An example of simple repair of NXT head
From: Author:Mark Hardy Publish time:2021-09-08 14:57 Clicks:0
This head was once replaced on the device, and the calibration was successfully completed, but the placement is all points offset, and the offset is large. Re-calibration is still invalid, in order to quickly resume production, it is normal to replace another head and calibrate again .
Let's analyze it in accordance with the normal thinking below:
The same calibration Jig is used, and the two heads are calibrated, one is good and the other is bad, so there is no problem with calibrating the nozzle.
Both heads are used in the same module, one is good and the other is bad, so there is no problem with the module.
All points of this module are offset, and there are 12 shafts. It is impossible for all the shafts to have problems at the same time, so the shaft is ruled out.
This head is of the H12HS type. At least 12 different nozzles are used. It is impossible to have problems with all nozzles. Exclude the nozzles.
I.C.T is a manufacturer of SMT machines. It mainly provides customers with SMT production lines including SMT Stencil Printers, Pick and place machines, Reflow Oven, AOI Machine, Wave Soldering Machine and PCB Handling Machine etc. I.C.T has more than 25 researches on SMT and DIP technology, for the world Customers provide SMT total solutions. There are successful cases of SMT technICal team in Asia, Europe, AmerICa, AfrICa, and Australia.
I.C.T provide SMT solutions at various stages according to the different needs of customers. I.C.T is not only a provider of SMT equipment and technology, but also is the customer's escort in the field of SMT and DIP.
Welcome more people to discuss with us about SMT technologies and solutions, please contact us for more information:
Tel: +86 13670124230 (WhatsApp/Skype/WeChat)
Email: etaSMT@foxmail.com
In summary, there must be some unknown problem with this misaligned head.
After careful observation by the editor, I found a clue on one of the marks of the reference pin, and there was a white irregular attachment attached to the side of the mark. After removing it with a cotton swab, the head Put it in the box temporarily. The effect is to be verified.
On a sunny day with long grass flying, the editor was very excited, carrying an expensive "safe" in his left hand, and holding the calibration nozzle that had followed me for many years in his right hand, and walked into the very familiar one. In the SMT production workshop, there are nineteen modules standing on the left and right, like standing soldiers who welcome the leaders from afar to inspect. The red light is shining, and the alarm keeps sounding. Seeing this situation, my heart is broken... ..
To make a long story short, stop, unload the head command, pull out the module, remove the head, reinstall the head, put the calibration nozzle, push in the module, start the calibration, and verify the board. At this point, the problem has been confirmed.
From this, it is determined that the previous placement deviation occurred because the Mark point of the reference pin was contaminated. During the calibration process, the positioning center was not accurate, which eventually caused the overall deviation.
The point is here. It seems easier to solve the problem. Let's discuss how it happened. Only by understanding how it happened can we make corresponding preventive improvements.
Because the attachment is too small, it is impossible to go to the laboratory to determine the composition. At the same time, it did not produce a large number of scraps, and did not produce a long time to stop the line. Only the first level of judgment was made through the visual inspection of the microscope: white floc, visit After the production line was observed and inquired, it was speculated that the pollution source might come from:
1.Material paper braid: When the NXT cutter cuts, flying debris is generated, and then compressed air blows up and falls to the head.
2.During the maintenance process, the wiping action causes the dust-free paper scraps to fall off and stick to the head.
Probably the source of the pollution is clear, how to prevent it (if you don't agree with this paragraph, you can go directly to the end):
1. Do 5S.
2. Prescribe the inspection method after maintenance by the maintenance personnel, and replace other non-dandruff wipes.
To sum up: the size of things is determined by the way of doing things. You can try to do everything as much as possible. In the process of "enjoying" doing things, your personal experience and ability will gradually improve, and your understanding of equipment will be strengthened. With time, production The performance of the equipment will be a qualitative leap, and the capabilities of people will be improved.
Complete SMT Line , Lead-Free Hot Air Reflow Soldering, Visual SMT Pick And Place Machine, Automatic SMT Pick And Place Machine, SMT Desktop Pick And Place Machine, 2Head SMT Pick And Place Machine, 4 Heads LED Pick And Place Machine, Pick And Place Machine SMT 8 Head, PCB Board Cutting, CNC PCB Cutting, V Cut PCB, Cut PCB Machine, Cutting Stripping PCB Board, Cutting Machinery For PCB, PCB Cutting Press Machine, PCB Machine Shearing Cutting, Off Cut PCB Board, Screen Cutting Machine PCB