English (UK) 
简体中文 Have you ever encountered a situation where the doubler chain on the production line is running crooked, the material is stuck on the edge and almost falls off, and the whole line has to be shut down in an emergency? Newcomers to this kind of problem are often sweating profusely, knocking around with a spanner but making more and more of a mess -In fact, the 90%'s runaway problem lies in three key areasThe first thing I want to do is to make sure that you have a good understanding of what you are doing. Today we will break open the rubbing said clearly, after reading you can also be half a maintenance master!
First, the roller is crooked: conveyor line "joint misalignment"
Imagine that the rollers of a multiplier chain are like human joints. If the joints are misaligned, can you walk without distortion? According to the maintenance data of the production line.The deviation of the transverse centre line of the rollers from the longitudinal centre line of the conveyor is more than 3mm.Ironically, it's a runaway! How can I tell? Take a tape measure and measure the distance between the two lines. If it's more than 3mm, you have to adjust it.
Adjustment mnemonic::
- Which way the chain goes, the rollers push.(e.g. if the chain runs to the right, move the right-hand rollers forward)
- Contralateral reverse retreat(Left side rollers synchronised to move backwards)
Don't be brute force when operating! First loosen the long mounting hole bolts on both sides of the roller set, fine-tune them by half a centimetre with a pry bar, tighten them and then try the machine to observe. There is a pit here.After tuning must be no-load test run! A teacher once brought the material to adjust the rollers, the results of the chain directly "tail" to the baffle dented.
Secondly, the rack is not level: can the building be positive with a collapsed foundation?
If the headstock and tailstock "sit crooked", it's like a house with a sloping foundation. It is mentioned in the web page.Difference in height between the mounting planes of the two bearing housings＞1mmThe roller will then "slip" with the chain.
Calibration Practical Steps::
- Head Roller: Chain deviation to the right → right bearing seat forwardmaybeLeft bearing seat rearward (reverse operation for left deviation)
- Tail Roller: and headcomplete oppositeThis is the most common mistake newcomers make! That's where newbies get it wrong.
The key tool must be ready: laser level than the traditional level ten times accurate. Last year, the Dongguan electronics factory was calibrated with an ordinary ruler, three days to repair five times. Tune in time to rememberSynchronising Trimmer Bolt, a one-sided hard top can cause the bearings to seize!
Third, the material is put on the wrong side: the centre of gravity is crooked, the car will turn over.
"Isn't it just a release?" --Material off-centre on conveyor belt by more than 5cmThe chain will immediately lose its temper with you! The physics is simple: the right side of the pile is heavy, the chain is pressed to the left to escape.
The eradication programme is simpler than it seems::
- temporary emergency relief: Add a baffle (10mm thick PVC sheet) on the offset side.
- Long-term responses::
✓ Drawing for operatorscentre line(spraying a frame with yellow paint)
✓ For shaped partsCustomised pallets(Failure rate reduced by 70% after modification of an air-conditioning plant)
✓ RetrofittingInfra-red countermeasure sensors(Automatic alarm for material deviation over the limit)
Ask Yourself: 3 Most Confusing Questions for Newbies
Q: Do I need to remove the chain when adjusting the rollers?
A: Never disassemble! Loosen the bolts → fine-tuning → tighten the bolts → try the machine.It's only accurate with a chain.. A newbie at an auto parts factory removed the chain to adjust it, and put it back on to run worse - because the chain tension had changed.
Q: Is it okay to use shims to align the rack?
A.Temporarily, yes. Permanently, Ray.! Shims can lead to stress concentrations. The web page explicitly requires that the mounting plane must be reworked with an error of ≤ 0.5 mm to be durable.
Q: What is the proper height to install the baffle plate?
A.1/3 of the material height is most effective! Too low to block, too high to jam the tray. Reference to a notebook production line in Suzhou data: 20cm high host, blocking 7cm when the run rate is zero.
When I first got into the business I always thought that repairs depended on experience metaphysics, but now I see through it.It's just that the "three points and one line" aren't aligned.Next time the production line is out of order. Next time there is a problem on the production line, first take a tape measure to measure the distance between the rollers, then check the level of the rack, and finally keep an eye on the loading station - three strokes down and still can't get it right? Then we should look for manufacturers to change the chain!
