tingo
Senior Member

Perhaps this might be useful to others: the drive I did this on is a Micropolis 1325.

Originally Posted by tingo

From a discussion on the cc-tech mailing list, I got a description on how to fix the "sticky bumper" problem on a Micropolis ST-506 drive. These drives have rubber "bumpers" as end-stops for the drive head. And after many years this rubber becomes sticky, resulting in the head not having enough power to "unstick" itself from the bumper when powered up.

The solution

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I connected a terminal (ND 320 aka Tandberg TDV 2200) to the console port using a current loop cable (yes, ND minimachines used 20mA current loop as their terminal link. They could use V.24 also, but this was less common). I turned on the terminal, then the machine. The machine powered up, and the power and OPCOM lamps lit up. I also got a # (the OPCOM prompt) character on the console. However, nothing more happened. Pressing OPERATE + LOAD on the front panel. didn't make anything happen either.

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What, there is a blog here now? You people. Nice present.