Introduction to common faults and troubleshooting methods of rotary cutting machine
1. The board is uneven.
Reason: Incorrect blade position, blade not sharp, blade seam too small or too large. The wood is too dry or hard, the carbon brush of the electromagnetic clutch is loose, and the gap between the pressure bars on both sides of the cutting table is not adjusted properly.
Exclusion method: Grind the tool again to a sharp edge and use an oilstone to polish it. When the cutting position is too high and the cutting gap is too large, the wood will bounce when there is very little remaining in the rotary cutting, and the surface of the board will appear in the shape of a curtain, and the wood core will be square or hexagonal. When the cutting position is too low or the cutting gap is too small, the compression force on the wood is several times higher than that of normal rotary cutting, and the shrinkage deformation of the spun sheet exceeds the tolerance, causing uneven surface of the board.
Sometimes there may be a situation where the machine automatically enters and stops during rotary cutting. Generally, it is only necessary to rotate the carbon brush downwards for one or two turns. If there is a lack of oil in the oil box, clean and diluted engine oil should be injected to prevent the clutch plate from sintering or the clutch from slipping. The manufacturer claims that if there is any shaking of the cutting table during rotary cutting of wood, it can also cause poor uniformity of the board surface. The adjustment method is to check and tighten the screws of each fastening component, adjust the distance between the two side pressure strips and the sliding block of the cutting table to 0.2-0.5mm, and remember not to adjust it too tightly.
2. The board is uneven.
Reason: Poor straightness of the blade, excessive runout of the roller, excessive pressure, severe wood on both sides, and wood that is too thin and bent.
Exclusion method: Grind the tool again and check the flatness of the blade. If the roller bounces, check whether the bearing is damaged or the radial clearance is too large. Check whether the roller shaft head is deformed due to wood bending or excessive pressure from flat circles, which affects the flatness of the sheet metal. If it bounces, replace it with a new flower roller or correct it yourself in a timely manner. If the height of the knife is too low or the gap is too small, the pressure of the single and double rollers and the knife on the wood can also cause irregular deformation of the wood, directly affecting the flatness of the veneer.
When the wood is too thin and bent, it will be forcibly straightened and rotated during the rotary cutting process due to the strong automatic feed pressure of the machine. When the wood is rotated out of the machine, it will shrink along with the original bending and cause uneven bending. During the growth process or long-term storage of wood, there will always be a characteristic of one side facing sunny and the other facing shady. Manufacturers claim that this is because the density and dryness of both sides of the wood are different, resulting in differences in the flatness of the surface of the rotary cut board. Therefore, selecting wood is also a key factor.
3. The periodic unevenness of the sheet metal.
Reason: The wooden board is too heavy on both sides, the knife is too low or too high, and the clearance between the single and double roller bearings is too large.
Exclusion method: Adjust the height of the tool position correctly and replace the single and double roller bearings.
4. The remaining wooden shaft has uneven thickness at both ends, and the board surface is fan-shaped.
Reason: The height of the two ends of the knife is not consistent, the gap between the two ends of the knife is not consistent, the single roller bearing is damaged, the screws are loose and fall off, the slide pillow and bottom bar of the knife platform are loose, and the slide screw is loose, and the screw feed is not consistent.
Exclusion method: The manufacturer pointed out that the inconsistent height of the two ends of the knife can cause the thickness of the sheet metal to be thicker on one side and thinner on the other, resulting in slanted skin and wooden core being larger on one end and smaller on the other. The wooden shaft on the side with a higher blade is thinner, while the wooden shaft on the side with a lower blade is thicker.
