Gildemeister NEF 480 Retrofit

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22 Feb 2021 08:51 #199687 by RotarySMP
Good on you for getting those out. Novel use of a tool holder:)
Mark

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24 Feb 2021 21:04 #200027 by anfänger
Thanks for the tip with the sliding hammer. First try with m6 failed, but then I cut a m8 thread and got those little guys out and the cross slide off die cleaning.







Now I wonder if I should try to get the carriage also off. But I am not sure if I can manage this. I wonder if pumping degreaser through the system would be enough.

To save some time and money I will reuse the old belts and pulleys before I get new ones with a slower ratio. So I fitted them to the new servos





And the new plate for the control arrived


Today was a satisfying everything in the shop.

Thanks for listening

Patrick
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24 Feb 2021 21:25 #200033 by tommylight

Today was a satisfying everything in the shop.

Glad someone is having fun in the shop, i have not been in my shop for the last 3 days, waiting and waiting and ... never mind. :)

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25 Feb 2021 07:38 - 25 Feb 2021 07:47 #200065 by RotarySMP

Thanks for the tip with the sliding hammer.



vs



Looks like the appropriate application of "of it doesn't fit, don't force it, use a bigger hammer!" :)
Glad you got them moved.
Mark
Last edit: 25 Feb 2021 07:47 by RotarySMP.
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25 Feb 2021 07:44 - 25 Feb 2021 07:48 #200067 by anfänger
I am really glad auswelle! It‘s not always easy after a day at work to get my up. But it‘s a nice contrast to my daily work, which is mostly sitting in front of a computer. And as much as I enjoy seeing something real done with my own hands / code ist quite satisfying. But I‘m a self taught machinist and so there is a lot of room for error and frustration. Like last week wehere I spend a whole evening trying to remove the cross slide. But when I make progress then it’s incredibly satisfying.
Last edit: 25 Feb 2021 07:48 by anfänger.

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25 Feb 2021 07:49 #200068 by RotarySMP
It is the same for me. Especially with home office, sitting at my laptop in my bedroom for hours, I appreciate the time working on the machines as a contrast.

But I am not sure if I can manage this. I wonder if pumping degreaser through the system would be enough.

You know that the one blocked line, which will cause the galled way, is the one which degreaser wont clear.
Mark

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25 Feb 2021 08:36 #200072 by anfänger
I was so afraid someone would say that...

Any suggestions how?
I thought a lot about it while remaking the pulleys.
I can’t remove the the carriage with the ballsrew.
So i was thinking of detaching the ball nut from the carriage (hoping the to mange to get the oil line reattached later). And then removing the rear support of the ballsrew and some how pulling and lifting the carriage of in the end. Not really looking forward to this. And I think I will crap my pants more than once doing it.

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25 Feb 2021 09:20 #200074 by RotarySMP
I cant really picture what the build up of the carriage is. Normally CNC machines are much simpler than manual machines in that area. Is it an access problem?
Mark

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25 Feb 2021 09:43 #200076 by anfänger
This is more or less a normal lathe. With a very professional CNC conversion. The main spindle part looks more or less like the one on a normal lathe. I haven’t figured out how to remove the „lead srew“ so I need to remove the carriage with the lead screw attached to the spindle stock. But I think I will give it a try this evening. It’s German engineering so there should be a was to remove the leadscrew without disassembling the main spindle.

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25 Feb 2021 10:58 - 25 Feb 2021 11:24 #200080 by sivaraj
Just checking the carriage gibs and lubrication lines are enough .
Lubrication is important for these type of carriages.
There will be either turcite or SKC coating on 'V' groove - nothing to clean there .
Unless you see guide ways gibs are loose and not holding to the ground surface not necessary to remove the carriage .
Just apply oil to the guide-ways surfaces which is sufficient to start moving smooth ..
Also on ball-screw side motor end bearing are important to look.
Either it can be lifetime greased angular contact bearings or thrust bearing which normally not required to service this unless abnormal load on ball-screw rotation - check after unscrewing the ball-nut from carriage .Tail end bearing is just to support ball-screw .Not necessary to remove and clean.
Last edit: 25 Feb 2021 11:24 by sivaraj.

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