Author Topic: Schaublin 125-CNC retrofit to LinuxCNC and Mesa cards.  (Read 1529 times)

Offline RotarySMP

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Schaublin 125-CNC retrofit to LinuxCNC and Mesa cards.
« on: February 28, 2021, 08:17:25 AM »
I couldn't resist when this came up for auction..



There is not much online about such old CNC electronics, so I decided to a video as a tribute to the electronics and computor engineers of the 1970's. While it would be cool to get it going as is, without any manuals or knowledge of the schaublin interface with the Data General Nova, that is not feasible. I will remove the controller as a complete module and send it to a museum or collector. It wont get scrapped.


Best regards, Meilleures salutations, Mit freundlichen Grüßen, Cu salutari
Mark
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Offline Muzzerboy

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Re: Schaublin 125-CNC retrofit to LinuxCNC and Mesa cards.
« Reply #1 on: February 28, 2021, 12:01:20 PM »
Fascinating stuff! Yours was machine #12 in 1981 judging by the label. The date codes on those ICs slightly predate that, which makes sense.

Jealous as hell, will be watching!


Offline RotarySMP

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Re: Schaublin 125-CNC retrofit to LinuxCNC and Mesa cards.
« Reply #2 on: February 28, 2021, 02:53:32 PM »
Oh yeah, thanks for pointing that out.  knew there was a reason why I suspected it ws from 81, but lost track of why I thought that.
Mark
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Mark
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Offline RotarySMP

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Re: Schaublin 125-CNC retrofit to LinuxCNC and Mesa cards.
« Reply #3 on: March 07, 2021, 06:01:34 AM »
Well, no turning bck now...


Mark
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Mark
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Offline RotarySMP

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Re: Schaublin 125-CNC retrofit to LinuxCNC and Mesa cards.
« Reply #4 on: March 14, 2021, 07:00:57 AM »
Whatever cutting oil was used in this machine dried up like varnish. I am having to tear it down further than planned to clean this out, as the slides are stuck down.



Mark
Best regards, Meilleures salutations, Mit freundlichen Grüßen, Cu salutari
Mark
https://www.youtube.com/c/RotarySMP

Offline philf

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Re: Schaublin 125-CNC retrofit to LinuxCNC and Mesa cards.
« Reply #5 on: March 14, 2021, 05:39:01 PM »
Did you find out how the belts were tensioned?

Loving the videos.
Phil Fern
Location: Marple, Cheshire

Offline RotarySMP

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Re: Schaublin 125-CNC retrofit to LinuxCNC and Mesa cards.
« Reply #6 on: March 15, 2021, 07:59:51 AM »
There is nothing, so the belt tension is what it is. I also find that weird. There are no taper pins, so a tiny bit of slop in the screw holes can be used.
Mark
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Mark
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Offline RotarySMP

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Re: Schaublin 125-CNC retrofit to LinuxCNC and Mesa cards.
« Reply #7 on: March 21, 2021, 09:00:48 AM »
I pulled the Saddle off this week...

Mark
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Mark
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Offline RotarySMP

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Re: Schaublin 125-CNC retrofit to LinuxCNC and Mesa cards.
« Reply #8 on: March 28, 2021, 07:28:21 AM »
Made a little more progress, but also a bit of a set back:



Best regards, Meilleures salutations, Mit freundlichen Grüßen, Cu salutari
Mark
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Offline RotarySMP

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Re: Schaublin 125-CNC retrofit to LinuxCNC and Mesa cards.
« Reply #9 on: April 04, 2021, 06:02:25 AM »
I procrastinated as long as possible, but it is time to play workshop tetris.


Best regards, Meilleures salutations, Mit freundlichen Grüßen, Cu salutari
Mark
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Offline RotarySMP

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Re: Schaublin 125-CNC retrofit to LinuxCNC and Mesa cards.
« Reply #10 on: April 11, 2021, 06:04:02 AM »


Best regards, Meilleures salutations, Mit freundlichen Grüßen, Cu salutari
Mark
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Offline Pete.

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Re: Schaublin 125-CNC retrofit to LinuxCNC and Mesa cards.
« Reply #11 on: April 11, 2021, 09:03:58 AM »
Looks like there's very little grease in those bearings, but then again most people tend to over-grease them. When I put new spindle bearings into my Hardinge lathe I looked up the manufacturer's spec for the amount of grease to use and I was surprised at the small amount required - 4.6cc

 

Offline RotarySMP

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Re: Schaublin 125-CNC retrofit to LinuxCNC and Mesa cards.
« Reply #12 on: April 11, 2021, 09:49:10 AM »
Thanks for that. I knew it was only a small amout, like 15 or 25%, butit is nice to see the table with the amount in g. I'll use that.
Mark
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Mark
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Offline philf

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Re: Schaublin 125-CNC retrofit to LinuxCNC and Mesa cards.
« Reply #13 on: April 11, 2021, 05:30:33 PM »
I assume you haven't got access to the inner race of the front bearing behind the labyrinth seal. To remove front bearing would mean putting pressure on the outer race to drive off the inner race which isn't recommended bearing practice. If the bearing is very tight on the spindle you might exceed the axial loading limit and damage the bearing. If the bearings feel very smooth I'd go for injecting a small amount of grease.

Having said that the lower bearings on my mill are much smaller a/c bearings and a stuck 2 morse taper attachment takes a sharp knock on the end of the drawbar to release and 30 years of sharp knocks doesn't seem to have done the bearings much harm. (And they've never been regreased.)
Phil Fern
Location: Marple, Cheshire

Offline RotarySMP

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Re: Schaublin 125-CNC retrofit to LinuxCNC and Mesa cards.
« Reply #14 on: April 11, 2021, 05:41:21 PM »
Yeah, the only way to put force on the inner race of the front pair is through the labrynth seal, which is cast iron. I have  nightmares of it going Ping,  as it must hae plent of non-radiused corners.

If the belt hadn't failed, I probably would have taken my chances with the 40 year old grease. Kluber is very good quality grease.
Mark
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Mark
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Offline BillTodd

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Re: Schaublin 125-CNC retrofit to LinuxCNC and Mesa cards.
« Reply #15 on: April 12, 2021, 05:01:57 AM »
I would not take that spindle apart !

I have replaced lathe spindle bearings on simpler  lathe spindles - as you say - major pucker factor  - even simple lathes have very expensive bearings !

I'd either lubricate in place or leave be.

The bearings and grease on my HLV-H are now 55 years old and still OK, I have the urge to pull them and lubricate too.
Bill

Offline mattinker

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Re: Schaublin 125-CNC retrofit to LinuxCNC and Mesa cards.
« Reply #16 on: April 12, 2021, 07:42:10 AM »
Mark,

I definitely wouldn't take it apart, a long soak in solvent, I'd then try to "flush" it with diesel with your syringe before re-rinsing in solvent blow dry and grease!

"If it aint broke" ............................

Cheers, Matthew

Offline RotarySMP

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Re: Schaublin 125-CNC retrofit to LinuxCNC and Mesa cards.
« Reply #17 on: April 25, 2021, 06:23:40 AM »
Thanks. Yep, that is what I did...

Best regards, Meilleures salutations, Mit freundlichen Grüßen, Cu salutari
Mark
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Offline mattinker

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Re: Schaublin 125-CNC retrofit to LinuxCNC and Mesa cards.
« Reply #18 on: April 25, 2021, 09:36:49 AM »
So i saw!

Gave you a like!!

If by chance you find yourself in Paris, (Le Bourget air show?) look me up!

Cheers, Matthew

Offline RotarySMP

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Re: Schaublin 125-CNC retrofit to LinuxCNC and Mesa cards.
« Reply #19 on: April 25, 2021, 10:18:54 AM »
Thanks. I went to the Paris air show once. Must have been about 1999 or so. Very cool.
Mark
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Mark
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Offline BillTodd

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Re: Schaublin 125-CNC retrofit to LinuxCNC and Mesa cards.
« Reply #20 on: April 25, 2021, 02:51:28 PM »
Tip for pulling reluctant dowlpins  , use an er collet chuck to grab the pin and threaded rod as a  diy slide hammer.
Bill

Offline awemawson

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Re: Schaublin 125-CNC retrofit to LinuxCNC and Mesa cards.
« Reply #21 on: April 25, 2021, 03:29:38 PM »
And when you replace them always put one in with a female extractor thread - dead easy to do, and the next bloke to come along will thank you !

(Had that issue with the powered tooling gear boxes on my CNC lathe, making a female threaded dowel was the work of minutes on the lathe.)
Andrew Mawson
East Sussex

Offline RotarySMP

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Re: Schaublin 125-CNC retrofit to LinuxCNC and Mesa cards.
« Reply #22 on: April 26, 2021, 01:00:40 AM »
Good points. I'll check if these are hardened, and if not I could drill and tap the end.
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Mark
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Offline RotarySMP

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Re: Schaublin 125-CNC retrofit to LinuxCNC and Mesa cards.
« Reply #23 on: June 20, 2021, 06:35:35 AM »
Best regards, Meilleures salutations, Mit freundlichen Grüßen, Cu salutari
Mark
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