Hi Brendan,
Many thanks for taking the time to help me out. It is very much appreciated.
The battery is brand sparkling new so I like to think that it is ok.
I have played with the mount following your mail and here are the finding.
1. Mount does not drive with the 12 volts battery
2. Mount works fine with the power supply. (240/13.8 volts)
3. RA motor works with battery
4. DEC motor does not work with battery but fine with power supply.
I have also this morning readjusted the worms in order to give a little bit more clearance. Maybe it will help. I clutching at straws.
Some history for the mount. I purchase the mount in march 2014 from a lady whose husband died prematurely. He has bought the mount for his retirement and never used it. The mount is 7 years old but only in used since I had it. When I received the mount it was in its original packaging and I could see that it was brand new. The setting of the elevation was still set for California and you have to use various spanners to allow the mount to be used in around 45 degrees north.
The mount is a Losmandy Titan 50:1
The eprom is 1.04 and I ordered today the 1.05. I don't think it will change anything but it is cheap enough.
The motors I am told by Ovision that they are the early type.
The mount never worked properly and have been sent to Ovision twice without any improvement. However Ovision is telling me that the mount is working perfectly.
Where do I get the Gemini PCB's version?
The jumps do affect the image and I am limited to a maximum of 600s exposure. After that time the image get to degraded to be useful.
At present I am using an equinox 120 and a Borg 72 for imaging and guiding so the weight is very much bellow the carrying capacity.
The image posted have been taken with a variety of instrument and the mount I used before the Titan was a Mesu 200. It was the biggest mistake of my life selling it.
Once again thank you for your help.
Vince