Building a Treadle Saw from my old Pole Lathe

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Building a Treadle Saw from my old Pole Lathe

Postby mstibs » Tue Jan 01, 2013 3:27 pm

First project in 2013 ... not ready yet but working so far. The refinements will be done over the next week.
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This band saw is the thing I want to replace with a foot powered device.
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In the chaos-corner in my workshop sleeps the old pole lathe together with power tools. You could count their usages last year on two hands. 1st thing was cleaning the corner.
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On to the saw table: The poppets are the base. So it's still removable. Two posts screwed to the inside and two 60 cm long boards go on the posts.
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You need to drill a hole for the saw blade. Make sure it's in the center of the lathe width.
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For the treadle I reused an old girdle as hinge.
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Finding the point for fastening the treadle chord was done with a makeshift lead. I put the treadle on its highest point, marked where the lead came down and drilled a hole 1-2 cm to the left.
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That's the top frame at its lowest point. The length of the sawblade holder needs to be accordingly. The left and right of the frame will run in rails for guidance. The test showed, the frame height is much too short for guidance and wobbles a lot. I need to replace the sides with longer slats. The table is asymetric.
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The sawblade holder is oak leftover and was quickly turned on my other pole lathe.
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next post two more pictures...
Last edited by mstibs on Tue Jan 01, 2013 4:08 pm, edited 3 times in total.
Saxons. Were good wood-turners, they had to be because they were poor potters...from "A Short History of Woodturning with the Pole-lathe" by Brian G. Howarth; My bilingual (de/en) Blog: http://mstibs.wordpress.com
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Building a Treadle Saw from my old Pole Lathe, part 2

Postby mstibs » Tue Jan 01, 2013 3:29 pm

the last pics:
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That's the current setup with the rails screwed to the bungee posts. It works so far, I just have to: a) get new bungees...these are badly worn, b) add longer guidance slats, c) replace the treadle hinge with steel since it wobbles like a cows tail, d) play with different ways of fastening the top frame to the bungee since it's all not stable enough.
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Last picture shows the lower wire loop in the saw blade for pulling it down.
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Any hints are appreciated!
Thanx and a happy new year to all.
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Saxons. Were good wood-turners, they had to be because they were poor potters...from "A Short History of Woodturning with the Pole-lathe" by Brian G. Howarth; My bilingual (de/en) Blog: http://mstibs.wordpress.com
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Re: Building a Treadle Saw from my old Pole Lathe

Postby gavin » Tue Jan 01, 2013 6:09 pm

Any chance of video to get an overall impression? Esp a video of it in attempted operation.
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Re: Building a Treadle Saw from my old Pole Lathe

Postby mstibs » Tue Jan 01, 2013 7:34 pm

gavin wrote:Any chance of video to get an overall impression? Esp a video of it in attempted operation.

I'll try to make one after I made my intended changes and see if it's stable enough.
Saxons. Were good wood-turners, they had to be because they were poor potters...from "A Short History of Woodturning with the Pole-lathe" by Brian G. Howarth; My bilingual (de/en) Blog: http://mstibs.wordpress.com
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Re: Building a Treadle Saw from my old Pole Lathe

Postby Davie Crockett » Tue Jan 01, 2013 10:17 pm

I'm loving that concept Stibs! Food for thought!
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Re: Building a Treadle Saw from my old Pole Lathe

Postby mstibs » Tue Jan 01, 2013 11:59 pm

Davie Crockett wrote:I'm loving that concept Stibs! Food for thought!


It's not my own idea: http://www.youtube.com/watch?v=rWkXWueCh0g ... but laziness to start from scratch, lack of space and a spare pole lathe got me thinking that I already have the base standing in the workshop.
Saxons. Were good wood-turners, they had to be because they were poor potters...from "A Short History of Woodturning with the Pole-lathe" by Brian G. Howarth; My bilingual (de/en) Blog: http://mstibs.wordpress.com
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Building a Treadle Saw ... Changes are made, it works!

Postby mstibs » Wed Jan 02, 2013 6:30 pm

Okay, the video upload is at 70%. Meanwhile I post the pictures.
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I replaced the treadle hinge with a steel one. The treadle doesn't swing anymore.
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Added longer slates to the upper frame. It's stable now.
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Since it weighs quite a bit, two worn bungees are not enough to pull it up. Four new bungees do the work.
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Instead of a hole, the saw blade runs now through a simple slit. This adds guidance.
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Now it works as expected. I just need a new saw blade for wood. I have a metal blade fitted and so it's quite slow.
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And now the first video I ever made: http://youtu.be/jJ1O-L8J1y0
Please excuse my german accent, the spelling mistakes/lack of words (I already noted two or three while reviewing.) and the pauses ... I was searching for the right words since I spoke unprepared.

Cheers!
STIBS
Saxons. Were good wood-turners, they had to be because they were poor potters...from "A Short History of Woodturning with the Pole-lathe" by Brian G. Howarth; My bilingual (de/en) Blog: http://mstibs.wordpress.com
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Re: Building a Treadle Saw from my old Pole Lathe

Postby SeanHellman » Wed Jan 02, 2013 10:15 pm

Well done, interesting device, I have seen large fretsaw machines made like this as well. I have been thinking about making one for years, but as normal work gets in the way. If I ever get some woodland then I will build it.
Does the blade go from side to side a bit because it is attached to the treadle? I would have either built the blade into a frame which slides up and down or have made a a horizontal slide bar like the top one.

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Re: Building a Treadle Saw from my old Pole Lathe

Postby mstibs » Wed Jan 02, 2013 10:47 pm

SeanHellman wrote:Does the blade go from side to side a bit because it is attached to the treadle? I would have either built the blade into a frame which slides up and down or have made a a horizontal slide bar like the top one.

Indeed, the blade has side movement (2.5-3cm). That's why I replaced the hole where it went through the table with a simple slit. So it's stable above the table and the lateral movement is on the underside. This may stress the blade. I'll have to watch this.
SeanHellman wrote:How many frames saws does a man need? what do you use them all for?

Rhetorical question? :?: I wanted to replace the electric bandsaw with this foot powered since I've seen the video (http://www.youtube.com/watch?v=rWkXWueCh0g) on youtube. And now I had the time. The workshop gets de-electrified step by step and the result is this frame saw. 8)
Cheers!
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Saxons. Were good wood-turners, they had to be because they were poor potters...from "A Short History of Woodturning with the Pole-lathe" by Brian G. Howarth; My bilingual (de/en) Blog: http://mstibs.wordpress.com
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Re: Building a Treadle Saw from my old Pole Lathe

Postby AlexanderTheLate » Thu Jan 03, 2013 2:28 am

Nice.
I saw an episode of the Woodwright's Shop where Roy Underhill demonstrated a similar set up, http://www.pbs.org/woodwrightsshop/video/2700/2710.html, it's around the 3:20 mark. I have thought about doing a saw like this my self, but I would rather make the saw frame attachable and detachable to a regular pole lathe.
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