Ideas, retrofitting Morbidelli Author 400

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22 Apr 2022 11:39 #240883 by sm2wmv
Hi,

I have a Morbidelli Author 400 machine which has got a NUM 1020 control today that I wish to convert. I have issues with the control PC has not failed and I have wanted to change the control system for something modern anyway for quite some time. I have been using it to mill a lot of aluminium and have done some modifications to it. I could possibly use the NUM 1020 controller but I feel it would be too much of a headache compared to just going with linuxcnc.

The mill uses Yaskawa 1xSGDB-15VD and 2xSGDB-10VD servo drives thus I am leaning towards using Mesa 7I97 for this. I think they should directly interface without problems. Thoughts?

The Control cabinet has got all I/O going to relay or an I/O board so doing the conversion should be rather easy. See picture,
 

So my idea is to make an own PCB with all connectors that exist on the current NUM 1020 controller and have this board as a interface towards the mesa boards. I will put any drivers needed for relays etc on my own board. There are 48 relays that need to be driven and there are 64 inputs. However not a lot of inputs are used, so I could probably skip having that much inputs. I think I will chose an 7I80HD-25 for this control thus just using a ribbon cable over to my own PCB.

I will be using a 22" touch screen as on the CNC plasma table shown below and also probably have mechanical buttons plus an MPG.

What are you thoughts of all this? Should I do it in another way? I chose the mesa cards a bit depending on what is available right now, so I will try to buy them as quickly as possible. I need to look into a bit how I will control the VFD but I believe that should be easy.

 
VFD and servo drives

   
Control panel

 
The mill standing as when it quit working :) 

 
Bonus picture of the Plasma CNC also running linuxcnc
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The following user(s) said Thank You: tommylight

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22 Apr 2022 23:13 #240940 by andypugh
You wouldn't use a 7i97 _and_ a 7i80. It would generally be one or the other, and then suitable daughter cards.

The 7i64 might be an option to replace the relays (48V / 2.5A drivers)

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26 Apr 2022 11:13 - 26 Apr 2022 11:18 #241281 by sm2wmv
Is there any reason if I should change and use step/dir mode of the CNC servo drive instead of +/- 10V analog drive? I can see the drive does support both but right now as the original machine is using +/- 10V.

Should this topic be in the CNC Machines category instead of Milling? Saw now it fits better there.
Last edit: 26 Apr 2022 11:18 by sm2wmv.

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26 Apr 2022 13:28 - 26 Apr 2022 13:30 #241289 by sm2wmv
Current plan is,
7i97
7i74
7i70
7i71 or 7i72, need to check if its source or sink today
Possibly 7i73 for control panel

I don't really want to replace the relay boards because the voltages those relays switch varies, some is switching mains voltages. Also for simplicity it is quite easy to just attach the cables today directly to the mesa driver board without much effort.
Last edit: 26 Apr 2022 13:30 by sm2wmv.

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26 Apr 2022 14:52 #241298 by sm2wmv
Or would it be better to use some other card combination that does work with pcconf directly making it easier to tune the axises etc? From what I understand the 7i97 is not supported directly by pcconf?

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26 Apr 2022 15:16 #241302 by andypugh

Is there any reason if I should change and use step/dir mode of the CNC servo drive instead of +/- 10V analog drive?

I can't think of a good reason to do that, I would stick with +/-10V
 

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26 Apr 2022 15:20 #241304 by andypugh

Or would it be better to use some other card combination that does work with pcconf directly making it easier to tune the axises etc? From what I understand the 7i97 is not supported directly by pcconf?

It's not so hard to get something close and edit it. 

Also: github.com/jethornton/mesact

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27 Apr 2022 07:35 #241358 by sm2wmv
Thank you!

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