A MK9N/MAX-S cigarette making and tipping machine combination,which produced 84 mm filter cigarettes,was modificated accordingly,involving the tobacco rod length change in MK9N cigarette making machine,the filter rod,tipping paper unit,rolling block,related drums and suctional mandrels,and cigarette output roller in MAX-S filter tip assembling machine.

Oil leak was a problem of transfer arm in spider mechanism in PROTOS cigarette making machine,the leaked oil would enter the negative pressure passage and pollute cigarette.

For linking B1 cigarette packing line and ZJ17 cigarette making and tipping machine combination,taking YF12 cigarette conveying system as a reference,a cigarette handling system was developed on the basis of NF tray unloader.

The cut tobacco supplying system was improved with fluidized bed in ZJ17 cigarette making and tipping machine combination.

Aiming at the problems of complex structure and frequent faults existing in new ZJ19 cigarette making and tipping machine combination, the host computer software was designed to carry out machine status monitoring, fault diagnosis and recording, control parameter setting, system functional configuration, etc.

SPC3 was used in the electric control system of ZJ19E cigarette making and tipping machine combination, its software design including the initialization programing of AT89C52 microcontroller and SPC3, the program was stored directly in the inner flash memory of AT8.