Gildemeister NEF 480 Retrofit

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28 Jun 2021 11:02 #213118 by anfänger
My belt pulled are ready to be shipped. So There might be more progress in the next weeks.
I allow started to tool up, so I can make chips with this beast.
Still an open question is the the chuck. I wonder if I should change it.
On one hand the Chuck is nice for repetitive work, but I think a normal chuck should be more versatile. I was thinking about simply holding a normal 160mm chuck in this 250mm beast, but everyone tole me it’s not safe. I am nit sure If I can fit a 160mm chuck to my din 55022/27 size 6 spindle nose. The mach plates for 160mm chucks are only available in size 5. Is a 160mm chuck on as size 6 just uncommon or impossible to fit

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04 Jul 2021 07:28 #213649 by anfänger
after some trouble the tight pulleys arrived:

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low I just need to make the locking devices to clamp the pulleys to the shaft. And make some light modifications to the housing to fit the new bigger pulley.
But this will get me from 0.0012 mm/p to 0.001 mm/p what are actually 0.00025mm/p with the servo drives. only issue at the moment it I don't get the index from the servos for homing but I can home without indes for now.
Looking forward to also get the Z-Axis moving

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04 Jul 2021 15:26 #213698 by anfänger
after some grinding the new pulley fits

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this session then ended when I tried to machine the the bore for the clamping thingies. the pulley is to big for ma old lathe and I can't clamp on the recess cause I can't flip it 180° cause the it won't fit.
So the new plan is too machine it in the mill, but this is not a Sunday project.

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05 Jul 2021 22:07 #213794 by andypugh
The small pulley flanges look to have gone missing?

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06 Jul 2021 04:56 - 06 Jul 2021 04:57 #213822 by anfänger
I used the old x axis pulley for testing. Without the flange it is easier to set up. It took me three tries before I had ground away enough for the belt to run without touching anything.
For final assembly the flanged pulley will be used.
Last edit: 06 Jul 2021 04:57 by anfänger.

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10 Jul 2021 15:40 #214185 by anfänger
got some shop time today and machined the threes and pocket for the clamping set in the pulley:

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a little later it was done, setting up took longer than machining.

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then all was a bit blurry 

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but after tightening everything up all axis were moving:



So it was time to close the oil tank

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so far it doesn't leak, the clutch is working again and the gears get oil. So now it's "just" tuning, some more work on config and the vcp. Before I can take the first cut. The new tools also arrived and they look way bigger than the old ones:

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The following user(s) said Thank You: tommylight

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11 Jul 2021 16:14 #214280 by anfänger
my pwmgen seems to be inverted at max rpm its 0 and at low rom it gives me 10v any ideas where to look?

I think I need to organize more. here my ini and Hal files

 

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File Name: ditte.ini
File Size:7 KB

 

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File Name: hm2-servo-7i97.hal
File Size:17 KB

 

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File Name: time.hal
File Size:5 KB


Thanks Patrick
Attachments:

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11 Jul 2021 16:26 #214283 by PCW
Replied by PCW on topic Gildemeister NEF 480 Retrofit
There were some changes to the 7I97 firmware so I would suggest
upgrading firmware. These changes:

1. Invert PWM
2. Force output to 0V when disabled

NOTE: this will invert all PWM channels so you may need to change the sign
of PWM scale to avoid runways


If you dont want to change the firmware you can just invert the PWM pin polarity on hal

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11 Jul 2021 16:38 #214284 by anfänger
Thanks for your quick reply, I would prefer to keep my firmware. How can I change polarity in Hal?

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11 Jul 2021 16:45 #214285 by PCW
Replied by PCW on topic Gildemeister NEF 480 Retrofit
setp hm2_7i97.0.pwmgen.0N.out0.invert_output true
The following user(s) said Thank You: anfänger

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