Maintenance and upkeep of various components of the large circular machine

Technical standards

Use a dial gauge or feeler gauge to check

(1) Self flatness of upper needle plate: standard ≤ 0.05mm

(2) Upper needle disk roundness: standard ≤ 0.05mm

(3) Lower syringe roundness: standard ≤ 0.05mm

(4) Self flatness of lower syringe: standard ≤ 0.05mm

(5) The roundness of the upper needle disk and lower needle cylinder is standard ≤ 0.05mm

(6) The roundness of the upper needle disk and lower needle cylinder is standard ≤ 0.05mm

(7) The gap between the upper disc triangle and the syringe is 0.15mm-0.20mm

(8) The gap between the lower triangle and the syringe is 0.15mm-0.20mm

2. Primary adjustment

In order to use the machine more safely and efficiently, perform the following checks and primary adjustments before using the machine

(1) Motor drive inspection

After connecting the power supply, please be sure to immediately check the driving direction of the motor. If the driving direction of the motor is different from the direction indicated on the label on the motor housing, the wiring of the motor must be changed immediately (by adjusting the two phases in the motor junction box)

(2) Inspection and adjustment of motor drive belt

Before starting up, please check the tension of the motor drive belt and apply a pressure of 1-1.8kg in the middle of the belt. At this time, the linear deformation of the belt should not exceed 3.5mm. If it is too loose or too tight, it should be adjusted immediately until it meets the requirements The adjustment method is as follows: loosen the fixing screw of the motor base, move the motor outward or inward, adjust the tension to meet the requirements, and then lock the screw

Note: After the initial three days of operation, it should be rechecked, and then checked every three months thereafter

(3) Adjustment of dust blowing system

The fan of the dust blowing system should be adjusted specifically to ensure that it is in the optimal position so that it can blow to every corner of the yarn after being powered on and rotating

(4) Adjustment of yarn transmission system

Fine tuning of A yarn feeding aluminum disc

Adjusting the diameter of the aluminum disc for yarn feeding can fine tune the transmission speed ratio and change the amount of yarn fed. The adjustment method is as follows:

Firstly, use a wrench to loosen the round nut on the top of the aluminum disc for yarn feeding. When the upper cover is rotated in the “+” direction, the 12 sliders inside the aluminum disc will expand outward, increasing the diameter of the wheel body and thus increasing the yarn feeding amount. Conversely, when rotated in the “-” direction, the sliders will retract, the wheel diameter will decrease, and the yarn feeding amount will also decrease During the rotation of the cover, it should be kept parallel to the ground, otherwise the slider may fall out of the groove. ® The adjustable diameter range of the yarn feeding aluminum disc is 70mm-200mm. After adjusting the aluminum disc, tighten the round nut again. After fine-tuning the aluminum disc for yarn feeding, adjust the tension of the yarn feeding drive belt accordingly.

Tension adjustment of B yarn transmission belt

If the transmission belt is too loose, the yarn storage device will slip and stop rotating, affecting yarn feeding. Therefore, the following adjustments should be made to the yarn feeding transmission belt before starting up:

Loosen the fixing screw of the roller and pull the roller outward along the sliding rod. At this time, the belt should be evenly stressed on the entire circle of the yarn storage device Tighten the screw.

(5) Inspection of grease lubrication

Check the lubrication condition of various parts such as the transmission system and the fabric rolling system, and replenish grease lubrication every day to avoid wear and tear caused by lack of grease lubrication of the parts.