Film-Tech Forum ARCHIVE: cinemecanica platter wont take up fast enough

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Posted by Robert D. LaValley (Member # 1867) on 04-30-2006, 03:33 PM:

I have an old booth with a number of cinemecanica platters that wont take up fast enough. it seems like the arms dont have enough back tension. and even if you hit start and try to spin the platter by hand to catch it up it still slows back down and the fail safes drop. some of them just do it intermittently but others its effecting the whole tree. Any suggestions? I've tryed adjusting the speed on with the adjustment on the arm but it really does nothing to change the problem.

Anyone have any used platters I can pitch to my boss to get, these are driving me nutz! hahahah

Posted by Ron Curran (Member # 3631) on 04-30-2006, 08:53 PM:

The speed controls are hidden behind the metal cover over the switch panel. Each circuit card has a trim pot. Turn clockwise to slow and anti-clockwise to speed up. Just very small adjustment will make a big difference. Careful, there is high voltage on those areas.

Good luck

Posted by Robert D. LaValley (Member # 1867) on 05-01-2006, 10:21 PM:

isnt that trim pot only for payout and not take up?

Posted by Nick Scott (Member # 2850) on 05-02-2006, 06:05 AM:

Yes rob thats right.
It sounds like the springs which hold the take up arm tension are getting a bit loose and or old try replacing them watch out for your eyes though they jump out at you. [thumbsup]

Posted by Ron Curran (Member # 3631) on 05-02-2006, 05:54 PM:

I might be stating the bleeding obvious but you can only have one deck switched to take-up. If 2 switches are on take-up the loading deck will not get up to speed.

Posted by Phil Blake (Member # 2012) on 05-04-2006, 01:55 AM:

I have recently replaced some pots on my cinemecanica platters and re timed them , not job to be rushed i might add.

The take up speed can be adjusted by the pot on the bottom of the plate control and or the trim pot on the speed control card as already mentioned.

The take up arm tension spring should have about 900 grams on it , I checked this with a basic set of fish weighing scales.

Posted by Gordon McLeod (Member # 33) on 05-04-2006, 02:05 AM:

It would be handy to post which model of cinemecanica platter this is and have you tried the procedure for timing in their manual?

Posted by Robert D. LaValley (Member # 1867) on 05-04-2006, 07:46 PM:

quote: Phil Blake

The take up speed can be adjusted by the pot on the bottom of the plate control and or the trim pot on the speed control card as already mentioned.

The take up arm tension spring should have about 900 grams on it , I checked this with a basic set of fish weighing scales.

If I adjust the speed via the speed control card it will reverse brain wrap on pay-out, which leads me to believe that the card adjustment is soley for pay-out. And where exactly would be the pot you changed? the only pots I can find are one underneath where the arm attaches to the tree and on the brains themselves (which are removable brains not fixed in the units).

The model is a CN35 platter I believe. I'm not standing right in front of it or I'd get more specific.

The timing instructions are vague and hard to understand, considering unfortunately the manual I have is printed very poorly and the readable parts are in italian.

Posted by Gordon McLeod (Member # 33) on 05-04-2006, 11:17 PM:

Have you contacted the company that installed them
There are many of those platters in daily use so I doubt that unless they have been abused that they will be difficult to maintain or service

Posted by Phil Blake (Member # 2012) on 05-05-2006, 05:37 AM:

the take up arm pot is located at the very bottom of the plate , under a black plastic cover, the take up arm should be moved and held in position about 55cms from the post roller slide , the after unlocking the pot spindle from the arm slowly move it till the plate starts to creep, the tighten it up.

If you are not confident with this follow Gordons instructions and contact the supplier or download a manual from the manuals sections on this site.