Some helpful Hints for the PRINTER / PRESSMAN / and Service Personnel … should your machinery issues be more in depth for a minimal fee we can be reached for a consultation. We offer 30+ years of experience, drawings are available for specific repairs on some models. Canada 416 567 8060
FEEDER. Many times the printer experiences mis-feeding, while there can be many causes for this issue, stock, sensors, clutch, compensation, CHAINS are often overlooked … with press set to manual (no automation .. sheet advance / OFF) check if the sheet timing to front stops is erratic, we will use a clock as an example,10…11…12…1…2 sheets #1 arrives, @ 11 o’clock, sheet #2 arrives, @ 1 o’clock. never reaching the target @ 12 o’clock. This would be a strong indicator that the feeder chain is stretched, if all other components are functioning correctly (Chain no longer 360 … New Chain) more likely (365 degrees)…Stretched Chain. Warning when performing any repair, machinery should be in a lockout mode, with safety (e-stop) engaged.
IMPRESSION. Image / Impression Issues ….. Many older presses can suffer the issue of impression not engaging … or cylinder engaging too heavily, again while there are many possibilities for this issue, one commonly over looked is cylinder brakes. Cylinder brakes (usually 2 per side) are located on the outside faces of the Blanket Cylinder, designed to control the drop of the cylinder into impression, many times on older machines, brakes require a re-set, ( it is recommender to have a qualified technician perform this procedure) general setting for this procedure is to back off brake adjuster slightly, apply oil to where brakes were contacting, and adjust inward slightly to the point where oil is being wiped away by the brakes being set, Please note: these settings are sensitive and extremely slight adjustments should be made. Warning when performing any repair, machinery should be in a lockout mode, with safety (e-stop) engaged.
DELIVERY. Delivery issues are quite common on many presses, once again there are many possibilities that may be at cause, a quick and simple check by the Printer / Pressman is to lift each of the individual grippers on each bar, should the individual grippers not snap back into position, is a good indicator of lazy release and transfer timing. (Lubricate grippers and Holders). Warning when performing any repair, machinery should be in a lockout mode, with safety (e-stop) engaged.