message: added calibration_current for small motors reference
  Akex_ was unable to calibrate a small 15A peak current motor. Reducing `calibration_current` from 10A to 5A resolved the issue. I have included a reference to the use of small motors and the calibration current.
diff: @@ -171,7 +171,7 @@ For instance, to set the current limit of M0 to 10A you would type: `odrv0.axis0
  The largest effect on modulation magnitude is speed. There are other smaller factors, but in general: if the motor is still it's not unreasonable to have 50A in the motor from 5A on the power supply. When the motor is spinning close to top speed, the power supply current and the motor current will be somewhat close to each other.
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  * The velocity limit: `odrv0.axis0.controller.config.vel_limit` [counts/s]. The motor will be limited to this speed; again the default value is quite slow.
  -* You can change `odrv0.axis0.motor.config.calibration_current` [A] to the largest value you feel comfortable leaving running through the motor continously when the motor is stationary.
  +* You can change `odrv0.axis0.motor.config.calibration_current` [A] to the largest value you feel comfortable leaving running through the motor continously when the motor is stationary. If you are using a small motor (i.e. 15A current rated) you may need to reduce `calibration_current` to a value smaller than the defualt 10A.
  ### 2. Set other hardware parameters:
  