You correctly configured the print job but probably you didn’t configured when this print job will trigger. Do you want it to print when you close ticket or receive payment? You probably want it to print when you receive new orders. In SambaPOS we configure it through automation. So you’ll need to create a “Execute Print Job” action and create a new “Before ticket closing” rule to execute this action.
But you already have a print job that prints new orders. You only want to map specific products to print from a specific printer. Instead of creating a new print job for Juice Bar printer you can modify Kitchen Print job to send “Fresh Juice” items to Juice bar printer. So instead of adding “Print Orders to Juice Bar” print job edit “Print orders to Kitchen” job, add a new print mapping row and map Fresh Juice to Juice Bar printer.
You can find a sample here. See Configuring Bar Items section.