Mitsubishi mm30sr

[djoni]

Hello everyone, I'm looking for a service manual for Mitsubishi MM55SR, I have one but it's in poor condition, the wiring diagram is almost unreadable, it can be in Japanese, I just need wiring diagrams, I will be grateful for any help, thanks in advance. My address is [email protected]

 

[djoni]

Hello. Does anyone know what these switches are for? And what does each switch mean? Is there a description of this.

 

[djoni]

Hello. I created a device that replaces the depth gauge on an excavator. If your boom sensors or the depth gauge itself are out of order, you can put my device in place of the depth gauge and everything will work. It fits Mitsubishi MM30SR, MM40SR, MM55SR.

 

[djoni]

 

[JDC21]

I like your device. Could you give more info on it? Do you make and sell these?

 

[djoni]

I like your device. Could you give more info on it? Do you make and sell these?

Hello. My "plug" device simply emulates the operation of a depth gauge. It synchronizes with the main computer and transmits data that there are no errors and the sensors on the boom are in the middle position. The computer understands all this and begins to work in normal mode.
I make the device myself to order and sell it.

 

[djoni]

I have plans to make a sound notification in different languages about errors in the device or to transmit errors to a smartphone.

 

[Kenr]

I have copies of section Vi and Section VII of what I think is the service manual for an MM55SR if anyone is interested. They contain a lot of information about the electrical side of the machine, wiring diagrams, functional descriptions, trouble shooting and fault codes etc.

Post your email address and I'll send them through. Cheers

Hello Pete, could I get those from you?.
Email is [email protected]
Thank you

 

[naved]

⚠️ WARNING: Avoid IMD – $4000 Controller Failure, No Support, and Now I’m Building an Open-Source Replacement​

Hi all,

I want to share my experience with IMD (Industrial Motion & Drives) and why I strongly advise you do not buy their MM-R controller system, especially for excavator control retrofits like the Mitsubishi MM55SR.

---

Why I Went with IMD​

I have a background in automation and system integration. When my excavator needed a modern proportional joystick controller, I thought:

“Why reinvent the wheel? IMD already offers a product that looks like it should do the job.”

So I went ahead and ordered their MM-R system — a decision I now regret.

---

❌ What Happened​

After spending over $4000 NZD, I installed the system — and ran straight into major issues:

• Proportional joystick response is sluggish and non-linear
• Solenoids hammer and buzz violently — no matter the settings
• The system lacks the finesse and feel needed for accurate digging

I followed every instruction and even ran their joystick calibration tool — no change.

Trying to solve the issue, I went above and beyond:

• Sent them detailed voltage readings
• Shared joystick outputs in neutral and active states
• Provided photos of settings, wiring, and system behavior

Tony from IMD even admitted that some customers had experienced the same issues — but since then, they’ve stopped replying.
It’s been over two weeks with zero communication, even though they know I'm based overseas and likely can't do much about it.

---

What I’m Doing Now​

Since I’m not getting any support, I’ve decided to build my own open-source replacement using modern, accessible components.

I've already ordered the parts to build:

• A Teensy 4.1-based PWM controller
• Logic-level MOSFET drivers for the 12 V solenoids
• A touchscreen interface for settings and calibration
• Full safety and fine-tune logic: deadzones, curves, neutral switch, etc.

I’ll be releasing everything publicly: parts list, wiring diagram, source code, configuration tool — all for free.

The entire build will cost $400–$500 NZD total, and will be better-performing than IMD’s system with actual support.

---

Bottom Line​

If you're considering buying from IMD — don’t.
They may look like a professional outfit, but when things go wrong, you’re on your own — especially if you’re not local.

I made the mistake of trusting them instead of building my own solution. Now I’m fixing that, and I’ll be sharing every step of the way to make sure no one else gets caught the same way.

 

[djoni]

⚠️ ВНИМАНИЕ: избегайте IMD — сбой контроллера стоимостью 4000 долларов, отсутствие поддержки, а теперь я создаю замену с открытым исходным кодом​

Всем привет,

Я хочу поделиться своим опытом работы с IMD (Industrial Motion & Drives) и объяснить, почему я настоятельно не рекомендую вам покупать их систему контроллера MM-R , особенно для модернизации систем управления экскаваторами, таких как Mitsubishi MM55SR.

---

Почему я выбрал IMD​

У меня есть опыт в области автоматизации и системной интеграции. Когда моему экскаватору понадобился современный пропорциональный джойстик, я подумал:


Поэтому я пошла дальше и заказала их систему MM-R — решение, о котором я теперь жалею.

---

❌ Что случилось​

Потратив более 4000 новозеландских долларов , я установил систему и сразу же столкнулся с серьезными проблемами:

• Пропорциональный отклик джойстика вялый и нелинейный
• Соленоиды сильно бьют и гудят — независимо от настроек
• Системе не хватает точности и ощущений, необходимых для точного копания.

Я следовал всем инструкциям и даже запустил их инструмент калибровки джойстика — никаких изменений.

Пытаясь решить эту проблему, я пошел дальше и дальше:

• Отправил им подробные показания напряжения.
• Общие выходы джойстика в нейтральном и активном состояниях
• Предоставлены фотографии настроек, проводки и поведения системы

Тони из IMD даже признал , что некоторые клиенты столкнулись с такими же проблемами, но с тех пор они перестали отвечать.
Прошло уже больше двух недель, и со мной нет никакой связи , хотя они знают, что я нахожусь за границей и, скорее всего, ничего не могут с этим поделать.

---

Что я сейчас делаю​

Поскольку я не получаю никакой поддержки, я решил создать свою собственную замену с открытым исходным кодом, используя современные доступные компоненты.

Я уже заказал детали для сборки:

• ШИМ-контроллер на базе Teensy 4.1
• Драйверы MOSFET логического уровня для 12-вольтовых соленоидов
• Сенсорный интерфейс для настроек и калибровки
• Полная безопасность и тонкая настройка логики: мертвые зоны, повороты, нейтральный переключатель и т. д.

Общая стоимость всей сборки составит 400–500 новозеландских долларов , и она будет работать лучше, чем система IMD при фактической поддержке.

---

Итог​

Если вы подумываете о покупке у IMD — не делайте этого .
Они могут выглядеть как профессиональная организация, но когда что-то идет не так, вы предоставлены сами себе — особенно если вы не местный.

Я совершил ошибку, доверившись им вместо того, чтобы разработать собственное решение. Сейчас я это исправляю и буду делиться каждым этапом, чтобы никто больше не попался в такую же ситуацию.

Hello! Do you have a problem with the controller on your Mitsubishi MM55SR?

 

[naved]

Hello! Do you have a problem with the controller on your Mitsubishi MM55SR?

Hi Djoni,

Yes—I bought this kit and installed it from the company, but it doesn’t work correctly: no fine control, it’s erratic, not very proportional, and the valves hammer no matter the settings. I’ve sent 4–6 emails to IMD over the past six weeks asking for help; they replied once saying “it doesn’t work correctly for some people” with no direction or assistance, and now they’ve stopped replying altogether.

 

[djoni]

Hi Djoni,

Yes—I bought this kit and installed it from the company, but it doesn’t work correctly: no fine control, it’s erratic, not very proportional, and the valves hammer no matter the settings. I’ve sent 4–6 emails to IMD over the past six weeks asking for help; they replied once saying “it doesn’t work correctly for some people” with no direction or assistance, and now they’ve stopped replying altogether.

My address is [email protected]

 

[djoni]

Hi Djoni,

Yes—I bought this kit and installed it from the company, but it doesn’t work correctly: no fine control, it’s erratic, not very proportional, and the valves hammer no matter the settings. I’ve sent 4–6 emails to IMD over the past six weeks asking for help; they replied once saying “it doesn’t work correctly for some people” with no direction or assistance, and now they’ve stopped replying altogether.

What you bought the kit will not work 200%, you need to restore the original controller. Anything else that you will invent will not work) I went through this. I made my controller for an excavator, it still did not work as it should.

 

[Geoffm]

Hello Pete, could I get those from you?.
Email is [email protected]
Thank you

Have you looked at https://www.woodandtrees.co.uk/topics. Some good info there

 

[naved]

What you bought the kit will not work 200%, you need to restore the original controller. Anything else that you will invent will not work) I went through this. I made my controller for an excavator, it still did not work as it should.

Hi Djoni.
Did you buy the IMD tech IMDynamics MM-R system from Australia? i have the original controller but it had issues so i brought this kit that is suppose to work but is rubbish in my experience and they are refusing to help fix it just ghosting me. i tore out all the old wiring and fully rewired it for this controller that doesn't work correctly. so I'm unsure if i could get the existing computer to work now.

 

[djoni]

Hi Djoni.
Did you buy the IMD tech IMDynamics MM-R system from Australia? i have the original controller but it had issues so i brought this kit that is suppose to work but is rubbish in my experience and they are refusing to help fix it just ghosting me. i tore out all the old wiring and fully rewired it for this controller that doesn't work correctly. so I'm unsure if i could get the existing computer to work now.

You need to restore the old wiring.

 

[Graham Hamilton]

⚠️ WARNING: Avoid IMD – $4000 Controller Failure, No Support, and Now I’m Building an Open-Source Replacement​

Hi all,

I want to share my experience with IMD (Industrial Motion & Drives) and why I strongly advise you do not buy their MM-R controller system, especially for excavator control retrofits like the Mitsubishi MM55SR.

---

Why I Went with IMD​

I have a background in automation and system integration. When my excavator needed a modern proportional joystick controller, I thought:


So I went ahead and ordered their MM-R system — a decision I now regret.

---

❌ What Happened​

After spending over $4000 NZD, I installed the system — and ran straight into major issues:

• Proportional joystick response is sluggish and non-linear
• Solenoids hammer and buzz violently — no matter the settings
• The system lacks the finesse and feel needed for accurate digging

I followed every instruction and even ran their joystick calibration tool — no change.

Trying to solve the issue, I went above and beyond:

• Sent them detailed voltage readings
• Shared joystick outputs in neutral and active states
• Provided photos of settings, wiring, and system behavior

Tony from IMD even admitted that some customers had experienced the same issues — but since then, they’ve stopped replying.
It’s been over two weeks with zero communication, even though they know I'm based overseas and likely can't do much about it.

---

What I’m Doing Now​

Since I’m not getting any support, I’ve decided to build my own open-source replacement using modern, accessible components.

I've already ordered the parts to build:

• A Teensy 4.1-based PWM controller
• Logic-level MOSFET drivers for the 12 V solenoids
• A touchscreen interface for settings and calibration
• Full safety and fine-tune logic: deadzones, curves, neutral switch, etc.

The entire build will cost $400–$500 NZD total, and will be better-performing than IMD’s system with actual support.

---

Bottom Line​

If you're considering buying from IMD — don’t.
They may look like a professional outfit, but when things go wrong, you’re on your own — especially if you’re not local.

I made the mistake of trusting them instead of building my own solution. Now I’m fixing that, and I’ll be sharing every step of the way to make sure no one else gets caught the same way.

I don't know how your new IMD controller works but the original one has spool position sensing (LVDT) coils which feedback to the controller and aid spool position control. You can see these on the electrical wiring diagram and they are also mentioned in the troubleshoots section. Also when PWM is used to control proportional solenoids they often have a low "dither" frequency superimposed over the PWM. This has the effect of keeping the spool always on motion and cuts down on friction (stiction). This aids smooth control. There are lots of write-ups on this.

Probably worth saying as a last resort others have converted these machines to cable control.

G

 

[naved]

I don't know how your new IMD controller works but the original one has spool position sensing (LVDT) coils which feedback to the controller and aid spool position control. You can see these on the electrical wiring diagram and they are also mentioned in the troubleshoots section. Also when PWM is used to control proportional solenoids they often have a low "dither" frequency superimposed over the PWM. This has the effect of keeping the spool always on motion and cuts down on friction (stiction). This aids smooth control. There are lots of write-ups on this.

Probably worth saying as a last resort others have converted these machines to cable control.

G

i Still have the original controller. i could try to decode which pin does what and see if i could get it working off the original.

 

[djoni]

Probably worth saying as a last resort others have converted these machines to cable control.

It is a bad decision to switch to cable control, many people re-do it back to the original control. I would advise trying to restore the wiring, there is nothing complicated there, there is a diagram, although not the best quality, but you can figure it out. I could make my own controllers for these excavators, but having figured out the native controller, I came to the conclusion that the Japanese made an indestructible controller, there is so much protection that it will not burn out so easily until you get your hands in there)), it has constant diagnostics for problems. I have a video where the excavator works completely on my controller.

 

[naved]

It is a bad decision to switch to cable control, many people re-do it back to the original control. I would advise trying to restore the wiring, there is nothing complicated there, there is a diagram, although not the best quality, but you can figure it out. I could make my own controllers for these excavators, but having figured out the native controller, I came to the conclusion that the Japanese made an indestructible controller, there is so much protection that it will not burn out so easily until you get your hands in there)), it has constant diagnostics for problems. I have a video where the excavator works completely on my controller.

thanks for the video. i have the MM55SR so slightly different controller to yours i believe? anyway. i would love to get my oem controller running again. i no longer have the original wiring so will have to try and decode the pins connected to the controller and rewire it myself. i would like to remove the sensing system on the booms like you have done as it will remove some complexity. i removed the original controller because i kept getting the s.c.e. error. if you have any more information id love to know.