[SML] Fwd: Chain motor control

[Bill Sapsis]

I stand corrected.

Nicely done, Ford.

Bill S

bill at sapsis-rigging.com<mailto:bill at sapsis-rigging.com>
http://www.sapsis-rigging.com
+1.267.278.4561   mobile

Begin forwarded message:

From: Ford Sellers <fsellers at chauvetlighting.com<mailto:fsellers at chauvetlighting.com>>
Subject: RE: [SML] Chain motor control
Date: May 11, 2017 at 4:48:58 PM EDT
To: Stagecraft Mailing List <stagecraft at theatrical.net<mailto:stagecraft at theatrical.net>>
Cc: Bill Sapsis <bill at sapsis-rigging.com<mailto:bill at sapsis-rigging.com>>

And this:
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From: Stagecraft [mailto:stagecraft-bounces at theatrical.net] On Behalf Of Bill Sapsis via Stagecraft
Sent: Thursday, May 11, 2017 4:44 PM
To: stagecraft at theatrical.net<mailto:stagecraft at theatrical.net>
Cc: Bill Sapsis
Subject: Re: [SML] Chain motor control

Yeah.   What tech dept said.  Once you start getting fancy with movement, you’ll have to start getting fancy with control.
Pickles are not fancy.

Bill

bill at sapsis-rigging.com<mailto:bill at sapsis-rigging.com>
http://www.sapsis-rigging.com<http://www.sapsis-rigging.com/>
+1.267.278.4561   mobile

On May 11, 2017, at 4:17 PM, tech dept via Stagecraft <stagecraft at theatrical.net<mailto:stagecraft at theatrical.net>> wrote:

I have built 8-way controllers (for CM hoists) with individual direction switches per motor (the up-off-down configuration) and a monentary run switch plus a mushroom-head ALL-STOP kill switch. A different controller required the pickle be connected via a long cable for eyeballing trim.
I doubt I would ever do a dual pickle control for simultaneous bi-direction/speed movements. Too many possibilities for injury/damage to occur.


11.05.2017, 21:57, "Brian Munroe via Stagecraft" <stagecraft at theatrical.net<mailto:stagecraft at theatrical.net>>:
On your typical 8 way chain motor controller, you have 2 options for control – The 8 way pendant connected to the controller or a single pickle connected directly to the motor. Anyone ever seen something in the middle?  Specifically talking about motors used for scenery/props storage  where it is not convenient to have all the motors on one pendant, or you don’t want a single pendant to be able to control all the motors.  So maybe on an 8 way controller you would have 2 pieces hung on single motors where a pickle would work for each, and 3 pieces hung on 2 motors where you would want a 2 Way pendant for each one.  Or perhaps 1 at 4 motors and 2 and 2 motors on the controller.   You get the idea.  Multiple motor pendants would still have to have individual control over the motors – not just all motors up or all motors down.

Has anyone ever done anything like this?  I’ve not seen anything available commercially.  Oh, and usually in cases like these the motor assignments change is you figure out the show on site.  Not necessarily something you can perfectly plan in advance.

Thanks,
Brian Munroe


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