The HP Latex 630 printer have a total of 5 print heads.
The new 836 Print Heads have about 50% more nozzles than the 300/500 series print heads.
The new 836 Print Heads also have a newer nozzle shape that allows for better dot placement enabling up to 4pt font.
The HP Latex 630 uses the same 836 Print Heads used on the Latex 700/800 Series. This means the HP 630 Series adds the below Gen4 Latex Print Head features to a lower equipment price point.