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Author Topic: Eiki speed variation
Jason Moffatt
Expert Film Handler

Posts: 104
From: Denham, Buckinghamshire, UK
Registered: Aug 2014

 - posted August 15, 2018 03:20 PM      Profile for Jason Moffatt   Email Jason Moffatt   Send New Private Message       Edit/Delete Post 
Hi, i have two eiki st/m projectors and one seems to run slightly faster than the other, while its not a major problem its a bit annoying.Both machines are set at 24fpm and with the same 15 min film one plays it about a min faster than the other and every now and again you notice the voice tones seem a bit high on the faster one so i would assume the slower one is running at the correct speed as they sound ok.Is there any way to slightly adjust the motor speed?.Could it be something to do with the motor belt thickness?.

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Nantawat Kittiwarakul
Master Film Handler

Posts: 280
From: Rajburana, Bangkok, Thailand
Registered: Aug 2017

 - posted August 15, 2018 08:11 PM      Profile for Nantawat Kittiwarakul   Email Nantawat Kittiwarakul   Send New Private Message       Edit/Delete Post 
+- 1-2% speed error would be totally common,but not in this case (6.7% fast? [Roll Eyes] ). That is still however not enough for 50/60 Hz issue.
So yes,if it's me I'd try the simplest solution by swapping the belt first. The next suspect would be the motor pulley itself.

BTW if you can somehow find a tachometer to check the actual motor speed,that would give a lot more hints to this problem. [Razz]

Just a lone collector from a faraway land...

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Maurice Leakey
Film God

Posts: 5895
From: Bristol. United Kingdom
Registered: Oct 2007

 - posted August 16, 2018 02:36 AM      Profile for Maurice Leakey   Email Maurice Leakey   Send New Private Message       Edit/Delete Post 
My suggestion is to replace the motor belt in each projector bought from the same source.


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Keith Wilson
Expert Film Handler

Posts: 104
From: England
Registered: Jun 2015

 - posted August 16, 2018 10:56 AM      Profile for Keith Wilson   Email Keith Wilson   Send New Private Message       Edit/Delete Post 
try a new motor capacitor as they effect the motor speed and power greatly

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