I believe there may be a hardware problem with my 7766 controller. I have used this controller for a few years. It has performed flawlessly, but I now need it to drive a spindle as well.
Axis-5 has been configured as spindle per the 7766 setup manual. I am able to verify the configuration by measuring the analog output with DVM, and observing the Hicon Status Panel.
The analog output responds to M3 command, 0-10VDC as expected when speed variable is applied. Likewise, the Hicon Status panel confirm the pulse counts on the axis increase in the positive direction, and the pulses quicken and slows as the speed variable is applied.
So as I apply the M4 command to rotate the spindle counterclockwise, there is no Analog Output present. But as I observe from the Hicon Status panel, pulse counts are identical to that from the M3 command, except in the minus direction.
Upon starting the computer and controller this morning, the Analog Output under the M4 command began working. I cycled the Analog Output several times each between M3 and M4. After a while the Analog Output failed with the M4 command applied. Sometimes you can see the output drive to about 2VDC, then it will drop back to 0VDC. But the analog signal always performs from the M3 command.
Have you seen this before?
Have I overlooked something in the setup?
And if there is a hardware problem, is the board serviceable?
Thanks in advance,
BillT