Carpet machine for 80 s American production,The electrical control structure is simple, low level of automation.Workers labor intensity.after In reference to modern import frame work principle and process requirement. We have equipment the cases of technological transformation. Choose a frequency converter DNV3100 15 KW series frequency converter (preparation dynamic resistance) synchronous control two table 5.5 KW spindle motor, aided by omron photoelectric switch, applied Wallace "safety pull switch, Germany P + K proximity switch and detecting element, control the whole machine start-up, shutdown and alarm and full of yarn, doff, etc.

1, frequency converter speed control the working process of the frame need a slow and slow, stop, broken yarn, yarn with accurate parking process, frequency converter speed control of the whole process such as:

2, start-up, shutdown process

Motor in operation need before tip 2 s, use a sixty decibels before starting the buzzer in sing 2 s, in order to prompt the operator handle exit needle work area. In order to overcome in the boot startup weakness and unsmooth faults, will start frequency is set for 6 hz, increasing starting torque, but at the same time, frequency converter another function of S curve to join in the process of start, so that it has both the function of the slow start and have a more smooth start-up process, let a person feel from low speed up the process of speed change. This solved the direct start motor often burn out problems, and prevent the roving details and broken production.

3, frequency conversion inching realization

Inching frequent is carpet machine and a characteristic, carpet machine inching but in inching button will keep a certain frequency operation, this kind of low speed running is to operation, try needle, maintenance is convenient. For low speed operation, and can be in any position to stop. But converter can't work for a long time in the following 6 hz, and continuous, frequent inching can cause overcurrent protection. We are in the PLC to judgment procedure, which is in a certain time, continuous inching only in response to a single. Inching, we do not require accurate position parking, so we are in the PLC programming to join another judgment procedure, judgment is inching or normal operation. So point move, will not prompt response, proximity switch doesn't work, electromagnetic clutch continue to work. PLC because of its rich programmable instruction, and can completely realize these functions. Pass well electrical converter also has a perfect programmable external control terminal input/output, can be convenient and PLC connection. The frequency converter control terminal wiring diagram shown below