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Question 1: list all the limit switch and encoder combination

incremental encoder/hall effect sensor (routed to odrive) + global encoder (not decided)

sensor?

which axis it is on?

protocol?

2 X magnetic switches

A1

Hall effect

A1

SPI encoder(ABS pos)

A1

SPI

SSI encoder(ABS pos)

A2

SSI

Hall effect

A2

2 X magnetic switches

A2

SSI encoder(ABS)

A3

SSI

Hall effector

A3

2 X magnetic switches

A3

Hall effector

A4

magnetic switches

A4

SPI encoder

A4

SPI

2 X hall effect

A5/A6

2 X SSI encoder

A5/A6

SSI

2 X magnetic switches

A5/A6

TBD : one sensor at least for differential (share the SSI with A5/A6)

Incremental encoder

end effector

Hall effect

end effector

Question 2: TOO MANY WIRES HOW TO MANAGE IT!!!!

Yuchen Lin’s proposal:

three chunk wire → 1. 3 phase wire group (21wire NO GND)

  1. hub (microcontroller) -? simple protocol back to a can bus and deliver power to all sensors

3 hub at least for 1 for a1/a2 one for a3/a4/a5/a6 and last one for end effector

  1. SSI/SPI encoder cable back to the (S1 for a2 and a3) the rest to jetson and a common ground

if a lot of wire back to ebox, color encoding does not work → debug is a pain

SYSTEM LEVEL ISSUE NO ELECTRICAL INVOLVED NO NEW BOARD Saheed Quadri Saheed Quadri

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