Another one MAHO (MH600C) In the LINUXCNC club

Hello,this is my first topic here and first touch with linuxcnc and mesa.
Two weeks ago my Philips CNC 432 system passed away .
After base wireing of the mesa cards the machine is almost alive....But i have some problems with  the spindle drive adjustment.
The spindle is powered by a servomotor with Indramat TRK6U driver. First trials ,before the Classicladder for the gearbox change was ready ,there
was a reaction from increase or decrease buttons on the linuxcnc comand pannel,and it was working.After the claasicladder for gearbox control was included  the things went
wrong, Gears changed just fine but the servomotor runs only with fixed and unadjustable speed .
How to bound  the output voltage with the selected gear with some voltage ratio corespinding to the curent gear ratio?
 Now about the Philips measuring lines-  i found a transmitter from analog to TTL signal  for them,and i will try how it works.
I will update topic ASAP ,when i run the Philips lines trouh Linuxcnc (i hope tomorrow) and will upload some photos.
Best regards!

Hello and welcome to the club

for the measuring lines, I just kept the original EXE card of the Philips control on my Maho.
comes out only a simple TTL signal, not differential, but that has also worked with the 432 now 30 years.

I have a .comp. for both the gearshift and the spindle speed.

which I got from "db1981" and adapted for me

The 2 components control the gearshift but also calculate the output voltage depending on the engaged gear...

the process is documented here
forum.linuxcnc.org/42-deutsch/42077-maho...plugandplay?start=70
 

Hello,

as i noted Sando has the phillips scales, he can't use exe cards....

Exe cards are only working with the heidenhain scales...

If you have found an converter for the phillips scales this would be very nice.... long ago sascha has designed an own board with FPGA and CMOS timers to got them read out. Unfortunaly most of the used chips are not available anymore.

github.com/sittner/lcnc-mdsio

 

Hello,i have some progress with the MAHO. I allready have a working (on the first look) DRO with the famous Phillips PE 2470 glass scales ,and a B-axis originaly with a Heidenhain ROD 271 incremental sensor ,wich directly outputs a TTL signal.But the spindle problems remain unsolved .And i have another big issiue -how to complie homing  switches in their original wiering with the linuxcnc? I post some pictures and .ini and .hal apologize for the wiring .
   

 


 
 
 

Hi. Can you explain your problem with the limit switches? 

As I remember from our maho, the limit switch circuit is only powered after the main e-stop circuit is latched. This means that all the limits is active (low) when the machine power is off. We used a timer in classicladder to override the limit inputs for a short time to when you press the power on button to overcome this. The main contactor pills in, latches and provide power to the limits as well via another relay. When the timer runs out, the limit switches will trip the main power when triggered as originally intended...

Not sure if your case is the same. 

Can you share more detail about the converters you used for the Phillips scales please...

ThanksHenk

Hi. The limit switches are connected in series with the e-stops so there is not a problem,and there is no need to connect with linuxcnc., It is possible other types linear scales to have integrated zero mark or something like that ,But in my case the scales and home switches are separeted. And as it is shown on the scheme in the previous post(8S2:8S5;9S2;10S2) are conected to 0V but there are a resistors 10KOm conect paralel to each switch (i think the idea here is to prevent the false triggering due to disconected cable),and i think it will be good to keep that system in that look and connect it to LinuxCNC and Mesa Cards. If it's possible of course.If it is not i will rewire whole system.

Now about the Phillips scales converters- it was quite easy in my case,without issiues .
The converters are produced by Bulgarian company ,and they are still in production, The conventors only needed 12V external power supply.
Afther some checks with dial test Indicator they seems to be accurate,i will observe them .

www.bulgarianindustry.bg/assets/cms/Imag...verter_datasheet.jpg

P.S P.S I will be grateful if someone wants to check the .hall and .ini files, and give me advice about the spindle section mess.
Greetings from Bulgaria!