Padovani LE-200 Retrofit

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30 Jan 2022 14:00 #233545 by DoWerna
Replied by DoWerna on topic Padovani LE-200 Retrofit
With the matrix I would have enough gpios,
But they are completely unprotected, against ESD, EMI, or just me :-)

The 7i92 also sits in the back of the machine.
The cables to the buttons would be very long, and run parallel to the feed lines of the servos.

I think this is not a good combination.

Although I have read a bit on the subject
www.digikey.com/en/articles/protecting-i...-digital-electronics

But I think a 7i73 directly under the panel is surely the cleaner and much simpler solution than a protection circuit on a further board...

so it will probably be a 7i73

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01 Feb 2022 10:15 #233702 by DoWerna
Replied by DoWerna on topic Padovani LE-200 Retrofit
Good news :-)

Traced the original emergency stop chain and scissored it.
I think I understand the circuit and how it interacts with the controller.

Could even test the Simodrive with a 0-5V voltage source, spindle servo and X-axis servo worked :-)

I haven't tested the Z axis yet, would like to remove the drive belt first....

How can I check if the direction of the three-phase current to the machine is correct?
The servo motors work, but I just put the machine under power without checking it.

Next question,
How was such a machine homed, with the original control?

The machine has no glassrulers and I have also found no switches on the axes.
Feedback comes from rotary encoders on the spindles, which would have an index signal.
I wanted to mount switches and then reference in combination with the encoders.

Go till limit switch, then back till index signal.

but how was this done on the original machine.
or was there no homing provided?

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03 Feb 2022 20:26 #233908 by DoWerna
Replied by DoWerna on topic Padovani LE-200 Retrofit
The electronics cabinet grows

 
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06 Feb 2022 11:50 - 06 Feb 2022 11:51 #234094 by radom
Replied by radom on topic Padovani LE-200 Retrofit

Next question,How was such a machine homed, with the original control?The machine has no glassrulers and I have also found no switches on the axes.Feedback comes from rotary encoders on the spindles, which would have an index signal.I wanted to mount switches and then reference in combination with the encoders.Go till limit switch, then back till index signal.but how was this done on the original machine.or was there no homing provided?Translated with www.DeepL.com/Translator (free version)

 

I think it was homed on those marks with indexif you have those marks od your machine 
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09 Feb 2022 10:30 #234381 by DoWerna
Replied by DoWerna on topic Padovani LE-200 Retrofit
I have now pulled out the original control including all the now no longer used cables.
 

Emergency stop chain and enable circuit remains unchanged, of course.

a little sorted
 
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18 Mar 2022 10:31 #237627 by DoWerna
Replied by DoWerna on topic Padovani LE-200 Retrofit
worked a bit more on the panel

     
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02 Apr 2022 15:22 #239075 by DoWerna
Replied by DoWerna on topic Padovani LE-200 Retrofit
the panel is not 100% protected against chips from behind.
Today I printed a small case for the 7i76.

I uploaded the stl files on thingiverse.

www.thingiverse.com/thing:5338518
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13 May 2022 21:03 #242910 by DoWerna
Replied by DoWerna on topic Padovani LE-200 Retrofit
Finally had a little time again. 

The panel is wired.
All buttons are present in the halshow.
Still waiting for an uln2003a.
To control 6 leds of the keys... 
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13 May 2022 22:19 #242912 by tommylight
Replied by tommylight on topic Padovani LE-200 Retrofit
Hmmm is that panel floating or have i gone fully blind? :)

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14 May 2022 05:00 #242937 by DoWerna
Replied by DoWerna on topic Padovani LE-200 Retrofit
Its magic 
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