TOMATECH AUTOMATION
Speed adjustment method: select the corresponding spindle gear, determine the data
parameter
is 9999 as for this system gear, set the spindle override for 100%. Input spindle run
command in MDI
mode to run the spindle: M03/M04 S9999, view the spindle speed shown on the right
bottom of the
screen, then input the speed value displayed into the corresponding system parameter.
When entering S9999 code, the voltage should be 10V, S0 for 0V. If there is a voltage
error,
adjust bit parameter No.021 and No.036 to correct the voltage offset value (corrected by
manufacturer, usually not needed).
For the current max. speed gear, if the analog voltage output by CNC is not 10V, set it for
10V by
adjusting the data parameter No.021; when the input speed is 0, if the spindle still slowly
rotates, it
means the analog voltage output by CNC is higher than 0V, so set a smaller value for data
parameter
No.036.
If the machine is not fixed with an encoder, the spindle speed can be detected by a speed
sensing instrument, input S9999 in MDI mode to set the speed value displayed by the
instrument into
the data parameter No.037～ No.040.
4.7 Backlash Offset
The X axis backlash offset value is input by diameter, Z axis backlash offset value is input
by the
actual backlash which can be measured by a dial-indicator, a micrometer or a laser
detector. Because
the backlash offset can improve the machining precision only by accurate compensation,
it is not
recommended to measure it in MPG or Step mode, but the following method is suggested:
� Program editing (taking example of Z):
O0001；
N10 G01 W10 F800 ；
N20 W15；
Chapter 4 Machine Debugging methods and Modes
421
Ⅲ Connection
N30 W1；
N40 W-1；
N50 M30.
� Set the backlash error offset to 0 before measuring:
� Run the program by single blocks, search the measuring benchmark after 2 positioning
operations, record the current data, move 1mm in the same direction, then move 1mm to
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