Installing and troubleshooting MAHO MH600C

[FDavies]

Hi folks,

I've just acquired a MAHO MH600C (with 2-axis rotary table) and moved it into my shop (with single phase 220V 200A service.)

I'd like to start a thread discussing the procedure for bringing a used machine of this type, back online under new ownership. The machine looks to be in great condition by it's appearance, and was used in production by another local company for many years, but may have some minor unknown issue.

It's last settings, fluid levels, and general state are all unknowns.

The manuals are intact.

I believe I need to acquire a rotary phase converter next.

I suppose the next thing to try and discover, is where the power connects to the machine. ...I "think" I know, but it is not confirmed in the wiring diagram, ...at least from what I can tell. The terminal block is labeled X1 in the electrical cabinet, and marked 35 , L1, L2, and ground ...I would have expected more simply: L1 , L2 , L3 , and ground. (The three phases plus earth.)

You can see this in the photos (lower left.)

Suggestions?

[cnc321]

On Maho's that we have retrofitted, the terminals were L!, L2, L3, N, PE; but nothing was connected to the N terminal. (it was expected that the N and PE [earth ground] were connected together at the transformer).

[AndreasL]

2-axis rotary table!!!

This one needs at least one picture!

Hmm, youre thread just reminded me about "my own" MH500C I am supposed to get installed...any day...soon...

[toolnuts]

Hi,

You would be better served by buying a PhasePerfect electronic phase converter. You can find them on Ebay.

I used a rotary converter for many years. They will get you by on-the-cheap,
but not like the real thing. If you want to make your own rotary converter there are several designs on the web. You need to be electronics smart, but if your into fixing your new CNC you should know some electronics anyway.

You don't get true 3 phase with a rotary, and their designs are usually a compromise on load balancing.

Paul

[Luslugger]

You need to review parameters. When you find the battery that may be maintaining the memory, do not disconnect it. I put the same voltage in parelel before removing the battery. Some times you can retain the memory.

[FDavies]

Hi,

You would be better served by buying a PhasePerfect electronic phase converter. You can find them on Ebay.

I used a rotary converter for many years. They will get you by on-the-cheap,
but not like the real thing. If you want to make your own rotary converter there are several designs on the web. You need to be electronics smart, but if your into fixing your new CNC you should know some electronics anyway.

You don't get true 3 phase with a rotary, and their designs are usually a compromise on load balancing.

Paul

Hi Paul,

Thank you. I do have some basic electronics skills, digital mostly, but I am not
an electrician and have a very limited practical knowledge of wiring and code.

MAHO wrote this morning that a 10KVA converter would be adequate.

Have you experienced problems using a rotary converter? (I was a bit concerned about damaging any electronics on the MAHO using a rotary converter.)

I will look into the PhasePerfect electronic phase converter.

[FDavies]

2-axis rotary table!!!

This one needs at least one picture!

Hmm, youre thread just reminded me about "my own" MH500C I am supposed to get installed...any day...soon...

One picture of the 2-axis rotary table coming up as requested!

[FDavies]

You need to review parameters. When you find the battery that may be maintaining the memory, do not disconnect it. I put the same voltage in parelel before removing the battery. Some times you can retain the memory.

Thank you.

So far I have not seen anything which looks like a battery, but I am sure you are correct and will post it's location and picture when either; I find it, or locate the place where it should go.

What type of information will be retained? I am not interested in the programs of the previous owner, but would hate to loose information relating to general setup or calibration etc.

What 'parameters' are important to note and were are they found?

Gauges currently read 'zero' and there are a number of switches which I will try to address here along with photographs to help any who follow this thread.

[FDavies]

On Maho's that we have retrofitted, the terminals were L!, L2, L3, N, PE; but nothing was connected to the N terminal. (it was expected that the N and PE [earth ground] were connected together at the transformer).

Yes, I see this labeling on the machine connected side of the terminal block.

Further inspection led me to note that the '35' labeled portion may have been due to the label itself having migrated from somewhere else in the machine, and just by chance having landed in the proper Murphy's Law Place, i.e. aligned correctly with and directly over a label area of the same size.

I see nothing in the transformer cabinet (not shown) area looking like an uncoupled or empty terminal, so I am assuming this is the correct terminal block, at which power is introduced to the machine. Nearby, there are two circular cut-outs in the floor of the electrical cabinet where I assume the electrical power cabling entered the machine.

Thank you!

[FDavies]

Looks like the diagram that came with my MAHO is for another machine.

Does anyone have a source for the electrical circuit diagram for a MAHO MH600C w/2-axis rotary table?

...MAHO said they couldn't locate one.

[machill]

Have you found a CNC Rotory Phase converter yet.
If not I have one.

Mac

[FDavies]

I'm interested.
Tell me more? (brand? rating?)
Include a photo?

I'm in Olympia WA

Thanks!