When exercising the altitude motor, there is sometimes a 'dip' before elevating the camera - why?

Short-bus / pilomar

RaspberryPi based miniature observatory

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When exercising the altitude motor, there is sometimes a 'dip' before elevating the camera - why? #26

Open Short-bus opened 11 months ago

Short-bus commented 11 months ago

While exercising the altitude motor I noticed that sometimes the camera 'dips' before raising to the assigned altitude. It appears to be a deliberate movement of the motors, but is unexpected. Needs to be investigated. This behaviour hasn't been witnessed on the azimuth motor - which should be processed identically in the software. Is this a bug or something else?

Short-bus commented 8 months ago

circuitpython/code.py has a default 'BacklashAngle' of 0.5 degrees for the Azimuth motor, which is not required in the current build. However the Altitude motor already defaults to '0.0' degrees. So backlash handling does not appear to be the cause.