SS Power Switch - Conveniently Located

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paulmcohen
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Post by paulmcohen »

dusty wrote:Having completed due diligence, I have placed a Paddle Switch (Safety Switch) at the top of my 'will purchase soon' list.

It is a safety switch (easy off) as well as being capable of 20 amps. What made it really attractive is that only costs $12.85. I have chosen from the Grizzly catalog part number H8243.

http://www.grizzly.com/products/h8243 :D

If you look at the other switch it is only rated to 1/2 HP, that was my concern but the H8243 looks better unless the 20 AMPS is two 10 AMP legs.

Now it is only a question of mounting it, I await ideas.
Paul Cohen
Beaverton, OR
A 1982 500 Shopsmith brand upgraded to a Mark 7 PowerPro, Jointer, Bandsaw (with Kreg fence), Strip Sander, Ring Master and lots of accessories all purchased new
12" Sliding Compound Mitre Saw, 1200 CFM DC
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chiroindixon
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Post by chiroindixon »

I like Doc's design Thank you.....but David Marks had the idea first...The episode showing his shop had it. He stressed the need for a fast, accurate access to the "OFF", while keeping hands on workpiece...or backing up fast. He urged table saw users install the "kick switch".

I realized that my 520 setup often made it cumbersome to get to the "Red Switch". My using a second vacuum floor switch was not smart.....Down I went to the shop for a better safety solution.

but I would like the bar and the switch to sit flush with the front of the SS (storage limitations). I opted for this design because of the physical depth of the switch itself...How to make it flush just is not in my idea bank. As for storage under the machine, I never liked "the shelf" because it collected more dust than anything. I just let it all drop to floor and vacuum.

My arrangement does hinder access to a shelf but so would any other. My design however would still allow those SS cabinets to fit, albeit you would slide them in and access from the backside.

I'm think something like Doc's arrangement but with the switch mounted slightly back of flush with the legs and a flat steel bar that is flush running between the legs of the SS. You would probably have to swing your leg forward to turn it off, but I think this would work.

It's the ease of just bending at the knees to shut down the Mark V that makes this a safe joy to use. Having to kick forward as you would like to either keep both hands on workpiece (encouraged by Marks) or chisel is cumbersome. I have never once had an unintentional shutoff. My stance at the work station is just right.

Try it yourself. Drop a plumbline off the front of the table and see where it lines up with your knees. Should not be any issue.

Bar flush with front of legs also robs you of the fast safety when in drill press mode. With mine, it's a quick flick of my left foot. Not an issue for me having been a motorcycle rider for 40 years. No different than shifting, or my old Brit bikes braking on left.

Guys and gals....Please look hard at this idea and implement. I feel strongly about our safety. If this idea saves one finger or even one bad kickback, I will be thrilled. I'm not claiming a royalty, patent or money.....

I'm more than happy to take more photos ( and forward via Dusty ) should anyone want. Even one of the "ABC" gang.....:rolleyes:

Doc
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dusty
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Post by dusty »

I think you are pulling my leg, Paul. I have already revealed all of the ideas that I have. I solved all of the known problems except where you are to get the angle brackets. If you go out and stare at the inside of your garage door I suspect that you'll might find another place where you can harvest those.

I'd offer to sell you a completed bracket but I already know you won't pay the price; all of the up front design costs are rolled into the price of the first item out the door. Materials are pretty cheap but this engineer works for $60.00 an hour.

A photo refresher on brackets: https://forum.shopsmith.com/viewtopic.php?t=1477
"Making Sawdust Safely"
Dusty
Sent from my Dell XPS using Firefox.
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Ed in Tampa
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Post by Ed in Tampa »

paulmcohen wrote:If you look at the other switch it is only rated to 1/2 HP, that was my concern but the H8243 looks better unless the 20 AMPS is two 10 AMP legs.

Now it is only a question of mounting it, I await ideas.

Paul
Specifications for the switch Dusty referrenced from Grizzly is 35 amps 110 and 20 amps 220. So I think this switch will handle any thing in most workshops.
Ed
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billmayo
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SS Power Switch

Post by billmayo »

Shopsmith used 15 Amp rated ON/OFF switches in most headstocks for many years including the 520 headstocks. The 15 Amp switch contact points is the weak link in the power line due to arcing when being opened (my belief, no arc suppresser). I have replaced many 15 Amp switches with burned, melted or open/welded contacts with 20 Amp switches over many years. I have not found any bad 20 Amp switches. Granted the motor wires and power cord are rated at lower amps but I have never seen problems with either set of wiring. Leaving the headstock switch in the ON position and going to a separate 20 Amp ON/OFF switch should eliminate any future switch problems. A magnetic or safety switch is a great idea for the Shopsmith.

Bill Mayo
dusty wrote:As for the 20 amp switch - you guys all lose me on this one unless you change out the switch that is mounted "IN" the Shopsmith. An add on 20 amp switch does not change the line handling characteristics.

If you want 20 amp capacity - you have to go for it end-to-end. Plugs, wires, breakers, switches - the whole nine yards.
paulmcohen
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Post by paulmcohen »

dusty wrote:I think you are pulling my leg, Paul. I have already revealed all of the ideas that I have. I solved all of the known problems except where you are to get the angle brackets. If you go out and stare at the inside of your garage door I suspect that you'll might find another place where you can harvest those.

I was asking about a design using the Grizzly switch instead of the Shopsmith switch, but I agree you have solved the most difficult problems.
Paul Cohen
Beaverton, OR
A 1982 500 Shopsmith brand upgraded to a Mark 7 PowerPro, Jointer, Bandsaw (with Kreg fence), Strip Sander, Ring Master and lots of accessories all purchased new
12" Sliding Compound Mitre Saw, 1200 CFM DC
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