Retrofitting a 1986 Maho MH400E

Chris---
Mark commentated on the D.S.G. lathe ,which is impressive. but I spied the launch engine. Looks as if you haven't been sitting around playing cards all day. What is the stern to bow length of the boat that engine is to power and what size will the boiler be?
Given any thought to a Heidenhan firing control of the boiler?:laugh:

I don't feel qualified to give you-all advice . But maybe some of my thoughts

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db1981 @ others mentioned checking the fluid level of both pumps (lube an hydraulic) . The reason being is a low level can effect a lock out in the start up sequence. Also I think the hydraulic pump has a pressure switch for min/max pressure. Don't remember if lubrication pump has a pressure switch but easy to check. My thought is to make up several low amperage light bulb sets and wire them across the contacts Think it is a 24 volt DC supplied on a MH600E but you need to verify what your C 700 is. To me, fumbling with volt meter test leads on a timing out circuit and trying to see the meter action has gotten old long ago . Use low amperage bulbs such that they indicate -not emulate the switch contact action . Something like several 12 volt auto instrument panel bulbs in series having very long wire leads that can be seen while working at the control panel .
db1981 noted the checking of various power supply voltages an looking for ripple to qualify functioning of diodes an filter capacitors
If a scope is not available some idea can be obtained by measuring the A.C. voltage level in the D.C. circuit. High A.C.value = high ripple = diode and or filter capacitor problem.
You stated the back up battery has been replaced. I have found that in today's world ,new replacement stuff may not have the quality that used to be. Not very hard to check the new battery ,might also check it's charging supply.at the battery terminals with some load.
I always try to make copies of the electrical schematics . That means greasy fingers- coffee/tea spills -pencil marks -etc don't cause a train wreck ( hull breach - loss of boiler feed water) due to the documentation being trashed.
It might help db1981 and others if you could note the extent of your documentation. Like schematics of your machine - schematics of the Heidenhain control - schematics of the Siemens PLC and if any service manuals.
Hope you and Brad find a quick solution.

Bob

Thanks Bob. Unfortunately, I have to wait for Brad who is a busy manager of an Electrical & Automation Company. I can do some of the testing my self. And yes I do have copies of the Electrical Schematics. I may post them on this site. They may be useful to others.
Regarding my other machines and my long time Steam Launch Project. I don't want to change subject on this Forum. Any one interested. see waitematawoodys.com/?s=mcmullen+steam+launch&submit=Search
Thanks

Yes when I was young I heard about the Dean Smith & Grace being the Rolls Royce of Lathes. They were so expensive only the Government work shops had them. I now have two of these relics of the past.
Frustrating for me but I have to wait for Brad who is very busy.
Thanks Mark

chris mcm wrote: Yes when I was young I heard about the Dean Smith & Grace being the Rolls Royce of Lathes.

Them's fighting words amongst Holbrook owners

(I am caught in the middle, as I was brought up local to DSG, and used one of their headstocks in a cam plastometer once. But now own a Holbrook Minor (converted to CNC). But then the Holbrook folks look a bit askance at the Minor too)

I should have also have said British Lathes. I am only an amateur machinist so my opinion does not really count. Sure you are right.

Hello db 1981, Mark and Bob
We are doing the suggested checks tomorrow. I have just gone through the electrical schematics. They relate to the machine electrical number E 967 and I believe I have them all.
For db 1981. You wrote above. -check the 24V between 140/141 Page 8252, better with oszilloscop to see if all Diodes are ok.
Please what is page 8252. Is it a schematic? I don't have that number. My electrical drawings are numbered E 3 . 8260 to E 3 8280. I will post a copy of the list. I regret I can not speak German. Thanks again Cheers Chris