MWF FEED
7th October 2020, 09:50 AM
I’m considering converting my English made Edwards treadle guillotine to pneumatic operation. Problem being Is that I know just enough about pneumatics (and most other things in life) to understand I know nothing about it. Looking around on the inter webs it seems the most common way of doing this is to put a cylinder under the machine that actuates the treadle bar. The mechanism seems simple enough, the forces of actuation and control of those forces, ie the control of the air going in and out I don’t really know much about. I have 8bar (120psi) with around 130litre storage available and the line from the compressor to the guillotine will be less than 2m so loss shouldn’t be a problem.
At this point, if your response is likely this is dangerous don’t attempt it because you know nothing, please find another thread.. If I don’t do, I don’t learn....
In my head I figure I need a two way cylinder so I can control both up and down, I found the cylinder below, seems to have about the right stroke and a stack of mounting hardware attached that will save some fabricobbling but beyond that I have no idea of its suitability for this venture.
https://www.ebay.com.au/itm/Festo-Pn...e/123516764657 (https://www.ebay.com.au/itm/Festo-Pneumatic-Cylinder-Actuator-Ram-DNC-80-250-PPV-A-80-BORE-250-Stroke/123516764657)
Id like a lever valve to operate it (I figure that keeps my hands away from any moving parts) but have no idea how to read the pictographs of operation on the side of them. I’m assuming I’ll need something that can shuttle ports so it can exhaust the side that has pressure when I wish to reverse the direction of travel, ie bring the blade up having just bought it down to cut. As I live in a residential area, I think an exhaust silencer would be a good idea too, assuming I need one.
Im also not sure how to size lines and the like, in my head my rattle gun needs big hose for correct operation but that cylinder appears to have smallish lines, so I’m not sure.
I’ll get a picture of the guillotine and the treadle mechanism later today.
Any help with my quest for understanding would be greatly appreciated.
Read the full thread at metalworkforums.com... (https://metalworkforums.com/showthread.php?t=205749&goto=newpost)
At this point, if your response is likely this is dangerous don’t attempt it because you know nothing, please find another thread.. If I don’t do, I don’t learn....
In my head I figure I need a two way cylinder so I can control both up and down, I found the cylinder below, seems to have about the right stroke and a stack of mounting hardware attached that will save some fabricobbling but beyond that I have no idea of its suitability for this venture.
https://www.ebay.com.au/itm/Festo-Pn...e/123516764657 (https://www.ebay.com.au/itm/Festo-Pneumatic-Cylinder-Actuator-Ram-DNC-80-250-PPV-A-80-BORE-250-Stroke/123516764657)
Id like a lever valve to operate it (I figure that keeps my hands away from any moving parts) but have no idea how to read the pictographs of operation on the side of them. I’m assuming I’ll need something that can shuttle ports so it can exhaust the side that has pressure when I wish to reverse the direction of travel, ie bring the blade up having just bought it down to cut. As I live in a residential area, I think an exhaust silencer would be a good idea too, assuming I need one.
Im also not sure how to size lines and the like, in my head my rattle gun needs big hose for correct operation but that cylinder appears to have smallish lines, so I’m not sure.
I’ll get a picture of the guillotine and the treadle mechanism later today.
Any help with my quest for understanding would be greatly appreciated.
Read the full thread at metalworkforums.com... (https://metalworkforums.com/showthread.php?t=205749&goto=newpost)