10 The Spindle Function
10.5 Spindle Positioning (Indexing)
A spindle positioning is only feasible after the spindle position control loop has been closed after orientation. Accordingly, this function is used for closing the loop. The loop will be opened by rotation command M3 or M4.
If the value of parameter INDEX1=1 (indicating that the main drive position control loop can be closed) and the value of parameter INDEX_C1=0, the spindle indexing will be performed by function M.
Under such conditions function M from the threshold value set on parameter M_NUMB1 to
M_NUMB1+360 will be interpreted as a spindle indexing commands, i.e., the threshold number will be subtracted from the programmed value of M, and the number obtained will be treated as an incremental displacement specified in degrees.
Thus, if M_NUMB1=100, command M160 means that the spindle must be turned by
10.6 Spindle Speed Fluctuation Detection (G25, G26)
Command
G26
enables spindle speed fluctuation detection, while command
G25
cancels it. After
The speed fluctuation detection is influenced by 4 parameters. These parameters can be overwritten from a program with addresses following command G26. The overwritten parameters are kept upon
G26 Pp Qq Rr Dd.
The below table contains the parameter interpretations:
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name | parameter | meaning | unit | value limit |
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p | 5001 TIME | time from the issue of a new spindle | 100 msec | 65535 |
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| speed command to the start of |
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| checking |
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q | 5002 SCERR | tolerance of a specified spindle speed | % |
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r | 5003 FLUCT% | allowable amount of spindle speed | % |
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| fluctuation in the percentage of |
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| programmed speed |
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d | 5004 FLUCTW | spindle speed fluctuation in absolute | revs/min | 65535 |
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| value |
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The process of speed fluctuation detection is as follows.
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