114 lines
4.3 KiB
Markdown
114 lines
4.3 KiB
Markdown
Note: This is copied from a 2018 EEVBlog post by Luiz Renault for posterity.
|
|
https://www.eevblog.com/forum/manufacture/neoden-tm245p-teardown-and-upgrade/
|
|
|
|
# post
|
|
|
|
Hi.
|
|
|
|
Tired of the painful process to setup the Neoden TM245P Pick and Place, I decided to make a mod to OpenPNP to export a CSV file compatible with the Neoden machine.
|
|
|
|
This way I can reuse component database and check if required components are present or need to be installed on free feeders.
|
|
|
|
But that isn't enough. I really want to install a vision system and make it compatible with OpenPNP to control the machine.
|
|
|
|
Today I opened the bottom plate and collected some information to check if the upgrade is possible using the original electronics.
|
|
|
|
Here I share my findings...
|
|
|
|
The guts of the TM245P consists of:
|
|
|
|
a motherboard (model TY164) with TFT LCD and resistive touch
|
|
a power supply and control board (model TY131)
|
|
two microstep driver
|
|
two vacuum pumps
|
|
one air blower
|
|
a transformer
|
|
|
|
|
|
|
|
The motherboard have a STM32F407ZGT6 and a RA8875L3N TFT LCD Controller. The SD card slot can be seen on the left side of the board.
|
|
At the center there is a 26 pin IDC connector that goes to the power supply and control board.
|
|
On the top a 3 pin SWD connector and on the right side a 2 pin connector that powers the vibration feeder can be seen.
|
|
|
|
The board uses as power supply 24V that comes from the power supply and control board. There is a 5V step down regulator (LM2576S-5.0) that supplies the uC through a 3.3V Linear reg.
|
|
The 5V rail are sent back to the power supply and control board.
|
|
|
|
|
|
|
|
This is the microstep driver:
|
|
|
|
|
|
|
|
|
|
The power supply and control board have 4 diode bridge rectifiers (GBU808 on bottom layer) with +100V, +30V, +12V and -12V labels.
|
|
|
|
There are four step down regulators (LM2576T-ADJ): +30V->+24V, +30V->+24V, +12V->+9V e -12V->-9V
|
|
|
|
And the following connectors:
|
|
|
|
P1 -> Transformer (label 220V)
|
|
P2 -> air blower (connected to AC input)
|
|
P3 -> Transformer (label 110V)
|
|
P4 -> AC input and on/off switch
|
|
P5 -> Transformer taps labeled 70V, 23V, 11V, 11V
|
|
P6 -> To motherboard
|
|
P7 -> Power Supply to step controller X axis (connected to 100V labeled line)
|
|
P8 -> Power Supply to step controller Y axis (connected to 100V labeled line)
|
|
P9 -> X axis step controller signals (EN, DIR, STEP)
|
|
P10 -> Y axis step controller signals (EN, DIR, STEP)
|
|
P11 -> To DB9 connector at the back of the equipment (CAN-H CAN-L JTMS e JTCK
|
|
P12 -> Endstop Y axis switch
|
|
P13 -> Pick and place head
|
|
P14 -> Vacuum Pump A
|
|
P15 -> Vacuum Pump B
|
|
P16 -> Endstop / origin Y axis switch
|
|
P17 -> Feeder block 1
|
|
P18 -> Feeder block 2
|
|
|
|
The feeders and the head are controlled through a CAN bus connection. The same bus goes to the back DB9 connector.
|
|
|
|
|
|
|
|
|
|
|
|
This is the 26 pin connector pinout from the motherboard:
|
|
|
|
|
|
|
|
|
|
I tried to read the firmware but the uC have Level 1 Read Protection.
|
|
|
|
The next step is to log the CAN communication while sending simple commands using the equipment GUI.
|
|
|
|
Then I will check if the X and Y axis can be controlled through CAN messages.
|
|
|
|
Does anybody have the CAN message specification?
|
|
|
|
Anybody tried to mod this machine?
|
|
|
|
Best Regards,
|
|
|
|
Luiz Renault
|
|
|
|
|
|
-------------------------------------------
|
|
|
|
|
|
Hi today I placed a scope on the CAN_H and CAN_L signals on the DB9 back connector.
|
|
|
|
But they are too noisy to be useful and I had open the Pick and Place head and monitor on the inner (uC) side of the CAN transceiver (SN65HVD230).
|
|
|
|
I assumed a bit rate 512 kbit/s because the smallest pulse length.
|
|
|
|
But the oscilloscope wasn't able to decode it. The problem is that the CAN bit stuffing is not present.
|
|
|
|
Does anyone have any clue?
|
|
|
|
-------------------------------------------
|
|
|
|
|
|
Although it uses a CAN transceiver, I could see on the Placement Head board that the CAN_TX and CAN_RX signals were connected to the USART signals of the STM32F103C8 (PA9 and PA10).
|
|
|
|
Then I was able to decode de USART 512kbit/s signal. It uses a binary format.
|
|
|
|
|