not much headroom

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not much headroom

Postby Baggy » Sun Sep 30, 2012 9:39 pm

Hi all

Re my bowl lathe, I do not have much headroom in the shed that I will be using so I wonfered if any suggestions for low roof bunjy fitting, even better photos would be great please.
Best wishes
Mark
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Re: not much headroom

Postby Paul Thornton 2sheds » Sun Sep 30, 2012 10:05 pm

Dig a hole! :D
learning more every day
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Re: not much headroom

Postby Baggy » Sun Sep 30, 2012 10:24 pm

Paul Thornton 2sheds wrote:Dig a hole! :D

Genius!!!!!!
I may wait for some other suggestions first though
Best wishes
Mark
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Re: not much headroom

Postby gavin » Mon Oct 01, 2012 8:35 am

refer other posts re bodgers muddle or bedsit spring return device by Des Jones or bobbin
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Re: not much headroom

Postby anobium » Mon Oct 01, 2012 8:37 pm

Why not attach the bungy to the base of the lathe, at floor level? You will have an extra half turn on your mandrel but that is no bad thing.
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Re: not much headroom

Postby JonnyP » Mon Oct 01, 2012 9:12 pm

Pulley on the roof/ceiling, bungey fixed to the floor and to your drive cord..
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Re: not much headroom

Postby Bob_Fleet » Tue Oct 02, 2012 9:01 pm

Way, way back there was a bungee device which you stood on.
It was inside a flat box shape about 2 " high which also formed the plate you stand on to pedal. A bit like a large pizza box.
It had the bungee and some pulleys horizontally then one at the front where the cord came out and went up to the work. From there it went to the tip of the pedal.
It had a bit of friction and both cords pulled the work down so it could wear the spindles into the work a bit.
Can't find it just now but someone else might remember it.
My friend Jay made one so I'll see if he can remember the source too.
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Re: not much headroom

Postby Baggy » Wed Oct 03, 2012 12:15 pm

Hi all

I like the pulley idea, I have had a measure and I have seven feet two inches height

plan A - any thoughts?
Image
Best wishes
Mark
----------------------------
I can spell but I cannot type.

Photos of the Chelmer and Blackwater canal
http://markbaigent.zenfolio.com/chelmer_blackwater
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Re: not much headroom

Postby nic » Wed Oct 03, 2012 1:18 pm

Looking at is from a mechanical point of view, I think it is over complicated. If you have one bungee the centre cord would probably track left / right. If you have two bungees it may do the same unless they are totally evenly balanced. I ( well not me cause I'm never going to use a pole lathe) would put the right hand green pulley directly over the blue cord and attach the red cord to it. It will would make the bungee seem more powerful but I am sure you can mess with tension/ rate quite easily.
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Re: not much headroom

Postby Baggy » Wed Oct 03, 2012 1:38 pm

Hi Nic

That makes sence, I could move both pullys to the left

Image
Best wishes
Mark
----------------------------
I can spell but I cannot type.

Photos of the Chelmer and Blackwater canal
http://markbaigent.zenfolio.com/chelmer_blackwater
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Re: not much headroom

Postby paul atkin » Wed Oct 03, 2012 1:51 pm

Hi Mark, looks all too complicated to me, my bungee is 8ft high and reckon if it dropped to 7 ft 2 it would still work ok. put a couple of closed hooks in the roof about 5ft apart running parallel with your lathe bed. string across a couple of strands of 10mm bungee. use a spring loaded carrabiner to attach your strap directly to bungee. This way you can slide it along the bungee when you turn the bowl around to remove the inside.
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Re: not much headroom

Postby simon » Thu Oct 04, 2012 2:56 pm

I also have low headroom for my lathe.
So I did this viewtopic.php?f=1&t=118&start=15
So the cord goes up over the wheel and forward (from the turners point of view) to some fixed point. Easy to adjust the ratio of string to bungy.
Make it, mend it, wear it out,
Make it do or do without.
FB Simon Lamb Green woodwork
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