Talk:Roland CAMM3

Old spindle - main spindle is 15mm diameter, narrowing to 10mm at the end where the pulley attaches.

Bearings are 15mm ID each, and 1x 32mm OD and 2x 35mm OD. Total spindle leangth starting at the bottom of the first bearing to the top is 150mm

The actual height of the pillar outer shell is 90mm, so we might be able to fit the spindle in there. But the pulley has a 20mm thick boss on it.

Internal diameter of the frame is 40mm.

Motor test board
The connections to the motor board (J601):

1) Motor on/off. Looks like a connection to ground. 2) FV input. assumed 0-12V. 3) Ground. 4) 12V in.

FV Input feeds into an op amp. The negative side of this op amp is a variable resistor between 0 and 12V. So it looks like the op amp is designed to output a 'faster/slower' signal. That would mean if we set the input to a fixed 12V then it would probably run at top speed.

The power board is meant to supply 12V on pins 7&8 (connector J401) and ground on pins 1-3, but we removed that, so we need 12V from somewhere else.