marmotking
Experienced Member
So, I bought what I thought were 40 track, double sided, double density drives...only to find out that they're TM-100-4 drives...which are 80 track (i.e. 96 tpi). Now I could use them as 80 track drives and will if necessary. But, I'd like to know if there's a way to use them as 48 tpi drives. It doesn't appear there's any sort of jumper that can switch this. I don't know if it's a function of the controller board, or the stepping motor or both. Would swapping a controller board from a mechanically bad TM-100-2 to the TM-100-4 make it a 48 tpi drive? I'd assume that the -2 and the -4 must have different stepping motors. Any information would be greatly appreciated.