FD400 drive troubleshooting
Richard A. Cini
rcini at optonline.net
Thu Nov 22 06:58:17 CST 2007
That's interesting -- who?
The way that the service manual tells you to check the speed is the pulse
width on a specific test point on the PCB. I was just going to use a laser
tach on the spindle...but I have to get a tach first :-)
On 11/21/07 11:08 PM, "Grant Stockly" <grant at stockly.com> wrote:
> At 06:56 PM 11/21/2007, you wrote:
>> I thought about the speed. It's a direct-drive DC spindle motor, not belt
>> drive, in this model so I'll have to hunt around to see if there's a speed
>> control pot somewhere.
> The peak to peak voltage from the heads will tell if its a head
> problem. There are still places selling spare parts for those drives.
Collector of Classic Computers
Build Master and lead engineer, Altair32 Emulator
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