i am trying to build a little program for a conveyor chain lubricator.

The sprocket does have a sensor that pulses every 30mm and the chain is 6000mm long.

i need to lubricate the chain every 10 revolutions for a total of 2 revolutions then reset and start the process again.

i am trying to do it with counters but i just seemed to be having a program full of counters and i am sure there is a more practical way of doing this. Anyone help? or come across this before?

Thanks