welcome to here
Our engineer is available to go there to install the machine, but the salary of engineer (USD 150)and other cost should be in your side.
For any small problems, you could show to us the video of your machines and then we would be see whats the problems it had .
For the spare part broken, we can send to your factory, but the freight should be in your side.
For the controller, we have the guarantee for one year. After 1 year, if the controller have problems, you can send to us, we will repair it but cost in your side.