How To Solve The Problem Of "Down The Knife Too Heavy" For Flat Head Keyhole Machine?

< p > there are no obvious reasons why parking is not obvious at low speed or low speed. The main reasons are: the low speed section is short, the high speed wheel and the pulley can not effectively achieve the clutch, and the following methods are recommended for inspection and adjustment. < /p >
< p > adjustment of low speed bump and stop bump < /p >
< p > we can unscrew the screws, move the low-speed bump slightly counterclockwise, and tighten the screws. The purpose of this operation is to increase the number of needles at low speed to stop, that is, to increase the running time of low speed segments. < /p >
< p > in addition, we can unscrew the screws, move the stop bumps clockwise slightly, and tighten the screws to increase the number of needles at low speed to stop. In this way, we combine the two adjustments so that < a href= "//www.sjfzxm.com" > flat head keyhole machine < /a > can get obvious low speed running section during operation. < /p >
< p > adjustment of shifting fork < /p >
< p > when the operator uses the right foot to step on the right pedal of the machine and pulls the starting lever through the chain, the starting lever of the flat head keyhole machine drives the screws on the starting frame to drive the ejector pin to swing the brake frame. When the upper part of the brake is swinging outward, the stop positioning block on the brake frame of the flat head keyhole machine is lifted out of the parking cam positioning slot at the rear end of the upper shaft. At the same time, the two belts are slid outward from the pulley to the corresponding (low speed or high speed) pulleys under the traction of the belt shifting fork, and the upper shaft drives the machine to rotate to realize the start of the machine. < /p >
< p > flat head < a href= "//www.sjfzxm.com/news/" > keyhole machine < /a > braking is about 10 seconds before the end of sewing. Through the transmission device, we can reduce the flat nose keyhole from the high speed operation to the low speed of 750 revolution per minute. At this time, the brake positioning block on the brake rack is stuck in the parking positioning slot of the brake cam, and the brake cam stops the rotation of the upper shaft by stopping the cam positioning pin and the buffer spring, thereby achieving the stop. < /p >
< p > flat head keyhole machine parking is not obvious at low speed or low speed, which is related to the position of the belt fork. High and low speed wheels can not effectively clutch, resulting in low speed, too fast. We should adjust the position of the fork of the reducer to make the high and low speed segment clear. < /p >
< p > head shift fork standard location: < /p >
< p > idling, the pulley (air wheel) of the flat nose keyhole machine exposing the transmission belt from 0.5 mm to 1 mm. At low speed, the driving belt should completely drive the driving belt pulley. Adjustment method: we can unscrew the screws in the picture and adjust the shifting fork. According to the fault condition, the belt fork should be moved forward. < /p >
< p > standard position of reducer fork: < /p >
< p > when the hand brake crank is lowered to a low speed position, we can unscrew the screws, move the belt to the low speed pulley and move the belt fork to the right position accordingly. < /p >
< p > adjustment of the shift pin of the fork drive pin < /p >
< p > by adjusting the limit screw of the fork drive pin, the flat head keyhole machine can not slip the belt from the high-speed pulley when the a href= "//www.sjfzxm.com/news/index_c.asp" belt is less than /a in the high-speed keyhole. Adjustment method: We unscrewed the lock nut first, then adjust the fork screw pin, then adjust the nut and then lock the nut. According to the trouble condition, the shift pin of the flat head keyhole machine should be screwed down. < /p >