Spindle Fault - Siemens SINUMERIK 808D Service Manual

Make sure the communication settings are the same as those in the communication software on your PC.
Note
When using the SinuComPCIN, the RS232 interface must not be active for another application. This means, for example,
the RS232 interface must not be active through the following operation:
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3.6

Spindle fault

Fault description
Case 1: The spindle cannot move; the PPU screen shows the message of waiting for the spindle signal and no alarm
prompts.
Case 2: The PPU shows the spindle speed values, but the spindle cannot move and no alarm prompts.
Case 3: The spindle speed is not stable (varies during rotation).
Diagnostic steps
Case 1
1. Check the settings of machine data MD30200 (= 1: for the spindle with an encoder; = 0: for the spindle without an
encoder).
2. If you use an analog spindle, check the spindle interface X54 on the back
of the PPU for the following:
Whether the interface is loose or damaged
•
Whether there is voltage output by measuring pins 1 and 9 of X54 with
•
a multimeter after starting the spindle
3. Check whether the connection cables of the PPU, spindle drive, and encoder are in good condition.
4. Check whether the settings of the following machine data are correct:
MD30130 = 1
•
MD30240: encoder type (= 1: for the spindle with motor encoder; = 2: for the spindle with an external encoder via
•
X60)
MD30134: spindle output polarity (= 0: dual polarity; = 1/2: single polarity, as the case may be)
•
MD32250 = 100/MD32260, consistent with the rated motor speed
•
5. Check whether the spindle drive has a fault.
6. Replacement and maintenance are necessary if the fault still exists after the above inspection, because probably the
PPU is damaged.
Service Manual
01/2017
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