EEVblog Electronics Community Forum
Electronics => Manufacturing & Assembly => Topic started by: luizrenault on October 21, 2018, 01:44:36 am
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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
(https://www.eevblog.com/forum/manufacture/neoden-tm245p-teardown-and-upgrade/?action=dlattach;attach=552512;image)
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.
(https://www.eevblog.com/forum/manufacture/neoden-tm245p-teardown-and-upgrade/?action=dlattach;attach=552524;image)
This is the microstep driver:
(https://www.eevblog.com/forum/manufacture/neoden-tm245p-teardown-and-upgrade/?action=dlattach;attach=552494;image)
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.
(https://www.eevblog.com/forum/manufacture/neoden-tm245p-teardown-and-upgrade/?action=dlattach;attach=552518;image)
(https://www.eevblog.com/forum/manufacture/neoden-tm245p-teardown-and-upgrade/?action=dlattach;attach=552500;image)
This is the 26 pin connector pinout from the motherboard:
(https://www.eevblog.com/forum/manufacture/neoden-tm245p-teardown-and-upgrade/?action=dlattach;attach=552506;image)
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
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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?
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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.
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Hello,
I am also interrested with your mod and I am offering help.
Kindly Regards
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i only have the tm220a and the neoden 4 , i've though about redoing the tm220 since neoden no longer support it and it has firmware bugs, i just dont know if its CAN internally though, packets might be similar.
probably be easier to use a can sniffer device than a scope to listen to that bus though,
a totally wild guess its going to be something like 6-8 byte with a crc16/crc8 , or bottom of a crc16 at the end with a modified crc8 single byte reply