After purchasing a second hand 12'dob of ebay(Mistake). i was having a hard time moving it around the backyard so i made the trolly(still unpainted). the wheels came from two red hand trollys from supercheap which worked out cheaper than getting them individually and i got the axels as well. the curved part of the handel also got cut from one of the trollys. the steel frame is solid as i welded every join myself thoroughly. 20mm marine ply base.
the base box was the next idea just cause i wanted some slow motion controll. its all 20mm marine ply. it is hinged at one side with a 10mm stainless shaft and bearings purchased from small parts and bearings here in australia. it has a linear acuator i got from china, ebay again. in different positions it gives me 10-13 deg with variable speed from .4mm/sec to 4mm/second max movement 100mm. i havent done the maths to figure what deg per second it is yet. the base will be fitted with rotational control in the form of a friction motor and two lazy susan bearings so it will still turn freely on one of the bearings( not yet created so ill deal with all those hiccups when i get to them).
the control box is made up of parts from jcar and ebay, it has 3 pwm contollers($12 each, ebay) which give me 10-90%, reversible control of my focuser and base box motors, power is from a 12 volt seald lead acid battery in the base box. and transfered back and forth through 8 pin din plugs. the focuser has its own rj45 pluged lead.
the focuser is made from 2mm alloy plate, belt and pully from miny parts and bearings and a 20rpm motor off ebay. only good for fine focus but i can still use the big nobs for coarse focus.
hope you all like my creations and realise how much work ive put into them.
any suggestions for improvement would be appreciated also.