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.