There are 4 reasons for the problem:

1. No consumables in the nozzle before printing

A: Most extruders will hover at high temperatures and the melted consumables in the nozzle flow out on their own, this often results in the nozzle running dry of consumables and creating an empty cavity. This leads to a situation where the extruder needs to wait a few seconds before discharging the material when extruding; a situation where the print just starts without discharging the material. The core of the solution to this problem is to ensure that there is sufficient melted consumables in the nozzle before starting to print. The most common solution is to add a skirt, add a few circles of the skirt will be before the official start of the print object, in the periphery of the object to draw a few circles, so that the nozzle has enough melted consumables.

2. The nozzle is too close to the platform at the start of the print run.

A: There is not enough room for the melted consumables to flow out. In this case, the consumables usually do not flow out until the 3rd or 4th layer of the print. Try leveling, adjusting the height of the first layer of the slicing software, or adding a Z-axis offset.

3. The consumable has been bitten off by the extrusion wheel and has lost its grip.

A: Consumables rejection. Reduce the damaged consumables and reload the consumables.

4. Printhead clogging

A: If none of the above solutions have solved your problem, then it is likely because the printhead is clogged with magazines. Unclogging the nozzle will most likely require disassembling the extruder. You need to consult with the manufacturer before disassembling to prevent loss of warranty. Tools for unclogging the nozzle: choose the right tool for the diameter of the nozzle, drill, acupuncture needle, guitar E-string.

There are 4 reasons for the problem:

1. The first layer is printed too fast

A: When printing the first layer, it is important to set a slower speed in order to allow enough time for the consumables to be able to bond to the platform. Generally when slicing, the first layer speed is set to 50% or lower.

2. Temperature or heat dissipation setting problems

A: Some plastics (e.g. ABS), which shrink more severely, will shrink differently due to local temperature imbalance when printing large objects, causing them to buckle and detach from the platform. If you print this kind of high temperature consumables, you need a heat bed, adjust the heat bed temperature to the right temperature (ABS, heat bed 100-120 degrees, PLA heat bed temperature 60-70 degrees), in addition, if your printer has a fan for blowing consumables, you can try to turn off this fan when you print the first layer.

3. Platform surface material

A: Different printing platform materials have different bonding effects; for this reason, try to use a variety of sticky substances to improve the adhesion of the platform surface, such as glue sticks, glue, dry glue, hairspray and so on.

4.Other situations

A: sometimes printing small objects, small objects do not have enough surface area to make it can be well attached to the print bed, the easiest way is to open the brim when slicing, or add draft to increase its contact area with the print bed.

There are 2 reasons for the problem:

1. Wrong wire diameter

A: this happens, the first thing to check is whether the wire diameter is correct, usually we use 1.75mm supplies, but some manufacturers of wire diameter is not up to standard, wire diameter to be less than 1.75mm, encountered this situation, we recommend that you are still using calipers to measure a certain distance from the supplies, calculating the average value of the wire diameter of the supplies. Fill in the corresponding position to the slicing software.

2. Increase the extrusion multiplier

A: If your wire diameter is set correctly, but there is still the problem of low extrusion, then you need to adjust the extrusion multiplier (also known as flow) , for example, if before your extrusion multiplier is 1.0, you will be changed to 1.05, that means more than the previous extrusion of five percent of the plastic, the typical setting of the PLA for 0.9, ABS is close to 1.0, you can be based on the actual situation, every increase of 0.05, re-run the test print. Until you get the correct value.

There are 2 reasons for the problem:

1. Insufficient thickness of the top layer (number of layers)

A: Increase the thickness of the top layer (or number of layers) in the slicing software.

2. Low fill ratio

A: Increase the filling ratio in the slicing software.

3. Low extrusion volume

A: Increase the extrusion volume in the slicing software.

There are 4 reasons for the problem:

1. Insufficient pumping distance

A: The most important setting in retraction is the retraction distance, which determines how much plastic is drawn back from the nozzle during retraction. Normally, the more plastic that is drawn back from the nozzle, the less noticeable the drawing condition will be. Most proximity extrusion systems only require a drawback distance of 0.5-2.0mm, but some bowden extruders require a drawback distance of 15mm due to the distance of the extrusion wheel from the nozzle. If your printer has the phenomenon of pulling, try to increase every 1mm to test the pullback distance.

2. Pumpback speed is too slow

A: Another important setting in pumping is the pumping speed, which determines how fast the consumables are pumped away. If the drawback speed is too slow, the melted consumables will still flow out of the nozzle. If the drawback speed is too fast, there is a risk that the unmelted part of the consumable will separate from the melted part, or that the extruder wheel may bite off a piece of consumable. There is usually an excellent retraction speed between 20-100mm/s, which requires several attempts.

3. Printing temperature is too high

A: After checking the above two items, the next most common cause is high temperature of the extrusion head. If the temperature is too high, the consumables inside the nozzle will become very sticky and flow out of the nozzle easily, but if the temperature is too low the consumables are harder to extrude. If you are sure that the pumping distance and the pumping speed are appropriate, and you are still experiencing pulling, you can try to lower the temperature of the extrusion head by 5-10 degrees Celsius. This will give a noticeable improvement.

4. Excessive distance between traverses

A: The distance between the traversing will also have a great influence on the drawing, short distance movement, the melted plastic does not have enough time to flow out of the nozzle, but the long distance movement is very easy to produce the drawing phenomenon, some slicing software has relevant settings to avoid long distance movement, we can turn on those options.

There are 4 reasons for the problem:

1. The print head is moving too fast

A: The print speed or air travel speed exceeds the speed that the stepper motor can handle, the problem of misalignment will occur. The solution to this problem is also very simple, lower air walking speed. If necessary, you need to adjust the acceleration down as well.

2. Loose machine belt

A: The belt drive mechanism will generally have to adjust the degree of belt tension of the agency, the belt will be adjusted tighter can be solved. But pay attention to one point, if the adjustment is too tight, it will form a huge resistance between the rotor shaft and bearings or may not be able to rotate. So the degree of loosening and tightening needs to be moderate.

3. Loose body screw (top wire)

A: This small screw is used to fix the pulley on the stepper motor shaft, so that the pulley rotates with the motor shaft, but if this screw is loose, the shaft will rotate and the wheel will not. This situation can also cause the problem of layer offset.

4. Insufficient motor power supply current or motor driver chip overheating

A: It is possible that the stepper motor supply current is insufficient, resulting in the stepper motor not having enough power to overcome the resistance. It is also possible that the stepper motor driver chip is overheating, causing the stepper motor to stop rotating before the chip cools down.

A：1、Exhaustion of consumables

2、Wire bite problem occurs

3、Plugging

4、Extruder stepper motor drive overheating

During the print extrusion process, the stepper motor of the extruder keeps working. This may cause the driver chip to overheat, resulting in the stepper motor to stop working. To solve this problem, you need to add a more effective heat dissipation system on the driver chip.