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Band saw guidepost alignment

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Forum topic by mandatory66 posted 02-01-2016 10:07 PM 628 views 0 times favorited 9 replies Add to Favorites Watch
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mandatory66

201 posts in 1595 days


02-01-2016 10:07 PM

I have been tuning up my Jet 14” bandsaw and have discovered that the guidepost is not parallel the blade. This means that every time I change the guidepost position upon or down I need to readjust the guides (top guides). This gets to be dreary, especially if you forget to do it. I don’t see any fix for it or anyway to adjust it. Becoming more & more disappointed in my Jet. If anyone has a fix please let me know. The variance is about 1/8 inch in 7 inches of travel.


9 replies so far

View conifur's profile

conifur

955 posts in 617 days


#1 posted 02-01-2016 10:42 PM

How about contacting Jet, nothing better then the source.

-- Knowledge and experience equals Wisdom, Michael Frankowski

View TheWoodRaccoon's profile

TheWoodRaccoon

364 posts in 395 days


#2 posted 02-02-2016 03:31 AM

Does it move forward or backward? (do the guides get farther away from the blade when you raise it, or farther away when you lower it?)

If the guides get farther away when you RAISE the guidepost, stick some thin shim stock in between the castings (where the big bolt is on the frame) BEHIND the bolt to tilt the upper part of the frame forward. If the guides get farther away when LOWER the post, shims go IN FRONT of the bolt to tip the upper casting backward.
Does that make sense to you? If not, i can post some pictures to illustrate.

-- still trying to think of a clever signature......

View johnstoneb's profile

johnstoneb

2145 posts in 1638 days


#3 posted 02-02-2016 03:56 AM

You will find most if not all band saws do this. That is why they have the adjustments on the guides. The manual tells you to check this each time you move the guides.

-- Bruce, Boise, ID

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TheWoodRaccoon

364 posts in 395 days


#4 posted 02-02-2016 04:11 AM



You will find most if not all band saws do this. That is why they have the adjustments on the guides. The manual tells you to check this each time you move the guides.

- johnstoneb

True, but a full 1/8th inch of travel is ALOT. Mine only moves by about 1/64 over 6 inches of travel.

-- still trying to think of a clever signature......

View rwe2156's profile (online now)

rwe2156

2198 posts in 946 days


#5 posted 02-02-2016 01:10 PM

Could be a factory defect or a wheel alignment issue maybe?

It may not be the machine it may be the blade not being plum front to back.

-- Everything is a prototype thats why its one of a kind!!

View splintergroup's profile

splintergroup

829 posts in 687 days


#6 posted 02-02-2016 05:32 PM

I imagine there are several design changes the Jets have gone through, but typically the guide post has adjustments where it is attached to the frame. My (non-Jet) saw has four set screws that allow of adjusting the ‘tilt’ of the post and for zeroing out any twist. It seems that setting the guide post square to the blade over its full travel is one of the first adjustments to do (followed by squaring up the table/miter slot).

View mandatory66's profile

mandatory66

201 posts in 1595 days


#7 posted 02-02-2016 11:47 PM

I have re read the manual and there is no means to adjust the guide post. I will have to adjust the guides when I change the height. I must say that when the guides are adjusted the cut is very good, I can easily make 1/16 inch slices, but I usually make 1/8 inch slices to allow for sanding. The saw is about 11years old and this is the first time I have really paid close attention to tuning it up. Woodraccoon has nailed the issue, in my case the guides move away from the blade and I can see that his solution would correct the issue. I am sure that this is a common problem that goes unnoticed or people just re adjust the guides.I would like to note here that before I added the riser block I never noticed the issue, I added the block about 6 mo ago. It may be something to watch out for for those who will be adding a riser block to their bandsaw.Thanks to all who have responded

View eflanders's profile

eflanders

87 posts in 1315 days


#8 posted 02-03-2016 12:28 AM

Sounds like your riser block addition is the issue then. It may not be machined properly. A machine shop should be able to dress it up properly for you for little expense.

View TheWoodRaccoon's profile

TheWoodRaccoon

364 posts in 395 days


#9 posted 02-03-2016 01:04 AM



I have re read the manual and there is no means to adjust the guide post. I will have to adjust the guides when I change the height. I must say that when the guides are adjusted the cut is very good, I can easily make 1/16 inch slices, but I usually make 1/8 inch slices to allow for sanding. The saw is about 11years old and this is the first time I have really paid close attention to tuning it up. Woodraccoon has nailed the issue, in my case the guides move away from the blade and I can see that his solution would correct the issue. I am sure that this is a common problem that goes unnoticed or people just re adjust the guides.I would like to note here that before I added the riser block I never noticed the issue, I added the block about 6 mo ago. It may be something to watch out for for those who will be adding a riser block to their bandsaw.Thanks to all who have responded

- mandatory66

Glad i could help!

eflanders is right, sometimes the riser block kits aren’t machined properly. You COULD go to a machine shop and have them correct any non-parallelism in the machined faces of the block, or you could shim it instead and save a little change. Whatever you do, let us know how it works out!

-- still trying to think of a clever signature......

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