I'm trying to get an old Meade EQ Starfinder mount working again after the previous owner stored it for >15 years in his garage. The telescope is from 1999, it's a 8" f/6.
The DC drive doesn't work anymore. I had found old batteries that had leaked into the drive assembly cover. Oxydation broke the solder of the encoder light detector and maybe also
the LED. The 2 encoder disks were covered with oil (from the motor gear box? the mount wasn't stored assembled), the fixed disk is clear, but the rotating disk has many slits blocked by
dried oil and oxydation. Not sure this can be fixed. A pb with a similar drive is discussed here https://www.cloudyni...erts-out-there/
The good surprise was to see the red LED of the electronic board turning on when I powered the board with a 12VDC laptop power supply. The motor/encoder system is connected through
a 5-pin connector (JP4 on the picture below or in discussion above) to the board. The motor doesn't move, but I'm able to measure 5V between the black and the red wire, and also 5V between the black and the white wire. 0 V measured between yellow and blue wires (apparently those two are going to the dc motor).
Of course I don't know if this 5V is nominal or not.
- Is it possible to bypass the encoder and supply some given voltage between the yellow and blue wires going to the motor ? I don't care about accurate sideral tracking, I'm only going to do visual observtions but with a working drive if possible.
- how can I remove the motor gear box from the worm gear ? I thought that after removing a small bolt the motor+gear would have been easy to pull out from the worm axis. But no. Is it
seized or is this normal and expected and I just have to pull a bit more ?