For me it is a day of grief....................
1 Communication with customer test methods。
notes：
Test execution
1. Make sure power supply is turned off.
2. Insert XXX into jig.
3. Turn on the XXX power switch.
4. Turn on 230V AC / 400V AC power supply.
5. Run program “Program XXX.bat” on PC to program the XXXwith its software. NOTE: Programming of the XXX will probably fail with an error message if the XXX withXXX -test software is connected to the XXX at this point.2
6. The test starts automatically when the software is finished transferring to the XXX.
7. Manual test: Tests triac (that turns heat element on and off). After transferring the software to the XXX, the XXX will turn the heat element on for 0.75s.
a. The voltage on the volt meter should measure around 230V AC / 400V AC between “J5” and “J6” for 0.75s.
b. The XXX in the jig is configured to always turn the heat element off, so after about 2s (if not sooner) you should be able to verify that the measured voltage drops to 0V AC.
8. Automatic Test: Tests power supply, power switch, microcontroller, communication with a control unit (CU) and temperature sensor.
a. Manually visually read the test result from the XXX RGB LED light:
i. Green blink = test successful
ii. Red blink = test failed. If it only blinks red for 10 seconds or more after programming/powering up the XXX, try programming the XXX again (go to step 5).
b. Let it run until you have seen at least 3 green blinks after programming the XXX.
2translate the information
Go to the warehouse to borrow components，set up experimental environment，do experiments and record date。
2 gerber paining
In order to make the most of resource and cost saving，we need to change the gerber-paining。as show in the photo.
3 NPI-SMT
The equipment specifically designed for use with solder pasteSome pastes do well with tinned surfaces but solder poorly bare copper OSP。Apertures with geometrical figure are favorable for printed molding with solder paste。In surface mount assembly, the stencil is the gateway to accurate, repeatable solder paste deposition。Of greater value to the stencil designer is the area ratio, which can be related directly to eventual solder paste release。
4 SMT
I want to learning use the SMT machine like Yamaha .Motion control is one of the key technologies for SMT mounter，The article takesthe turret head type placement system as a example, fully analyses several familiarhighspeed placer's failures and summarizes some valid measures to eliminate them