On Tue, Dec 7, 2021 at 10:38 PM Jan-Benedict Glaw via cctalk <cctalk@classiccmp.org> wrote:
> However, when I checked the two drives capstans, they're old. One > has a crack, and as things go, they feel partially either hard or > gooey. Are there recommendations to exchange these for new ones? I turned a replacement hub from aluminium rod and used an O-ring as the tyre. It only has to engage with the drive roller in the cartridge, it doesn't contact the tape of course. > I > also noticed that one of the two motors rotates quite freely > (both unconnected from the board, so I'm sure they're not magnetically > braked) while the other ... can be turned without any unreasonable > torque, but it won't continue to spin at all. Hmm... Try a drop of light oil on the bearings first. I'd then try running the motor off a bench supply and measuring the current it draws. If the 2 motors run properly like that and draw much the same current then there are no problems. -tony
