The Canadian Woodworking forum (Hegner topic). Red Lee had bought a Hegner M25 and did some work on it himself. It is a single speed earlier model Hegner . His modifications include making a quick release at the tension rod and maybe you can contact him and get the information you require. Hope this helps. As Rolf pointed out maybe just straightening the rod will work. As far as the speed to run the saw at I have a 22V and rarely run it over 1300 spm in the 30 years I have had the saw. I am just more comfortable running it at that speed rather than full speed.

Garry