8mm Forum: ELMO GS1200 TAKE UP SPEED QUERY

»	8mm Forum » 8mm Forum » ELMO GS1200 TAKE UP SPEED QUERY

UBBFriend: Email this page to someone!

Author

Topic: ELMO GS1200 TAKE UP SPEED QUERY

Lance Alspaugh
Expert Film Handler

Posts: 152
From: Los Angeles, Ca
Registered: Jun 2003

posted September 20, 2006 04:48 PM

Gentlemen (with special request for Mr. Elmo)

I have an older GS1200 and the Take up Motor speed is adequate enough to keep the film on the reel but not as fast and strong as it should be, resulting in the film being loose on the take up reel. The rewind motor speed seems fine. I have already replaced the motor with a new one and no luck. I notice on the newer models there are adjustment pots for both the Take up and Rewind motors located on the rewind motor side. But on this older version I found none anywhere. Can someone please verify if I am stuck with this slow speed on the older models due to no other way of increasing it. Thanks one and all.

| IP: Logged

Kevin Faulkner
Film God

Posts: 4071
From: Essex UK
Registered: Jun 2003

posted September 20, 2006 05:44 PM

Hi Lance,

I suspect that what you have is a newer motor in the Ver 1 machine. The motors used in the Ver 1 machine with no motor control board are 3volt motors and the motors for the machines with control boards are in fact 6 volt. Put a 6 volt motor in a machine with only 3 volts and you will get low take-up torque.

The correct motor for your machine should have 5V2024 in black letters. If the Motor has 5V2024B & MM-4A on the motor then it's the 6V motor. There are some variations in between with the print being in Green or Blue and these are again 3V motors but with different torques.

There are voltage taps on the mains transformer for this early configuration and as you say in the later machines the taps are dispensed with and replaced with a speed control board.

If you can confirm what is on the motor I might be able to help further and maybe suggest a change in voltage tap if you have the right motor.

A lot of people change these motors without realising that there are in fact three types. They arent really interchangeable.

Kev.

--------------------
GS1200 Xenon with Elmo 1.0...great combo along with a 16-CL Xenon for that super bright white light.

| IP: Logged

Lance Alspaugh
Expert Film Handler

Posts: 152
From: Los Angeles, Ca
Registered: Jun 2003

posted September 21, 2006 07:31 PM

Thanks Kevin. I will check the motors to see which ones they are and report back to you. I think your theory is correct that I have an incorrect motor installed.

| IP: Logged

Lance Alspaugh
Expert Film Handler

Posts: 152
From: Los Angeles, Ca
Registered: Jun 2003

posted September 23, 2006 09:13 PM

For Kevin,

You are correct sir. The motor in the Version One machine has the markings of the 6v motor. Is there any way you know of to adjust anything within the projector to increase speed. I have plenty of spare 6v motors but as you know, there are not too many older motors at 3v and I have none. Thanks in advance.

LA

| IP: Logged

Kevin Faulkner
Film God

Posts: 4071
From: Essex UK
Registered: Jun 2003

posted September 24, 2006 05:09 AM

Lance,

There is one thing you could do which may just get you enough torque on the 6V motor which you have on the take-up. I wont promise anything but its worth a try.

If you look on the mains transformer you should see a “top” row of soldered connections. There are 3 connections in the centre marked 6, 4 & 3. If there is a wire on “3” try moving it to the position “4”. This will give the motors an extra 1 volt and maybe enough to get you out of trouble. If the connection is on the “4” position there is no more that can be done. Yes you could switch the motors over but I think you might find rewind a bit sluggish but it could be worth a try.

A lot of people are unaware that there are two different voltage versions of these motors and therefore could fall into the same trap so it's worth checking the details above when changing these motors.

Let us know how you get on.

Kev.

--------------------
GS1200 Xenon with Elmo 1.0...great combo along with a 16-CL Xenon for that super bright white light.

| IP: Logged

Lance Alspaugh
Expert Film Handler

Posts: 152
From: Los Angeles, Ca
Registered: Jun 2003

posted September 25, 2006 06:22 PM

Hi Kevin,

I am at maximum as the connector is at the "4" already. Its ok as it does the job but the film is not as tightly wound as it should be. I was wondering if it is possible to change out the Version One Transformer with the new one as I have a few of the new ones laying around. What do you think... too complicated or impossible? Thanks.

LA

| IP: Logged

Kevin Faulkner
Film God

Posts: 4071
From: Essex UK
Registered: Jun 2003

posted September 26, 2006 12:58 AM

Lance,

To use the later transformer you would also need to fit a motor control board otherwise you will have no control over the motors and they would then run at full bore. You would also need to replace the rewind motor with one of the later ones so that they are both the later 6 volt type.

Unless you have the motor control board I think the only answer to to live with it like it is.

Kev.

--------------------
GS1200 Xenon with Elmo 1.0...great combo along with a 16-CL Xenon for that super bright white light.

| IP: Logged

All times are Central

Printer-friendly view of this topic

UBB.classic^TM 6.3.1.2