ADTECH9 Series CNC Maintenance Manual
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⑷ The display panel should be installed at the position where can’t be sprayed by the coolant;
⑸ When designing electric cabinet, the external electrical interference should be reduced to as lowest as
possible to prevent interfering with the system;
To prevent interference
Anti-interference measures such as shielding space electromagnetic radiation, absorbing impact current and
filtering power clutter have been taken in design of system, which can prevent interference with the system in a
certain degree. To ensure system stability, please take the following measures to install and connect the system:
⑴ CNC must be kept away from equipment generating interference (e.g. inverter, AC contactor, electrostatic
generator, high voltage generator, and sub-unit of power lines), and the switching power supply should be
connected to a filter to improve the anti-interference of CNC (as in Fig. 1-4);
⑵ To supply power to the system through isolation transformer, the machine tool must be grounded, CNC and
driver must be connected to separate earth wire.
To suppress interference
Connect RC circuit (0.01μF, 100~200Ω, as in Fig. 1-5) to both sides of AC coil in parallel. RC circuit should be
installed close to inductive load; connect freewheeling diode reversely on both sides of DC coil in parallel (as in
Fig.1-6); connect surge absorber to the winding of AC motor in parallel (as in Fig. 1-7).
To reduce the interference between CNC signal cables and strong current cables, the wiring shall follow the
principles below:
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