Arduino + Stepper Motor Power Cut problem

Support Motor controllers/drivers and motors
1

Hello,

I’m trying to use a stepper motor to control a curtain position. Basically the motor turns in 2 positions, to left and right.
My issue is that after a power cut the motor won’t remember where it was (let’s say the curtains was closed) and if I press the close button again, it will break them, moving into the wrong direction.
Is this only possible with EEPROM memory?

Thanks.

2

Hello.

You should be able to keep track of what position it was in by saving some variable to EEPROM like you mentioned. Another option might be to add a physical limit switch to detect what position it is in (e.g. placing something like one of our snap-action switches where it will be triggered when in one position but not the other).

Brandon

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