With production challenges in running various SKU’s and no internal backup, we decided to buy from you Packsys Thailand (Now Benpac) a fresh new printing drum for our Machine Nr: 922/2010. After receive of this Printing drum , we have contacted you/PSI for helping us in installation of this new drum. PSI nominated their experience Engineers (Mr Rajakumar and Mr Nikhil Shetty]. They executed the installation under your guidance and support. After installation of this new drum, We miserably failed to run any of the SKU’s and found blanket to blanket shade variations. You mentioned that the issues is from the run-out not being achieved during installation of new printing drum. After round of emails and phone calls and based on your recommendations, we have checked all the run-out of this new print drum and other needed parameters, in-house on machine, while the drum was in assembled condition and later at vendor place in presence of Mr Rajakumar.We have duly submitted and shared this report in earlier communications for your ready references. Machine remained DOWN for almost 10 days and was idle for installation & various trials. With no result coming and lesser report , we have decided to go back to Old printing drum. The same installation crew from PSI supported us to achieve it. However to our surprise even the old drum again started to show the same blanket to blanket shade variations of light , standard and dark .Which were beyond the limits These variations were never existing except the marks and few dents on old drum. The status-quo continues While we took a chance to get the new received printing drum get inspected at second vendor’s place in Mira road, the report attached for your reference . We wish to inform that we until today, we have not done any operation on this new drum except the inspections for comparing it against your REPORT. Please refer to our specific comments. As a Next step, we would request you as OEM of this machine and components, we badly need your support on site. As recommended by you, we can arrange to complete once again the inspection and grinding operations with your engineer onsite with prior planning. Please do let us know, if grinding operation of new drum for outer diameter ~ 100 micron with shaft in workshop with tolerance range of +/- 5 micron will work ? As mentioned in our attached report, the shaft is showing already run-out of 6 micron . We have also checked old drum and surprisingly found taper of 400 micron on outer diameter. We are not clear, how such a precise components can have a taper of 400 micron ? Please check and inform from your past reports possibly. Our expectation from PSG and now you as Benpac as OEM’s is to receive quality checked parts. Please also check and inform why email from Mr. Surachai it is mentioned run-out should be in 5 micron where as in inspection report tolerance is mentioned as 10 micron? With all this homework done at our end , we would like you to quickly come up with Fool proof execution plan of grinding and assembly of this drum on site. Awaiting your positive reply