nanoDLP

Hello! I am using direct control board with some extensions. I want to use vat tilting after layer curing, but before platform lifting. I use DC actuator motor with L298 driver and shell script to write the needed gpio.
vat_up.sh
pigs p 6 0
pigs p 5 255
sleep 2

vat_down.sh
pigs p 5 0
pigs p 0 80
sleep 5
I am calling this scripts in print profile before and after each layer, it is ok, but vat is tilting after the platform is lifted, and there is no sense in this. Please help. is there any possibility to do vat tilting with direct control? Thanks