Quote:
Originally Posted by bobson
Bojan,
No worries mate, I got that important parts you mentioned from FarCircuit and the rest from Jaycar, board and chip from Simon. EK box is already finished. Shopping for encoders now 
BTW, What do you think about this encoders from Ebay that Martin posted:
http://cgi.ebay.com.au/Oak-Grigsby-R...item5acfd0836c
Brand new rotary encoder
Manufacturer: Oak / Grigsby
Model: 91Q128-43-00110
128 pulses per revolution
2 channel full quadrature encoding
1" square body with a sealed enclosure
1/4" diameter shaft, .4" long
4" cable terminated with a 4 pin female plug |
This link did not work either today (try this one directly copied from Martin's post:
http://cgi.ebay.com.au/Oak-Grigsby-R...item5acfd0836c).
It seems it is not optical (has mechanical contacts - brushes), which is not bad as such. Maybe not as reliable as optical, but then, the application on telescope (which moves slowly compared to some other machinery) is not mechanically demanding.
Wether it is good (in terms of resolution) that depends, you will need additional gearbox or pulley-belt system to obtain required number of tics/rev of the mount shafts.
However, for Bartel's, resolution is 5000 ~ 10000 is quite enough. So you only need 10 ~ 20x (I have ~20, 6mm roller on 120mm wheel, friction).
I am planning to use timing belts and pulleys in the near future (from old printers... ).
Malcolm, how did you connect your inclinometer to PC? I am not sure it has quad outputs...