Finally I am having to solve some problems myself. For example, I had problems correctly positioning LQFP144 chips, they came out slightly misaligned. I consulted Neoden and they did not know how to give me a solution.
After doing my tests, I discover that when the chip is in the IC Tray at an angle different from that of the chip on the PCB, the machine does not place it correctly. The solution was simple, I put the chip in the IC Tray in the same position angle as the chip in the PCB, I edit the list of components and I put the angle to 0. So the nozzle pick the chip and does not have to turn it, this way is placed perfectly.
I can think of four causes why the big LQFP ends up misaligned:
- Lack of theta rotational resolution on the Z-axis.
- Lack of suction power or suitable nozzle for this big part.
- Lack of control over rotational movement (acceleration/deceleration too abrupt).
- Control software bugs, not unlikely for these machines.
When you attempted to find the cause, did you find evidence for any?
Tested with low speed 10 to 30, and delay pick and place 200 to 300. The problem is the same with the 4 nozzles. The nozzle I use is the CN750, the correct one for the LQFP144 chips.
I'm sure it's a software problem, Neoden already told me that with the angle at 180 I may have some problems to align correctly, but according to my own experience, even with 90 degrees already misaligns for fine pitch chips, such as LQFP100 and LQFP14.
In any case, the solution is easy, place the chip in the IC tray in the same position angle as in the PCB, and modify the angle in the list of components to 0 degrees, so the nozzle does not need to rotate the component and then place it perfectly..
The strange thing is that in Neoden, they do not know how to respond and solve the problem, I myself had to find out based on my tests. In general, the technician who attends now, although he has very good will, it is clear that he has very little experience and knows little about the product. For other consultations that I have done, I have quickly reached that conclusion, when someone does not know a matter, it is quickly evident.
Currently the Neoden Technical Service is quite deficient, with few or no solutions for most problems. In the end, I have to find the solution to almost all the problems and doubts that arise.
As I said, the machine is going pretty well, when everything is adjusted and configured correctly, but it costs for the little information and poor Technical Assistance Service.
Now I'm waiting (with a lot of delay), that they send me some customized shorter nozzles to be able to place electrolytic capacitors of 10mm of height, and some new customized trays for big inductors and other components.
In any case I still think that Neoden4 is a good machine, and with these features/price, there is no other alternative in the market. Cheaper products are toys, and products with better performance are much more expensive, and main problem is that all are big and heavy machines (Qihe TVM920, TVM925).