Adtech ADT-DK300A Manufacturer's Manual page 152

(1) CNC must be kept away from the equipment with 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);
(2) To supply power to the system through isolation transformer, the machine tool must be grounded,
CNC and drive 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:
Gro
Cable type
up
AC power cord
A
AC coil
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BZ001M056A ADT‐DK300A/400A Engraving Machine
Wiring requirements
Bundle the cables of group A separately from group B and C, keep at
least 10cm clearance, or make electromagnetic shielding for group A