Subject:
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Re: RC control on Pneumatics, gearboxes and polarity switches
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Newsgroups:
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lugnet.technic
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Date:
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Wed, 9 Aug 2000 08:06:56 GMT
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Viewed:
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1804 times
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> You just build the compressor, and for gods sake - don't use the air
> tanks! They're great when used with the handpump, but can ruin almost
> any compressor design. Take a look at the compressor in that awesom
> "claw truck" (can't remember the set number, but I'm sure others can)
It's 8868 I reccon, the same set that gave me the idea to this whole
project :)
I did build a compressor yesterday with a 'medium' sized old-style
cylinder. I used two old style 9v motors and I didn't like the weak
performance of the pneumatics.
I needed two engines in order to get a reasonable speed of the
compressor aswell as strenght enough to turn the compressor when the
pneumatics had a load or when the switches were all centered.
Is the new-style pneumatics better then the old style? I mean from a
power point of view. I got the old kind with but one hose connection.
I'm planing on eating pasta the rest of the month so that I can get
the Tow Truck *today* LOL Hope my g/f also think that is necessary :)
Is there a difference in the switches? It doesn't look like it, I've
been doing some research but everyone on the net is festuruing the
new-style pneumatics.
I reccon there must be a difference since the old 2x4 direction brick
is no longer needed. Does the switches direct the air instead? I mean,
is there an 'in' and an 'out' port on the switch?
> use the plastic tubing along the
> arm, and hose over the joints. there's lot's of tupe in 8462.
That is a great idea! So, one can actually use those to something good
:)
I can't half the tubing as-is since I use the old-style pneumatics
with one hose per cylinder. An advantage actually, but the performance
is poor, perhaps they all are...
> > I will try to take some detail photos of a real life truck so that I
> > can study how they actualy are built. I know of two in my area.
> Choose one with a large cabin:) You'll need the space:)
Yeah, I do need the space. I glued a medium sized pulley wheel to one
of the servos and started testing control of valves and gears
yesterday. It got huge! I think I'm going to need all the space on the
back of the truck (where the lumber goes) just to fit the servos and
such. I'd better build a trailer too :)
I also called LEGO Service, Sweden yesterday but they don't work after
four o'clock, I'll try again today :)
Have a nice day :)
/Tobbe - http://lego.arnesson.nu
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