Retrofitting a 1986 Maho MH400E

Only had a few minutes today.

So much for being sure I had checked all permutations of the three EXE channels. I just pulled the Z sensing head from the scale and found it's bulb not illuminating. Just to be sure, I switched it from the Z EXE to the known good X EXE, and sure enough, the bulb went on. At least I now have a next troubleshooting step, checking the 5V supply to the bulb, on the Z EXE.
Mark

Servus Mark,

im happy like a little child, just because i have purchased a old piece of steel and electronics, thats not working... for other peuple its difficult to understand... :woohoo:

yes it is also equiped with Indramat drives, it has one 3TRM2 for the XYZ, one different for the spindle drive, and i think the little one is for a eventual B-Axis.
The machine arrived today, in the next days ill try to find out whats wrong.

Bernd

Well done! What type is it? You are right, the 1TRM2 is for a rotary axis, did you get that with the machine? If you need documentation on the TRK6 for the spindle drive send me a PM, I recently scanned it.
Christian

Hi Christian,
its a MH500C, with Philipps 432 (i think version 9). no, the machine is equipped only with a standard rigid table. maybe the past owner had one... Fortunately i've got all the original documentation for the machine, But thanks anyway for the very kind offer. If somebody needs any copy's from other documentations for the 500c series i can scan them.

in the meantime i checked the fuses like Mark advised me, they seem to be Ok.
If i start the machine with the hydraulic switch the Servos sounds like they get current, and the brake on the Z-axis releases.
as discussed on other forums the failed hardware-check "axis 1 2 3 LMS failed" seems to be a problem on the control side, i think LMS stands for something like Längenmesssystem or length-measurement system.

Hello Bernd,

Cool machine. If you take the cover off the RH side (fwd looking aft) you should expose the Y Axis (normal naming - MAHO calls it Z) linear encoder. It will be interesting whether you machine has Heidenhain, or Phillips encoders. That info might also be in your manuals.

Mark

Hi Mark,

today I disassemble all the covers and sheet metal work, to clean everything and opened also the covers on the scales.
Im the less fortunate one, and got a machine with Philips 4820 heads.
As mentioned in the "Retrofit MAHO MH700c with Philips 432 control" on this forum, its very difficult to convert the signals like you did with the reused EXE from Heidenhain.
And the prices for spare pars for the Philips scales are catastrophic.

The next problem is, two Drive cards, the LM/RM and the RM/RM are broken, and I can't check the Scales without them (at least I'm not capable to do it), so i think I'm going to install new Scales with EIA422 output.

What I don't know is, if the Philips scales also have a Index for homing, ore if this Version of machines uses the first switch on the end of travel to do this, so I could also use them for homing.

Mark, as you are already very advanced with your retrofit, would you like to send me a copy of your schematics?
It would be a real big help, if I could use more or less the same I/O' numbers like you did, so if I'm in trouble (and for sure I will get to this point), I maybe can disturb you and ask you some questions.

I ordered a Mesa 6i25, 7i77 and a 7i84 for I/O expansions, so our circuits could look very similar.

Bernd