Automate turning of manual rotary switch?
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From: markp on 2 Apr 2010 17:54 "John Fields" <jfields(a)austininstruments.com> wrote in message news:2tmcr59sifnbisqh8v26qh47nlfepo4s67(a)4ax.com... > On Fri, 2 Apr 2010 21:18:52 +0100, "markp" <map.nospam(a)f2s.com> wrote: > > >>Thanks John. I actually haven't seem the real switch yet, but I know >>sometimes these things can require quite a bit of torque to overcome the >>click position. I think I'll need to measure it first so I can choose an >>appropriate R/C servo. > > --- > This is starting to get interesting. :-) > > How ugly can the rig be? > > JF Just about as ugly as it needs to be, this thing is out of site in a control room and there's plent of room as it's an open rack. What they don't want is to modify any of the control logic or wiring as they have a maitenance contract with a third party. I want to come up with a solution that's completely non-intrusive that simply automates the otherwise manually controlled on/off switch. Mark.
From: Phil Hobbs on 2 Apr 2010 18:43 On 4/2/2010 6:09 PM, Robert Baer wrote: > Phil Hobbs wrote: >> For a one-off, I'd be looking at an RC airplane servo and a flexible >> shaft coupling. You can get servos with nice titanium gears and brass >> sleeve bearings for way under $100. The good ones have real genuine >> torque. >> >> Cheers >> >> Phil Hobbs >> > OOOhhhhhhhh! *Real* _metal_ gears??? Almost sounds like 20+year old > surplus stuff. > Where? http://www.servocity.com/html/hs-7950tg_servo.html I lied--it's $120. I bought one for $110 back in January. Cheers Phil Hobbs
From: hamilton on 2 Apr 2010 20:17 On 4/2/2010 2:54 PM, markp wrote: > "John Fields"<jfields(a)austininstruments.com> wrote in message > news:2tmcr59sifnbisqh8v26qh47nlfepo4s67(a)4ax.com... >> On Fri, 2 Apr 2010 21:18:52 +0100, "markp"<map.nospam(a)f2s.com> wrote: >> >> >>> Thanks John. I actually haven't seem the real switch yet, but I know >>> sometimes these things can require quite a bit of torque to overcome the >>> click position. I think I'll need to measure it first so I can choose an >>> appropriate R/C servo. >> >> --- >> This is starting to get interesting. :-) >> >> How ugly can the rig be? >> >> JF > > Just about as ugly as it needs to be, this thing is out of site in a control > room and there's plent of room as it's an open rack. What they don't want is > to modify any of the control logic or wiring as they have a maitenance > contract with a third party. I want to come up with a solution that's > completely non-intrusive that simply automates the otherwise manually > controlled on/off switch. > > Mark. > > How far apart are the positions ? 90 Degrees, 30 Degrees, 120 Degrees This looks like its going to be a Real Rube Goldberg type of operation. :-) hamilton
From: tm on 2 Apr 2010 19:51 "markp" <map.nospam(a)f2s.com> wrote in message news:81n747F9vuU1(a)mid.individual.net... > > "John Fields" <jfields(a)austininstruments.com> wrote in message > news:2tmcr59sifnbisqh8v26qh47nlfepo4s67(a)4ax.com... >> On Fri, 2 Apr 2010 21:18:52 +0100, "markp" <map.nospam(a)f2s.com> wrote: >> >> >>>Thanks John. I actually haven't seem the real switch yet, but I know >>>sometimes these things can require quite a bit of torque to overcome the >>>click position. I think I'll need to measure it first so I can choose an >>>appropriate R/C servo. >> >> --- >> This is starting to get interesting. :-) >> >> How ugly can the rig be? >> >> JF > > Just about as ugly as it needs to be, this thing is out of site in a > control room and there's plent of room as it's an open rack. What they > don't want is to modify any of the control logic or wiring as they have a > maitenance contract with a third party. I want to come up with a solution > that's completely non-intrusive that simply automates the otherwise > manually controlled on/off switch. > > Mark. > If all you want to do is switch it on and off, why not just leave it on and switch the power to it with a relay? T
From: Robert Baer on 3 Apr 2010 13:22
Phil Hobbs wrote: > On 4/2/2010 6:09 PM, Robert Baer wrote: >> Phil Hobbs wrote: > >>> For a one-off, I'd be looking at an RC airplane servo and a flexible >>> shaft coupling. You can get servos with nice titanium gears and brass >>> sleeve bearings for way under $100. The good ones have real genuine >>> torque. >>> >>> Cheers >>> >>> Phil Hobbs >>> >> OOOhhhhhhhh! *Real* _metal_ gears??? Almost sounds like 20+year old >> surplus stuff. >> Where? > > > http://www.servocity.com/html/hs-7950tg_servo.html > > I lied--it's $120. I bought one for $110 back in January. > > Cheers > > Phil Hobbs Thanks!! |