Neoden TM245P Pick and Place Teardown and Upgrade - Page 1
Forum section: electronics / general

author: luizrenault
author_rank: Newbie
timestamp: October 21, 2018, 01:44:36 am
content: 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 toucha power supply and control board (model TY131)two microstep drivertwo vacuum pumpsone air blowera transformerThe 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->-9VAnd the following connectors:P1 -> Transformer (label 220V)P2 -> air blower (connected to AC input)P3 -> Transformer (label 110V)P4 -> AC input and on/off switchP5 -> Transformer taps labeled 70V, 23V, 11V, 11VP6 -> To motherboardP7 -> 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 JTCKP12 -> Endstop Y axis switchP13 -> Pick and place headP14 -> Vacuum Pump AP15 -> Vacuum Pump BP16 -> Endstop / origin Y axis switchP17 -> Feeder block 1P18 -> Feeder block 2The 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

author: luizrenault
author_rank: Newbie
timestamp: October 21, 2018, 07:33:12 pm
content: 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?

author: luizrenault
author_rank: Newbie
timestamp: October 21, 2018, 08:38:41 pm
content: 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.

author: szymon019
author_rank: Contributor
timestamp: December 31, 2018, 12:08:15 pm
content: Hello,I am also interrested with your mod and I am offering help.Kindly Regards

author: charliex
author_rank: Frequent Contributor
timestamp: December 31, 2018, 09:07:23 pm
content: 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