 | | Re: JCB JS220 Excavator —Ross Crawford
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| | | (...) Thanks for another great write-up Jen - and another great model! Been looking forward to the details :) One question I have though - did you investigate using an adder-subtracter in the base? using the centre axle for drive and the clutch (...) (21 years ago, 25-Nov-03, to lugnet.technic, FTX)
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| | | | | Re: JCB JS220 Excavator —Jennifer Clark
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| | | | (...) I have done some tests in the past with adder-subtracter based tracked vehicles and have two major problems with them. The first is that in straight line travel you are only getting the benefit of one motor driving the tracks, whereas with the (...) (21 years ago, 25-Nov-03, to lugnet.technic, FTX)
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| | | | | | Re: JCB JS220 Excavator —Ross Crawford
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| | | | (...) Hmmmm you may be right - I'm still disappointed you didn't implement automatic bucket release though ;) And have you seen those new mini excavators that have the ability to move the dipper assembly sideways? they have a sort of parallelogram (...) (21 years ago, 27-Nov-03, to lugnet.technic, FTX)
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| | | | | | Re: JCB JS220 Excavator —Jennifer Clark
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| | | | (...) One of these days :-) It is probably doable with the small pneumatic cylinder. (...) I came across this when building the JS70 model on my website, the datasheet mentioned a "parallel offset boom" and I had no idea what it was until I asked (...) (21 years ago, 28-Nov-03, to lugnet.technic, FTX)
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