About the print head protection under the power off status of UV printer
Settle the print heads on the ink cushion if there is an ink cushion to keep sealed.the tube can not flow air,namely,no air goes into the nozzles,light either.
Prepare nonwoven fabrics and wet them with cleaning solution or ethyl alcohol for no ink cushion.then settle the print heads down to the cloth to keep wet. examine the heads every another day in case dry.
Soaking the print heads is forbidden,soaking too long can break the heads.this a lesson.
The several main points to protect print heads:ink,temperature, humidity,wind,light, correct ink pumping,correct sealing print heads.