Check your PM
Dear Erik,
I understand your concern about finding the actual height of the desk. What comes to mind is a ultrasonic transducer based height measurement. But then you increase the BOM cost. Since the offset due to placement of the table is fixed (normally you would not shift your desk everyday), we can have some sort of offset input from the PC side software itself. For example the user can choose different offsets from a menu or input his/her own during the initial software setup. This can be read by the controller to act accordingly. Also this would reduce the amount of work in terms of circuit incorporation and trial runs. The actuators you mentioned uses optical sensors and at a resolution of 0.3175 pulse/mm there can be always an error of around 3.15mm. If this is acceptable then things can start rolling right away. USB is the right option as most PC's are doing away with the COM port. From the datasheet of the actuators I beleive that they are built with limit switches already.Check your PM you will find my regular email there. I would like to know what has already been done for the hardware part of the desk, i.e., how many actuators driving arrangement etc.
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