astronomie

Hej all, i have a first generation eq8 mount from Skywatcher/Orion call it what you want. The problem is that the encoder wheel on dec and ra axes are damaged ; the encoder strips that are placed on the wheels have faded and need replacement. Because of this, the motors stop slewing when the corrupted encoder strips pass underneath the laser/ detector chip to which the mount emits a loud continuous noise. My question, where can i find such a replacement encoder wheel or a strip of encoder marks? Thanks for reading