Vixen Porta Mount ll OnStep install

[Fish]

After converting my LXD75 to onstep and seeing that someone had motorized and fitted Onstep to a Porta mount I had to have a go.

Looking to power from a 12v battery I wanted to keep the power requirement low, managed to find some 36mm 0.9deg 0.46A  steppers on ebay for £3.65 each thinking that they would be a failure but worth a try.

The motors came with 16 tooth GT2 pulleys so decided to order some 60 teeth ones to provide the greatest torque.

Ordered some slightly longer pins to account for the extra plate thickness, the good thing about this mod is that it does not require any mods to the original mount.

Manufactured brackets from aluminium plate and angle that I had and fitted motors. Assembled and fitted to mount. Largest scope that I use on this is a C5 so will use that to set up the config. 

 

[Fish]

Final testing today , just need to box up the cct board.

This is my final config.

[Fish]

Finished the mount , I have it set so that I level the mount , set the scope horizontal and then point it north. In the picture below the solar finder shows how close the first goto was.

Very happy with the results may need a slightly larger battery .