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 Technic / 11670
  Re: JCB JS220 Excavator
 
(...) Hi Tobbe The functions aren't 'digital like", I know because I too have a digger just like Jennifer's. You can move the sticks slightly and get a proportional output. I built my model to test the dual axis control mechanism I came up with that (...) (21 years ago, 25-Nov-03, to lugnet.technic)
 
  Re: JCB JS220 Excavator
 
(...) I'd agree with this, it is possible to control the pneumatic valves so that more or less air gets through them. Rather than the problem with pneumatics being of digital in nature, to my mind the biggest problem is their elastic or springy (...) (21 years ago, 25-Nov-03, to lugnet.technic)
 
  Re: JCB JS220 Excavator
 
(...) I recind my comment about you needing practice :-),wet sand is the worst type. (...) Thats an even better idea I might borrow (blatantly steal :-) it! Steve (21 years ago, 26-Nov-03, to lugnet.technic)
 
  Re: JCB JS220 Excavator
 
(...) Yeah, I know, I know. But "digital like" was a term that I figured most people would understand, and perhaps even apriciate if your initials are K.C. :) Then enters the "ooh, I can beat this foreign kid in the language game"-brat... :P Heck, (...) (21 years ago, 26-Nov-03, to lugnet.technic)
 
  Re: JCB JS220 Excavator
 
(...) A comment on how you might be able to control the speed of pneumatics is to add an orifice to both of the line of the cylinder. This would regulate the amount and speed of the air entering and leaving the cylinder. Hope this gives you some (...) (21 years ago, 12-Dec-03, to lugnet.technic)
 
  Re: JCB JS220 Excavator
 
(...) I keep most of them built up these days, you are right, it is definitely hard to take these apart, they take months to build... Really the only time I think about taking a model apart is when it is superceded by a better one. Jennifer (21 years ago, 12-Dec-03, to lugnet.technic)

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