Comments on: Pneumatic autovalve

By: Diamondvise

Diamondvise — Fri, 25 Jun 2010 14:35:59 +0000

Great idea! I’m using it just now in my robotic arm. THX Sariel!

By: Sariel

Sariel — Sat, 01 Aug 2009 07:50:27 +0000

@Jeffrey D No, if you adjust gear ratios well the absorbers should be able to push motor back once it stops. I've seen someone doing it with a valve, just can't remember the link.

By: Jeffrey D

Jeffrey D — Fri, 31 Jul 2009 22:27:48 +0000

@Sariel If the shocks are enough to overcome the clutch and push the valve closed when the motor is off, then aren't they also strong enough to just hold it closed while the motor runs? I've been working on this all morning and can't for the life of me find a solution I like

By: Sariel

Sariel — Fri, 31 Jul 2009 08:23:20 +0000

@Jeffrey D Use a clutch gear and two opposing shock absorbers.

By: Jeffrey D

Jeffrey D — Fri, 31 Jul 2009 07:49:40 +0000

Me again, been looking around online for a pf controlled valve that automatically resets to the neutral position when the motor is not running. If you have anything it would be extremely useful, thanks.

By: Sariel

Sariel — Fri, 24 Jul 2009 11:21:46 +0000

@Tom I think there will be a great chance of knobs getting jammed against each other and against the switch.

By: Tom

Tom — Fri, 24 Jul 2009 11:02:11 +0000

This is a fantastic invention, well done! I’m planning to use it soon on a model of a Schaffer wheel loader. I have a suggestion that might improve it – instead of using the single cams for pushing the pneumatic switch could you use a cross shaped 4-way cam, maybe the black technic knob wheel – 32072 – http://www.bricklink.com/catalogItem.asp?P=32072 ?
I think this would minimise the delay in changing the switch direction as it would push the switch with 4X the frequency. I haven’t tried this yet, but what do you think?

By: teunj

teunj — Mon, 11 May 2009 16:28:29 +0000

this idea is great

By: LuVi

LuVi — Fri, 20 Feb 2009 14:19:45 +0000

Nice idea! And thanks for your suggestion on Youtube!