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| shipto:
:lol: have you never heard of the Harrison 14 wall mount lathe? :lol: Actually I need to lock the head up to get it turned upright at the moment I am still trying to decide how to keep the head in the top position the options I have concidered so far are springs in various configurations, gas struts or probably my favourite right now counter balance system where some weight is connected over some pulleys to hang down at the back of the upright. Any thoughts would be appreciated. |
| PekkaNF:
Nope. First time ever. I swear. About the counterbalance....that must work: http://www.lathes.co.uk/elliott%20mini%20jig/index.html Pekka |
| shipto:
--- Quote from: PekkaNF on April 15, 2017, 04:37:24 AM ---Nope. First time ever. I swear. About the counterbalance....that must work: http://www.lathes.co.uk/elliott%20mini%20jig/index.html Pekka --- End quote --- Yes that one they have the weights inside the upright which is a good idea but may not be possible in mine due to the supports I have welded inside but maybe if I put a couple of tubes down the sides the weights could travel inside them :coffee: still have to decide if I should fill the body with concrete yet however. The main upright is quite a substantial bit of box section with 5mm walls but it may still have some flex. Actually another idea comes to mind I could just put a guard on the back to cover the weights and leave the inside clear. |
| kayzed1:
You could put the tubes down for the weights and then infill around them. :beer: |
| PekkaNF:
--- Quote from: shipto on April 15, 2017, 05:43:43 AM ---.. :coffee: still have to decide if I should fill the body with concrete yet however. The main upright is quite a substantial bit of box section with 5mm walls but it may still have some flex. --- End quote --- Concrete sucks inside the steel shell...concrete shrinks and when it shrinks it delaminates from the skin fron that on it's just dead weight. If you consider that: read the Bamberg's paper. It's all very good reading, but this is best short story I could find of it from interweb: http://www.mech.utah.edu/~bamberg/research/ConcreteCastDamper/concreteCastDamper.html --- Quote from: shipto on April 15, 2017, 05:43:43 AM ---Actually another idea comes to mind I could just put a guard on the back to cover the weights and leave the inside clear. --- End quote --- Best of all. You can can go trough iterations and finalize the weight. Pekka |
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