Bandsaw Blade Tension Safety Switch - Router Forums
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post #1 of 11 (permalink) Old 01-17-2018, 03:56 PM Thread Starter
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Default Bandsaw Blade Tension Safety Switch

Just once, I forgot to tension the blade before turning the bandsaw on. Don't want to do that again.

For less than $10, I bought a push-button limit switch similar to the one on the blade brake. A block of wood acts as a spacer to hold the switch in the proper position. I Drilled and tapped the back of the saw case to hold the block in place. I wired the tension switch in series with the blade brake switch. Now the motor won't start unless the blade is tensioned.
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“We should be careful to get out of an experience only the wisdom that is in it and stop there lest we be like the cat that sits down on a hot stove lid. She will never sit down on a hot stove lid again and that is well but also she will never sit down on a cold one anymore.” - Mark Twain
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post #2 of 11 (permalink) Old 01-17-2018, 04:38 PM
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Nice work, Andy! How's it work? Looks foolproof to me. Laguna should use that and pay you in saw blades!

David
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post #3 of 11 (permalink) Old 01-17-2018, 05:24 PM Thread Starter
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Nice work, Andy! How's it work? Looks foolproof to me. Laguna should use that and pay you in saw blades!

David
How's it work?? If you mean does it work well, yes it does. The blade tension lever must be at the limit of its travel or the saw won't start.

If you mean "how" does it work, it interrupts the current to the magnetic coil that keeps the motor switch engaged. This push-button switch has 3 terminals. One is "Common", one is on when the button is pushed, the other is on when the button is released.
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“We should be careful to get out of an experience only the wisdom that is in it and stop there lest we be like the cat that sits down on a hot stove lid. She will never sit down on a hot stove lid again and that is well but also she will never sit down on a cold one anymore.” - Mark Twain
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post #4 of 11 (permalink) Old 01-17-2018, 07:35 PM
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Yes, I meant how well does it work but I didn't phrase that correctly, did I? I understand the electrical part.

But the electrical explanation may help someone who doesn't understand that part so good response on both counts - thanks!

David

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post #5 of 11 (permalink) Old 01-25-2018, 02:11 PM
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Good solution.

The reason I have what you want is, I never lent it out before.

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post #6 of 11 (permalink) Old 01-25-2018, 02:44 PM
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Nicely done...

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post #7 of 11 (permalink) Old 01-25-2018, 03:19 PM
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I like it. Nice and simple but still very effective.

Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.
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post #8 of 11 (permalink) Old 05-21-2018, 12:04 PM
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Very slick! I may adopt that. I started my Laguna untensioned one time. The blade came of as soon as I started cutting. I thought I had broke the 150.00 Resaw King blade but it was OK, Whew! Now I keep a stick on the table with "blade tension off" wrote on it. I lay it aside when the blade is tensioned.
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post #9 of 11 (permalink) Old 05-21-2018, 02:15 PM
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Nice idea on the switch. But for my little bandsaw kept in the shop, a simple sign would help. Maybe attach it to a short wire so I can flip it away without losing track of it. I think you should suggest this to Laguna.

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post #10 of 11 (permalink) Old 05-21-2018, 07:14 PM Thread Starter
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Nice idea on the switch. But for my little bandsaw kept in the shop, a simple sign would help. Maybe attach it to a short wire so I can flip it away without losing track of it. I think you should suggest this to Laguna.
I went to Laguna's web site and submitted a message to customer service suggesting they add a stop switch on the blade tension lever. No reply.

“We should be careful to get out of an experience only the wisdom that is in it and stop there lest we be like the cat that sits down on a hot stove lid. She will never sit down on a hot stove lid again and that is well but also she will never sit down on a cold one anymore.” - Mark Twain
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