Fokuser

[Bojan (Mount Pleasant Observatory)]

Teleskop bi uvijek trebao biti balasiran, bez obzira da li transmisija nosi" ili ne.
To je naprosto "filozfija dobrog design-a"..

[MrWorf]

Onstep ima opciju da jednu struju koristiš kod micanja fokusera, a drugu (manju) koja samo drži da se ne miče cijev fokusera pa na taj način se može smanjiti zagrijavanje i potrošnja struje.

@MrWorf - ako nema struje na motoriću, cijev fokusera može kliziti, ili?

Ne bi trebalo kliziti, vidi s rukom koliki je otpor kada motor ne radi.

Dada problem je sta je to cncv3
The stepper driver ENable control line is shared between the drivers, for this reason you can't use the auto power down options

Valjalo bi se na e4 dignit, al to je overkill samo za fokuser

Uvijek se može malo PCB zgrebati na Sleep pinu da se prekine taj spoj za baš taj motor driver, i onda taj pin spojiti na masu.

Datasheet od A4988 drivera kaže ovako za sleep pin:

"Sleep Mode ( ¯S¯¯L¯¯E¯¯E¯¯P¯ ). To minimize power consumption
when the motor is not in use, this input disables much of the
internal circuitry including the output FETs, current regulator,
and charge pump. A logic low on the S¯¯L¯¯E¯¯E¯¯P¯ pin puts the A4988
into Sleep mode. A logic high allows normal operation, as well as
start-up (at which time the A4988 drives the motor to the Home
microstep position). When emerging from Sleep mode, in order
to allow the charge pump to stabilize, provide a delay of 1 ms
before issuing a Step command."

[Strumf]

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