3 Apr
2015
3 Apr
'15
9:26 a.m.
On 04/03/2015 08:17 AM, Johnny Billquist wrote:
On 2015-04-03 09:58, Robert Jarratt wrote:
If six transistors, then it is brushless (I'm sure that is
true). But, you should check the Hall sensors.
Likely one may have failed. There should be 3 sensors in
the motor, at any time they should be in a state where one
is high and two low, or two high and one low. So, turn the
spindle while checking the 3 sensor signals, all should cycle.
If the sensors are OK, then the logic going from the sensors
through to driving the power transistors is not working.
make sure the crystal oscillator is running, that regulates
the motor speed controller.
Jon
Bit of an update. I put the transistors back as
they seem
to be OK and
applied power to see if probing around would show
anything. The Z8 was
getting power, and the transistors did heat up within a
few seconds, but the
disk did not spin at all. Is this going to be a problem
with the motor
itself?
Brushes of the motor (if they have them) would be one
thing to check.
Check if the motor is getting power?