Micro Controlled Scratch Built Turntable

I am at the control stage of my scratch built turntable. My intent is to ro
tate the table with a bipolar NEMA 3 motor, via belt and pulley. I am using
an Arduino micro control board in conjunction with a AF motor shield.
Once the sketch is written and loaded into the MC, the bridge rotates to p
redetermined locations via the step indexes of the motor. Returns the bridg
e back to home. Rotate left or right. Control speed for a soft start and st
op of the bridge is written into the sketch. The motor step indexes are acc
urate and returns the bridge to exact location with no mis-alignment of the
the bridge to the tracks.
In present configuration(single button on MC) this only allows for operati
on of one sketch. I need to operate 10 sketches to allow access to all trac
k legs around the turntable.
I am having issues on how to get enough of the necessary pins for the MC,
motor shield and interconnecting a 4*4 matrix keypad and a LCD display.
To work properly each rail section requires its individual sketch with adj
usted parameters and individual execute button.
T button to get to he matrix keypad would provide the grandkids a simple,
push the button that corresponds to the track they want.
Simple solution is to spend 1,500 for a pre built. Whats the fun in that.

Any past experience would be greatly appreciated.
Thank you
Reply to
Jim
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