2009:Electrical Main 1.17.2009

1.17.2009

Start time: 11:00

End time:

Members present: Michael H., Dave(Apples), Dave(oranges), Rika, Victor, Sean

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Tasks Completed:

• Investigates Shaft Encoder - US Digital E4P-250-250-D-D-D-B

      -Mounts on 1/4" shaft(press on, no set screw required)

      -Mounts with 3-48 screws on flat plate or motor housing

      -Needs +5 V supply, 18 MA for LED, 5 MA, for detector

      -Output V high - 2.4, low - 0.4, with 2.7k ohms Pull-up resistor

      -250 counts per revolution(CPR); at expected motor transmission output RPM of 350, this gives about 2917Hz output.

      -Price - $22.95 - 1, $18.04 - 10

• Investigated a second shaft encoder for larger diameter motor shaft of 0.375" (3/8") which the mechanical subteam prefers
  

     -US Digital E7P-375-S-H-G-3

     -this accomodates .375" shaft and has a thru-hole and extra mounting ears.

     -Price is $43.50 - 1

     -Electrically the same as E4P above, except slightly higher current of 27mA.

     -we don't need a lot of resolution, so we'll get the lowest resolution 180 counts per revolution (CPR) which should give about 2100Hz at 350RPM.

     -outboard mounting ears have 0.116D holes.

• Found a banner sensor. Reciever specs are as follows:
  - Part number: Q10RP6R - Q10 Series: Receiver
  - Range: 1.8 m
  - Input: 10-30V dc
  - Output: Dark Operate (Means that the sensor activates when the beam is broken)
  - PNP
  - Cable length: 2 m (6.5 ft)
  - Price: $36.80
  
• Emmiter specs are here:
  - Part number: Q106E Q10 Series: Emitter
  - Range: 1.8 m
  - Input: 10-30V dc
  - No outputs
  - Cable length: 2 m (6.5 ft)
  - Price: $31.28
  
• Finally re-made the BOM
• Decided that Hopper will have two banner sensors and that the conveyor will not require the full 8 sensors originally talked about.

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Tasks In Progress:

• task
• task

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Tasks to Complete:

• design "homemade" shaft encoder for conveyor motors
• task

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Images & Additional Updates:

File:BOM.xls