3. Needle size
In practice, the inner diameter of the needle should be 1/2 of the diameter of the spot. In the process of dispensing, the needle should be selected according to the size of the pad on PCB. If the pad size of 0805 and 1206 is not different, the same needle can be selected, but different needles should be selected for the pad with great difference, so as to ensure the glue. Point quality can also improve production efficiency.
4. Distance between needle and PCB board
Different dispensing machines use different needles, some needles have a certain degree of motility. The distance between needle and PCB should be calibrated at the beginning of each work, that is, Z axis height calibration.
5. Glue temperature
Generally, epoxy resin glue should be stored in the refrigerator at 0 - 50 C. When used, it should be taken out 1/2 hours in advance to make the glue fully in line with the working temperature. The use temperature of glue should be 230 - 250 C. The ambient temperature has a great influence on the viscosity of glue. If the temperature is too low, the glue point will become smaller and the wire drawing phenomenon will occur. The difference of ambient temperature is 50 C, which will result in 50% change of dispensing amount. Therefore, the environmental temperature should be controlled. At the same time, the temperature of the environment should also be guaranteed. The adhesive point with small humidity is easy to dry, which affects the bonding force.
Our Company is UL,ISO9001,ROHS and GJB9001B certified.
Packing and Shipping:
1. How to Get a quotation?
For PCBs,pls send us the Gerber File.For PCBA,pls send us the Gerber file and BOM(Bill of Materials)
2. What is the MOQ?
No MOQ.1 pcs is ok.
3.What is the lead time?
For PCB orders,the lead time is 2 to 10 days.For PCBA orders,the lead time will be 15 to 30 days.
4.Will the boards be tested before shippment?
Yes,all PCBs will be tested by Flying Probe or E-test.For PCBA,we will have AOI,X-ray,and functional test