Denford Software & Machines

Hello All, I have a 1983 Orac with a spindle speed problem.
When I start the spindle it reaches a constant speed and I am unable to change the speed
using the -ve and +ve buttons. The bleeper is working but no change in speed.

Hope somebody may be able to help.

johnechall wrote:Hello All, I have a 1983 Orac with a spindle speed problem.
When I start the spindle it reaches a constant speed and I am unable to change the speed
using the -ve and +ve buttons. The bleeper is working but no change in speed.

Hope somebody may be able to help.

Does the machine change speed within a program ? ? If so it is most likely the connections of the ribbon cable from the front keypad to the board.

Regards
Rob

Hello Rob,

Thank you for responding.
No it doesn't change within the program.
It did work fine until I triggered the limit switch on the x axis.

Regards
John

Have you tried the reset buttons underneath the front panel ? ?

Regards
Rob

Yes, everything seems ok. I have ran a program, but spindle speed cannot be changed.