Cornish Jack | 14/04/2012 11:55:59 |
1228 forum posts 172 photos | G'day all.
I have a Hegner scroll saw which hasn't been used for a few years. Needed to do some 'brown stuff' cutting and purchased a couple of packs of Sandvik blades. So far, I have broken SIX of them and not yet cut any wood!! TIA Rgds Bill |
Keith Long | 14/04/2012 12:27:04 |
883 forum posts 11 photos | Bill Just a thought, have you checked that the top arm is free to move over the same stroke length as the lower - sounds as though the blade is getting seriously over tensioned somewhere in the stroke. Can you wind it through a stroke or two by hand rather than applying power straight off to see if there is any binding? Keith |
Martin W | 14/04/2012 12:31:52 |
940 forum posts 30 photos | Bill You say that you have used this to cut brown stuff in the past, with the same type or similar blades, with no problems. As you say that you are using the same or the same type of blades then has the return arm mechanism become too stiff or slack after lack of use or has it had a knock and become misaligned somehow. If the return arm/spring is not maintaining tension on the blade then it is possible that the blade is becoming loose at some point in the cycle and the system is snatching the blade tight causing it to fail. If too tight then the blade will be over tensioned with the same result. Does the return arm have free movement for the complete cycle of the blade movement, is there a stop and if so is this adjustable to accommodate various blade lengths?
Just a few ramblings Regards Martin
Edited By Martin W on 14/04/2012 12:39:43 |
Cornish Jack | 14/04/2012 14:12:42 |
1228 forum posts 172 photos | Thank you Keith and Martin.
Never really had a close look at the 'workings' but have assumed ("Don't assume, CHECK!" Rgds Bill |
KWIL | 14/04/2012 15:47:01 |
3681 forum posts 70 photos | Go to Hegner UK website, there are illustrated parts breakdown diags that may help. www.hegner.co.uk |
Cornish Jack | 14/04/2012 17:25:27 |
1228 forum posts 172 photos |
Thank you KWIL. That could be most useful. Just an update - I have at last managed to cut wood again!! Thanks to all Rgds Bill |
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