Inverted chain motors

bob u

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Jul 25, 2010, 9:34:21 PM7/25/10

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Anybody an CM expert on chain motors?
I was recently setting up a gig where we were using 1 tons inverted
to pull up stacks of Vertecs.

A couple of them pissed and moaned and acted like a bad connection.
Talking to other people latter, i guess these are designed to be
used in one orientation, and there is an industrial model that will do both?

What exactly is the issues of inverting a stock entertainment CM?
Relay contacts or ?

bob

Audio1

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Jul 25, 2010, 9:43:22 PM7/25/10

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In many units there's a cutoff switch that shuts off the motor if it
tips too far away from the expected angle of use. If you want to use
them inverted you have to open them up and turn the switch over.

Joe Kotroczo

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Jul 26, 2010, 3:29:10 AM7/26/10

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On 26/07/2010 03:34, in article i2iomt$s9o$1...@speranza.aioe.org, "bob u"
<so...@inetnebr.com> wrote:

Isn't "inverted" which apparently is rigging speak for "chain up, motor
down" the standard config of the CM Lodestars?

I know some of them can be used both ways, "inverted" and "non-inverted",
but I don't know if that's an optional feature.

--
Joe Kotroczo kotr...@mac.com

bob u

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Jul 26, 2010, 3:58:18 AM7/26/10

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Inverted is hook up, chain down. Most arena rigging is done by dragging
the chain up to the steel, so standard config for entertainment chain
motor is chain up, hook down. Its a lot easier to pull up a chain than
a 1 or 2 ton chain motor to the steel...

Sometimes in a real grided theater you will see a chain motor dragged up
to the grid and used chain down.

bob

Bob Quintal

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Jul 26, 2010, 9:42:24 AM7/26/10

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Joe Kotroczo <kotr...@mac.com> wrote in
news:C87305E6.C5CB8%kotr...@mac.com:

CM Lodestars used in manufacturing, vehicle maintenance and warehousing
are used motor up, and that is the standard configuration. The "Rock &
Roll" option inverses the action of a safety brake pawl so that the
motor can climb its own chain. (disclaimer: I don't work for CM)

Denny Strauser

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Jul 26, 2010, 6:16:58 PM7/26/10

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Check out this link:
http://www.cm-et.com/pubdocs/troubleshooting/02.%20Rigging.pdf

- Denny

Bob Quintal

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Jul 27, 2010, 6:07:42 PM7/27/10

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Denny Strauser <dsdenn...@gmail.com> wrote in
news:i2l1gs$2le$1...@news.eternal-september.org:

Thanks. My info obviously predated August 1998. Actually, it must
have been in the '80s that I was shown how to invert the contactor
box.

Tim Perry

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Jul 27, 2010, 8:28:08 PM7/27/10

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"bob u" <so...@inetnebr.com> wrote in message
news:i2iomt$s9o$1...@speranza.aioe.org...

I seem to recall hearing the chains in Spain are used mainly on the vertical
plane.

bob u

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Jul 27, 2010, 8:43:02 PM7/27/10

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Next your going to be telling me you toured with
"alice in chain motors...."

bob

Tim Perry

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Jul 27, 2010, 9:42:51 PM7/27/10

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"bob u" <so...@inetnebr.com> wrote in message

news:i2nuep$3m0$1...@speranza.aioe.org...

only if i could provide a link...