Precise Camera Panning with Stepper Motors

  
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The prototype circuit board used an external LCD display that received commands via an RS-232 interface. Although it worked well programming it was cumbersome. For this reason the circuit board was revised so that it would support a directly attached LCD display. This view of the back of the board shows the LCD connector more clearly. It also show
Precise Camera Panning with Stepper Motors - schematic

s the amount of rewiring that was necessary to repurpose the circuit board which was designed for another project. The plug in the lower right goes to the 6 pin stepper motor cable. The USB plug at the left goes to the Canon camera`s USB connection via the connecting cable that came with the camera. Pressing 1 on the TV remote starts shooting, 2 allows you to adjust the position of the camera and 3 lets you change variable values. Note the that variables are shown in line 4: d=Degrees, s=Steps, p=Pause before / after shot and c=0 for clockwise and c=1 for counterclockwise. The setting screen allows you to change the variables in the program. Pressing 1 allows you to enter a 4 digit number of degrees X 10. That means to enter 0450 for 45 degrees or 0225 for 22. 5 degrees. The Shoot delay is the pause time before and after a shot is taken. It allows any motion of the tripod to settle and also allows for time exposures. It is a 2 digit number in seconds. If you enter 10 the system will pause for 1/2 of the time (5 seconds) before shooting and an additional 5 seconds after shooting. `9-12-2008 version 3-5 - WORKS `on green speedo board with H-bridge `works properly with 6 wire stepper (old hard drive ) `working well with Hurst motor - 3600 steps per revolution rather than ` advertised 14400 - four steps per pulse, I would guess ` needs pause in "step 1" routine to develop proper torque INCLUDE "modedefs. bas" cmcon=7 `allows...



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