Introduction：
Rotary cutting machine is one of the main equipment for the production of plywood. It is divided into card-based rotary cutting machine and non-card rotary cutting machine. With the advancement of technology, digital servo control technology is also applied to the production of rotary cutting machine. The log rotary cutter re-rotates the remaining wood core, so that the raw materials are fully utilized. Shanghai Qidian has independently developed a set of systems suitable for various types of rotary cutting machines on the market. After practical application in Shandong, Hebei, Guangxi, Jiangxi and other places, it has solved many machinery manufacturers' concerns about the numerical control and automation of rotary cutting equipment. requirements.
Features：
D51 is a wall-mounted inverter, the power range is 3KW-15KW, the incoming line voltage is 380V-480V, and the control mode is vector control without speed sensor and closed-loop vector control.
Advantage：
Has excellent low frequency torque characteristics, 0.5Hz 180% rated torque;
For complex rotary cutting objects, it has enough starting torque to ensure that the motor has strong cutting force and uniform output during low-speed heavy cutting;
It has excellent speed control accuracy, the control accuracy is 0.2%, realizes precise speed control, ensures the smoothness of rotary cutting and high-speed stop and restart work, which is comparable to imported inverters;
The torque response only needs 20ms, realizing fast response, and the overall running state is more stable;
Good overload capacity and environmental adaptability, high operational reliability;
Excellent AVR function, super grid adaptability, keep the output torque constant in the case of voltage fluctuation, and can meet the normal operation of rotary cutting when the rated voltage is above 60℅;
Excellent current limiting characteristics, strong overload capacity, can effectively reduce frequency conversion overload, overcurrent protection, and maximize production continuity;
It has strong environmental adaptability, and the completely independent air duct design can greatly improve the resistance to harsh environments such as oil pollution, dust and damp heat.
System Introduction：
In this system, the rotary cutting machine is driven by the D51 frequency converter, the wiring of the control system is simple, no external controller is needed, all functions are realized by the built-in frequency converter, and the whole system is economical and reliable. Using the rotary encoder as the distance measuring sensor can improve the measurement accuracy to 0.01mm; using the rotary encoder to measure the actual speed of the roller can avoid the error caused by the unstable grid voltage on the thickness of the rotary cutting.
Technical Parameter：
On Site Usage：
According to the on-site space situation, a D51 series inverter is installed in the control cabinet, and the inverter installation and on-site motor are as shown in the figure
Running Result：
The rotary cutting machine control system using D51 inverter has been put into operation for more than three years, and has achieved good economic and social benefits:
The control device operates reliably, has good environmental adaptability, can resist harsh environments such as oil pollution, dust and damp heat, and has a low failure rate;
Excellent current limiting characteristics, strong overload capacity, can effectively reduce frequency conversion overload, overcurrent protection, and maximize production continuity;
The technological parameters of rotary cutting machinery are set online, and the cutting thickness is continuously adjustable to meet different market demands
The speed control precision is high, and the production products are more in line with the requirements.
Customer Benefits：
The thickness of the rotary cutting is uniform, the surface is smooth, and the process requirements are met;
The comprehensive protection function of the inverter can ensure production even when the power grid fluctuates, and maximize the continuity of production;
Improve production efficiency and wood utilization, protect the environment and save production costs.