Mini camera jib cable pulley system plans? at DVinfo.net

Alex Knappenberger · August 19th, 2003, 12:56 PM

Hey, does anyone know where I can see some good pictures of how the pulley systems on some small jibs work, or some plans for it? I have a pretty good idea, I know the pulley at the tripod mount can't move, and when you tilt the jib, it keeps the camera level. Right? I'm no engineer, or machinest, or whatever, but i'm not all that dumb either, but I don't understand where you put the bearings at, for smoooooth movement, heh. I DO know how bearings work though. :D

I'm going to whip up a tripod mount plate and a camera plate thing, whenever I can figure this out. :)

Thanks.

Rob Lohman · August 20th, 2003, 09:53 AM

You can use a cable system to keep the jib level. Then you can
also use a cable/pulley system to operate the head remotely.
I'd guess you need bearings to keep this all running smoothly.

Mike Rehmus · August 20th, 2003, 11:59 AM

On the axle mounting the arm to the tripod plate and on the arm to the camera plate, you should use thrust bearings to avoid too much friction. They can probably be just brass washers but without them, the system won't move as smoothly as it can or should.

Even my really cheaply constructed Cobra Crane uses needle thrust bearings.

August 19th, 2003, 12:56 PM	#1
Alex Knappenberger High School Student Join Date: Apr 2003 Location: Canton, Ohio, USA Posts: 609	Mini camera jib cable pulley system plans? Hey, does anyone know where I can see some good pictures of how the pulley systems on some small jibs work, or some plans for it? I have a pretty good idea, I know the pulley at the tripod mount can't move, and when you tilt the jib, it keeps the camera level. Right? I'm no engineer, or machinest, or whatever, but i'm not all that dumb either, but I don't understand where you put the bearings at, for smoooooth movement, heh. I DO know how bearings work though. :D I'm going to whip up a tripod mount plate and a camera plate thing, whenever I can figure this out. :) Thanks.

August 20th, 2003, 09:53 AM	#2
Rob Lohman RED Code Chef Join Date: Oct 2001 Location: Holland Posts: 12,514	You can use a cable system to keep the jib level. Then you can also use a cable/pulley system to operate the head remotely. I'd guess you need bearings to keep this all running smoothly. __________________ Rob Lohman, visuar@iname.com DV Info Wrangler & RED Code Chef Join the DV Challenge \| Lady X Search DVinfo.net for quick answers \| Buy from the best: DVinfo.net sponsors

August 20th, 2003, 11:59 AM	#3
Mike Rehmus Wrangler Join Date: May 2002 Location: Vallejo, California Posts: 4,049	On the axle mounting the arm to the tripod plate and on the arm to the camera plate, you should use thrust bearings to avoid too much friction. They can probably be just brass washers but without them, the system won't move as smoothly as it can or should. Even my really cheaply constructed Cobra Crane uses needle thrust bearings. __________________ Mike Rehmus Hey, I can see the carrot at the end of the tunnel!