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Direct current control #19

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laurb9 opened this issue Mar 5, 2016 · 3 comments
Closed

Direct current control #19

laurb9 opened this issue Mar 5, 2016 · 3 comments
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laurb9 commented Mar 5, 2016

Investigate ways to control Aref (and motor current) dynamically. It is currently controlled via a pot on the DRV board. Possibilities include

  • break pot and use DAC + voltage divider
  • use 1-2 digital pins with resistors to drain from divider and create a couple preset intermediary steps by adding resistors in parallel to GND branch of the pot.
  • ?
@laurb9 laurb9 self-assigned this Mar 6, 2016
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laurb9 commented Mar 7, 2016

Made some measurements using gigapan board, which seems to confirm this idea might make sense.
With motors on but not moving, the board draws 0.5A, but during movement this surges to 1.3A.

@laurb9 laurb9 assigned laurb9 and unassigned laurb9 Apr 3, 2016
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laurb9 commented Oct 2, 2017

DRV8880 has current control (25, 50, 75 and 100%)

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laurb9 commented Oct 2, 2017

See #41

@laurb9 laurb9 closed this as completed Oct 2, 2017
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