上海维宏电子科技股份有限公司
Weihong Electronic Technology Co., Ltd.
Specialized, Concentrated, Focused - 59 -
0.005mm/p (the corresponding max. feed rate is 48000mm/min). When pulse equivalent is
confirmed, calculate the electronic gear ratio of servo driver in terms of value of pulse equivalent.
Refer to Section 5.3 for the calculation of electronic gear ratio.
9) Examine whether the value of electronic gear matches with that of pulse equivalent. Make a mark on
any axis of the machine tool and set this marked point as the workpiece zero. Drive this marked axis
to move a fixed distance by direct command input, jog or handwheel, and so on. Measure the actual
moving distance with a vernier caliper and check whether the result is equal to the distance showed
in the software.
10) Move the machine tool manually to make sure the correctness of moving direction of each axis.
Note that NcStudio adopts ―right hand‖ coordinate system. For X-axis, right movement is the positive
direction; for Z-axis, upward movement the positive direction; while the positive direction of Y-axis is
to move away from the operator (if the movement of Y-axis is the movement of worktable, its positive
direction is the worktable moving towards the operator). If the direction is not correct, alter the axis
direction in the system parameters or the relative parameters of servo driver. If Z-axis has brake,
check the relative wiring of brake and the relative parameters of servo driver before Z-axis starts to
move for the first time. After confirmation, move Z-axis in jog mode at a slow speed, and observe the
response of Z-axis, making sure the brake can be opened normally.
11) Set the worktable stroke in the manufacturer parameters according to the actual size of the machine
tool to enable software limit function.
12) Set ―Back to Machine Zero‖ parameter in manufacturer parameters according to the installation
position of home switches of the three axes. After correct setting, perform the ―Back to Machine
Zero‖ function under menu ―Operate‖. At first, home a single axis. Home the other two axes on
condition that the moving direction of the first axis is correct; otherwise, stop homing and revise ―The
Direction of Backing to Machine Zero‖ parameter in the manufacturer parameters until all axes can
return to the machine zero.
13) Axial acceleration: it is used to describe the acceleration / deceleration ability of a single axis, in
mm/s
2
. The value is determined by the physical characteristic of the machine tool, such as quality of
movement part, torque, resistance, cutting load of feed-motor, and so on. The larger the value is, the
less time spent in the process of acceleration / deceleration will be, and the higher the efficiency will
be. Generally, for a stepping motor system, the value is between 100 and 500; for a servo motor
system, the value is between 400 and 1200. Set the value smaller at the beginning; make the
machine tool perform various typical movements for a period of time, and carefully observe it; when
there is no abnormal situation, increase the value gradually; otherwise, decrease the value and
reserve 50% ~ 100% insurance allowance.
14) Turning acceleration: it is used to describe the acceleration/deceleration ability in synchronized
motion of multi-axis, in mm/s
2
. The value limits the maximum speed of the machine tool in circular
movement. The larger this value is, the higher the maximum allowable speed on circular movement
of the machine tool will be. Generally, for a stepping motor system, the value is between 400 and
1000; for a servo motor system, the value is between 1000 and 5000; for a heavy machine tool, the
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