1

Loading table rollers not level

1、 rollers deformation

2、 complete rollers not level

1、 change rollers

2、 level the entire rollers with a spirit level

loading table

2

The four corners of loading table do not rise and fall in unison

The intake and exhaust of the throttle valve in the cylinder are inconsistent

Adjust the intake and exhaust of the throttle valve

3

Noise in the transmission of loading table

1、 chains getting loose

2、 Something stuck in between sprocket or chains

1、 Adjust the degree of tightness of chains

2、 clean the debris in between sprocket and chain

4

the sensor failed to block glass, glass hit furnace door

1、 light of sensor off

2、 light of sensor flash

3、 sensor light not light up after being blocked by glass

1、 check wiring or change sensor

2、 adjust sensor

3、 adjust sensor

5

the length of glass measured by sensors are different from actual glass

　sensors not firmly fixed or the bracket not fixed

　Firmly fix the sensor or its bracket

6

The full-process furnace entry and step buttons are not working

1、 botton broken

2、 wiring issues

1、 change button

2、 check wirings

7

the glass is off course

1、rollers deformation

2、entire rollers not level

3、The distance between the both side of the roller is inconsistent

1、replance roller

2、Overall leveling with a spirit level

3、 Adjust the roller spacing between the roller tracks to ensure consistency

8

　Roller vibration

　1、The chain support rail is too tight

2、The top screw of the shaft head bearing is too tight

　1、Adjust the chain support rail

2、Adjust the top screw of the bearing

9

Kevlar rope is damaged and loose

　Working hours are too long

Replace or rewind the kevlar rope　

　Quench section

10

Adjust the teeth of the flat wind grid transmission chain

1、 The sprockets are not in the same straight line

2、 The sprocket has lost teeth

3、 The chain support rail is too loose

1、 Check if there are any loose screws and adjust the entire sprocket

2、 Replace the sprocket

3、 Adjust the chain support rail

11

The air grille nozzles are away from the glass surfaceThe height does not match the scale of the pointer

　The pointer is loose.

　Adjust the pointer

12

Quench section roller not level

1、 Roller bending

2、 All roller not in same level

1、Replace roller

3、 Overall leveling with a spirit level

13

the glass is off course

1、rollers deformation

2、entire rollers not level

3、The distance between the both side of the roller is inconsistent

1、replance roller

2、Overall leveling with a spirit level

4、 Adjust the roller spacing between the roller tracks to ensure consistency

14

　Glass is off course after exit furnace

1、 The height of the guiding roller and the ceramic roller is inconsistent

2、 The roller spacing on both sides of the guide roller and the ceramic roller is inconsistent

3、 The height of the quench section roller and the connecting roller is inconsistent

4、 The roller spacing on both sides of the quench section roller track and the connecting roller track is inconsistent

1、 Adjust the height and low profile of the guiding roller conveyor and the ceramic roller conveyor to be consistent

2、 Adjust the connection roller track and the ceramic roller track, and make the roller spacing on both sides consistent

3、  Adjust the height and low profile of the air grid roller conveyor and the guiding roller conveyor to be consistent

4、 Adjust the roller spacing on both sides of the air grid roller track and the connecting roller track to be consistent

15

　The glass ran out of the quench section as it entered the quench section

1、 The photoelectric switch is inaccurate in measuring the length of the glass

2、 The setting of the quench entry distance is incorrect

3、 Encoder joint loose

4、 Magnetic field interference

1、 Adjust the photoelectric switch

2、 Reset the quench entry distance

3、  Fix the encoder connector

4、 Identify the interference and the grounding wire of the interference source

16

　The glass hit the furnace door as the quench section reciprocated

　1、Encoder damaged

2、Encoder joint loose

3、Magnetic field interference

　1、Replace encoder

2、Fix the encoder connector

3、Identify the interference and the grounding wire of the interference source

17

The glass broke in the quenching

1.The temperature of the glass when it comes out of the furnace is relatively low

2.Uneven heating

3.The air nozzle is clogged.

1. Increase the furnace temperature or extend the heating time

2.Clear the clogged air outlet

18

The glass broke in the cooling

1.Cooling air pressure too high

2.The original glass sheet has defects or is defective due to drilling, edge grinding, etc

1.Reduce the cooling air pressure;

2.The appearance quality of the glass should be carefully inspected before it enters the furnace.

19

Glass self-explosion 

1、 The glass is heated unevenly

2、 The glass is not quench evenly

3、The edges of the glass are not ground well, with cracks, chipped edges, etc

4、The original glass quality not good .

1、Check for any damage to the furnace wire, solid-state relay, thermocouple and fast fuse

2、Adjust the distance of the quench section and clear the clogged air nozzles

3、Carefully inspect the quality of the glass and prevent substandard glass from entering the furnace

4、Replace with high-quality original pieces glass

20

Uneven heating

　Check for any damage to the furnace wire, solid-state relay, thermocouple and fast fuse

　Replace it in time if there is any damage

Furnace　

21

The furnace ascent or descent no correct

　The lead screws and nut at the four corners of the furnace have fallen off

　The lead screw bevel gear and the lifting bevel gear are disengaged. The distance between the upper and lower furnace bodies is adjusted separately, and the four corners are adjusted to be consistent

22

Furnace not stop automatically after ascent or descent to the limited position

1、 There is a deviation in the fixed position of the limit switch

2、 The limit switch damaged

3、 There is a fault in the circuit between the limit switch and the control cabinet

1、 Readjust the position of the limit switch

2、 Replace the limit switch

3、 Check the wiring or replace the wires

23

The Furnace heating uncontrolled.

Automatically heating  after blower start wrok

　Blower or inverter cable’s insulation layer fallen off, causing a short circuit

Fix the areas where the insulation layer has fallen off with adhesive tape or other insulating materials to prevent short circuits

24

The Furnace heating uncontrolled.

1、 Short circuit between the heating wires

2、 The temperature control system crashed

3、 Thermocouple damaged

　1、Investigate the short-circuiting phenomenon

2、Shut down and restart or replace

3，Replace the thermocouple

25

Glass off course in furnace

1、 The heights of the roller are not on the same horizontal plane

2、 The distance between the both side of the roller is inconsistent

3、 The bearings of the roller have deviated

1、 Readjust the rollers level

2、 Readjustthe roller distance

3、 Remove the bearing, clean the shaft head, and wash the bearing. When installing, the bearing and the shaft head should not be too tight

26

Glass broken inside of furnace

1. The glass itself has defects such as cracks, stones and bubbles.

2.The edge grinding not good, with cracks, chipped edges, etc.

3.When tempering thick glass, if the furnace temperature is too high, the temperature difference between the surface and the center will be too large

4.Tempered glass is tempered for second time

1. Carefully inspect the quality of the glass before it enters the furnace to prevent substandard glass from entering

2. The furnace temperature should be appropriately reduced for thick glass.

3. Secondary tempering is strictly prohibited

27

The glass collided with the furnace door 

1、 The distance to the furnace or the effective distance is set incorrectly

2、 The entering photoelectric switch problem

3、 The encoder joint is loose

4、 The encoder reads the pulse value inaccurately

5、 Magnetic field interference

1、 Correctly input the value of the furnace entry or effective distance

2、 Correct the photoelectric switch

3、 Secure the encoder joint tightly

4、 Replace encoder

5、 Identify the source of interference and add the ground wire for it.

28

The stop point of the glass during its reciprocating process exceeds the preset position

1、 The encoder joint is loose

2、 The encoder reads the pulse value

3、Magnetic field interference

1、Secure the encoder joint tightly

2、Replace encoder

3、Identify the source of interference and add the ground wire for it.

29

The temperature of one heater is significantly higher than the adjacent ones

1、 Thermocouple damaged

2、 The solid-state relay was broken down

3、 Short circuit of adjacent heaters

1、 Replace thermocouple

2、 Replace solid-state relay

3、 Check out the short-circuit

30

The temperature of one heater is significantly lower than the adjacent ones

1、 Thermocouple damaged

2、 The furnace wire, fuse, or fuse is broken

3、 8057 no output

1、 Replace the thermocouple

2、 Replace heater, solid-state relay,fuse

3、 Check out the short-circuit

31

　The heating is frequently disconnected for no reason

1、 Workshop temperature too high

2、 Control cabinet cooling fan broken

3、 Temperature control switch broken

4、 The release value set on the temperature control meter is too low

1、 Build a control cabinet room to lower the temperature of the control cabinets

2、 Replace cooling fan

3、 Replace temperature control switch

4、 Set the temperature control meter value higher

32

The front and back ends of the glass bend upwards

1. When the glass enters the cooling section, the temperature at the top surfacr is higher than that at the bottom.

2.In the cooling section, the cooling rate of the upper surface of the glass is slower than that of the lower surface.

1. Increase the temperature at the bottom appropriately (or lower the temperature at the top).

2.Reduce (or increase) the distance between the upper (lower) air grille and the glass surface; Or reduce (increase) the blowing pressure at the lower (upper) part, which can be solved by adjusting the air grille or air door

33

The middle of the glass protrudes upwards

1.When the glass enters the cooling section, the temperature at the bottom is higher than that at the top.

2.The cooling rate above the cooling section is faster than that below.

1.Appropriately increase the upper temperature (or lower the lower temperature)

2.To increase (decrease) the distance between the upper (lower) air grille and the glass, or to reduce (increase) the blowing pressure at the upper (lower) part, the problem can be solved by adjusting the air grille or the air door.

34

Double bend (Four edges bulge or sunken)

1. During quenching, edges temperature lower than the central

1. increase the heating balance pressure

2. extend the heating time properly

3. adjust glass sheet location

4. heater temperature different policy, increase the central temperature properly.

35

Wave in glass surface

1. glass sheet overheating

2. glass sheet material quality reason

3.driving roller bend problem

1. reduce heater temperature or heating time

2. lower out of furnace speed

3. faster reciprocate speed properly

4. replace glass sheet material

5. replace the ceramic roller

36

Star-shaped spots

1. new furnace just production

2. ceramic roller surface with impurity

3. glass sheet bottom surface dirty

4. driving roller in quenching section dirty

1. disappeared by itself after normal production for a period of time

2. clean the ceramic roller and driving roller in quenching section

3. clean the glass sheet surface totally.

37

Density spots like orange peel

1. glass sheet overheating

2. ceramic roller surface temperature higher during thick glass process

1. reduce heater temperature or heating time

2. lower bottom heater temperature

38

Fog in central or performance changes

1. just happened at first loading for each production

2. ceramic roller surface temperature higher

3. ceramic roller surface dirty

4. no use SO2

1. disappeared by itself after first loading

2. reduce bottom heater temperature properly.

3.  shorten the time between each loading

4. clean the ceramic roller

5. increase the SO2 usage amount

39

Glass surface have cracks or masked crack

1. glass temperature are not enough

2. glass sheet material quality no good

1. higher heater temperature or extend the heating time

2. replace glass sheet material

40

Glass broken in heating section

1. glass sheet imperfection reason (cracks, stone, bubble etc. )

2. not fine edging, with cracks, chip etc.

3. big temperature difference between surface and central during thick glass heating

4. reheating the tempering glass

1. glass quality inspection before heating, don’t use sub-quality products

2. reduce the heating temperature properly

3. Reheating are forbid

41

Glass impact strength not enough

1. heating & quenching of top and bottom surface are dissymmetry

2.air pressure are too high, fragmentation are too small

1. adjust process parameters (temperature, heating rate, blowing distance etc. )

2. small the air pressure, ensure 50~60 fragmentation

42

Scratch on glass surface

1. several ceramic roller or driving roller in quenching section no working or out-sync

2. ceramic roller surface with impurity

3. other reasons

1. inspect, adjust keep the roller synchronized

2. clean out the ceramic roller surface

3. handle according to the situation analysis

43

Glass stop after entry heating section

1. into furnace distance value setting too big

2. Empty furnace reciprocate speed too low

3. Glass Ultra-long

1.reset the into furnace distance value

2. adjust empty furnace reciprocate speed (inverter output>10HZ )

3. glass sheet length cant over the Max processing size

44

Furnce door cant open

1. cylinder air input small

2. magnetic value ligter no working

3. mechanical breakdown

1. check the compressor

2. magnetic value burn out or line fault

3. out the cylinder air pipe, check if can open the door manual or not, check any mechanical fault between furnace door/ trolley and structure

45

Glass sheet no entry heating section after door open

Proximity switch or magnet switch lighter no working

1. far away between sensor module and proximity switch or magnet switch, the distance should be 5mm around

2, line fault

46

Draftmeter value are inaccurate or no pressure value

1. wrong setting

2. line fault

3. pressure sensor are damaged

1. reset the setting

2. rewiring follow the drawing

3. replace the pressure sensor

Wind Road　

47

Blower not start

1. inverter wrong setting

2. signal cable fault

3. PLC DA041 module no output

4, blower phase missing

1. reset the inverter setting

2. change new signal cable

3. replace new DA041 module

4, check the power supply system

48

49

IPC responding slowly, blue screen, cant turn on sometimes

IPC operation system problem

Reinstall the operation system or memory-chip loose

50

PLC One certain point are flash (no driving point)

Magnetic-field interference

1. location the interference source, prepare ground wire

2. signal cable changed to shielded line

1. Glass broken during forming

1. Low glass temperature when out of furnace

2. Bending quenching section air leak

3. Variable arc speed too fast

4. Distance between upper press roller and glass are too small

5. Broken glass or other object blocked in quenching section

1. Longer the heating time---higher glass temperature

2. check and adjust the seal of sluice valve

3. lower the variable arc speed

4. Adjust the gap distance between upper press roller and glass are same or big value than glass thickness

5. Clean the quenching section

2. The arch doesn’t match.

2.1 overall radius doesn’t match

1.The value of variable arc isn’t adjusted very well.

2.It maybe rebound  

3.The speed of changing arc is shifted casually.

1. Perfect the radius setting (check with the template), adjust the variable arc motor pulse value.

2. Please adjust radian and check the rebounding quantity.

You need check the rebounding quantity again after adjusting the speed of variable arc.

2.2. The middle and the center doesn’t match.

1.No fine-tuning.

2.The baseline of variable-arc changes.

1.fine tuning.

2. Baseline recalibration

2.3 Both sides of the arc are inconformity

1.The degree of tightness on both sides of the chain isn’t inconformity.

2.Changing the variable-arc speed casually (GX-R Model).

3.The variable-arc baseline of both sides has some error

1.Please adjust the degree of tightness on both sides of the chain and lock nut.

2.Bending section arc can’t change at random, must perfect the radius with template

3.Baseline recalibration

2.4 Diagonal has deviation and four angles aren't in the same surface.

1.The degree of tightness for four lifting chains isn’t same.

2. Glass display isn’t correct, glass incline during movement

1.adjust & perfect the degree of tightness of four lifting chains.

2.Revising the position of glass.

2.5 The edge of straight side is too large.

1. Glass temperature are lower when out of furnace.

2. The upper side roller and glass with big gap, glass enter quenching not in good position

1.Increase glass temperature (increase heating time or heater temperature)

2.adjust the gap distance properly, perfect the glass enter quenching section distance

3.increase the reciprocating speed in quenching and adjust lag time of blowing.

3.The edge of glass appears crackle or filaments.

1. Low glass temperature when out of furnace

2. Variable arc speed too fast

3.The temperature of environment is low.

4. Bad quality for milling and edging

5.glass sheet are bad quality

1. Longer the heating time (increase the heating temperature)---higher the glass temperature

2. adjust the variable arc speed properly

3. Add the insulation measures on the quenching section if necessary

4. Improve the milling & edging quality, enlarging chamfering

5.Adding guiding glass in front-end lead.

6. Change the glass sheet supplier

4.Waveness is big and the surface of optical properties isn’t good.

1. glass are overheating when out of furnace

2. distance between upper quenching roller & glass are too small or quenching pressure too high.

1. reduce the glass temperature (reduce heating time or lower heating temperature setting)

2. adjust upper quenching roller & glass gap distance, set quenching pressure properly.

5.Granularity isn’t good.

1. lower glass temperature when out of furnace

2.The lag time of blowing is too long.

3. Upper quenching roller press time too long.

4.Quenching air pressure not enough.

1. Longer the heating time (increase the heating temperature)---higher the glass temperature

2.Please reduce lag time of blowing and the press time of upper pressure roller.

3. big the quenching air pressure

6.glass off tracking

1. distance between compression roller and glass surface are inconformity

1. Adjust press roller distance