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Forum topic by shipwright posted 288 days ago 572 views 0 times favorited 12 replies Add to Favorites Watch
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shipwright

4666 posts in 1300 days


288 days ago

I was in the shop today trying to design a mod to kiefer’s bandsaw sharpening jig to accommodate variable pitch blades (woodslicer). As is often the case with me I got sidetracked. In this case I decided, while I had the blade off the saw, I would investigate why my tension gauge had never worked.
Since new, the gauge’s little red metal indicator has been jammed at the top of its slot when under normal tension but I’ve never needed the thing anyway and the saw ran fine so I’ve never bothered to look into it …....... until today.

Here’s what I found:

Because of fixed points inside the saw it seemed to me that the only way to remedy this would be to shim above the spring by the appropriate amount to bring the little critter down to where it belongs. I added a 1 1/4” piece of heavy wall pvc pipe to see.

Before you ask, I put a similar piece in my metal vice and submitted it to far more pressure and it held up fine. Anyway all re-assembled it was clearly a required part. I should have made it 1 1/2” but it was hard to measure accurately when the little red tab was bent up in the case at the top. In this photo it is showing 1 1/4” when properly tensioned for a 3/4” woodslicer. A 1 1/2 ” spacer would make it show 3/4”. You can also see the crumpled up decal at the top where the indicator used to go.

Has anyone else had this problem? (Delta 18”, 2004 model)
Have I been missing a 1 1/2” spacer for 9 years?

I’ll be interested to hear your answers. Thanks

Paul

-- Paul M ..............If God wanted us to have fiberglass boats he would have given us fiberglass trees. http://prmdesigns.com/


12 replies so far

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DIYaholic

11249 posts in 1177 days


#1 posted 288 days ago

Is it possible, rather than a spacer missing, that it is the wrong size (length) spring?

-- Randy-- I may not be good...but I am slow! If good things come to those who wait.... Why is procratination a bad thing?

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floyd1365

23 posts in 350 days


#2 posted 287 days ago

I don’t have one of those but it looks to me that all that was wrong was the indicator sticker is misplaced. I would not be comfortable with that much compression on the spring. looks like way too much .

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shipwright

4666 posts in 1300 days


#3 posted 287 days ago

Randy, I have no idea but it seems to me that if they were going to make a mistake at the factory, missing a part would be more likely than getting a part that doesn’t belong anywhere on the machine into the production line.
I think It would solve the problem though.
floyd1365, the compression is the same both ways. The only difference is the position of the indicator.

-- Paul M ..............If God wanted us to have fiberglass boats he would have given us fiberglass trees. http://prmdesigns.com/

View sandhill's profile

sandhill

2081 posts in 2426 days


#4 posted 287 days ago

Mine don’t work & has never worked. Now I have an idea what to do. ThanksPaul BTW I have a MEBA (Laguna) made around the early 90s?

-- Bob Egbert AKA Sandhill http://www.sandhillwoodworks.com/

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rance

4106 posts in 1663 days


#5 posted 287 days ago

Yep, the sticker looks to be about a quarter inch too low. Nice ingenuity though. :)

-- Backer boards, stop blocks, build oversized, and never buy a hand plane--

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MrUnix

387 posts in 701 days


#6 posted 287 days ago

The parts diagram doesn’t show a spacer.. and from the pictures, that spring looks like it’s seen better days. I’d be more incline to think it’s the spring than a missing part.

Cheers,
Brad

-- Brad in FL - To be old and wise, you must first be young and stupid

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shipwright

4666 posts in 1300 days


#7 posted 287 days ago

The spring feels the same as it always has and works fine. It doesn’t look like it could have been compressed an inch and a half so I’m at a total loss for an answer. The only problem there has ever been is the position of the indicator.

-- Paul M ..............If God wanted us to have fiberglass boats he would have given us fiberglass trees. http://prmdesigns.com/

View kdc68's profile

kdc68

1704 posts in 779 days


#8 posted 287 days ago

Pretty clever idea. Your idea would get you closer in the ball park. IMO I’d say that deflection of blade (plucking the blade and listening for that tone) is the key indicator and not what the tension gage reads. The correlation between the gage reading and correct tension is not the same for different saws or even different blades on the same saw. Then a couple more variables are the blade stretch and tire wear. My gage is fairly off, using your idea in my situation would help me get the tension closer in the ball park before the pluck test….thank you for sharing

-- Measure "at least" twice and cut once

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floyd1365

23 posts in 350 days


#9 posted 287 days ago

the compression on the spring with the spacer is too much as shown by the sideways movement and the uneven coil spacing. that will wear the threads on the shaft and housing prematurely. were it mine I would make a duplicate sticker, place it where it should have been put over the cut out window and remove the spacer. then if I needed to adjust the spring I would start with shim washers a little at a time.

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shipwright

4666 posts in 1300 days


#10 posted 287 days ago

Sorry, I don’t quite understand. There is no compression on the spring in any of the pictures. What you see is the relaxed position of the spring. As I said above, I can’t imagine that it was ever an inch and a half longer, spring steel just doesn’t do that.

-- Paul M ..............If God wanted us to have fiberglass boats he would have given us fiberglass trees. http://prmdesigns.com/

View Joe Lyddon's profile

Joe Lyddon

7451 posts in 2555 days


#11 posted 286 days ago

Have you thought of calling Delta Tech.Support and asking them?

-- Have Fun! Joe Lyddon - Alta Loma, CA USA - Home: http://www.WoodworkStuff.net ... My Small Gallery: http://www.ncwoodworker.net/pp/showgallery.php?ppuser=1389&cat=500"

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shipwright

4666 posts in 1300 days


#12 posted 286 days ago

Not important enough Joe. It was really just a curiosity and now I have it pretty much put to bed.

-- Paul M ..............If God wanted us to have fiberglass boats he would have given us fiberglass trees. http://prmdesigns.com/

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