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Thread: Tapered Gib Adjustment
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14th Nov 2011, 10:21 AM #1.
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Tapered Gib Adjustment
The opportunity to fiddle with a second Deckel FPI at the Deutsches Museum, the first being Alan C-47 's, made me wonder if the heavy feel of the Y traverse on my Schaublin mill was normal. The traversing action on both Deckels was wonderfully light.
Yesterday I adjusted the gib. With side play measured by means of a DTI indicating off the side of the horizontal spindle head casting and considerable leverage applied to the extended overarms I found that 0.0005 " play results in less load on the handwheel than I had previously and loosened up to 0.001" has the thing feeling like a Deckel.
Schaublin do not mention gib adjustment in their operator's handbook. Obviously there must be some clearance to facilitate movement. But how much?
BT
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14th Nov 2011, 10:32 AM #2Diamond Member
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Gib Adjustment
Bob
Firstly welcome home to "The Great South Land" (with maybe some jet lag)
I read your gib adjustment question & do not know the answer to, how much is correct.
The Deckel is a beautiful machine with very nice smooth movements, I would like to get hold of a good Deckel Mill, as would many others I guess.
A long time back I had the job of operating a "Hauser" Jig Boring machine & it was in the same class as the Deckel, beautiful pieces of equipment.
Thanks for forwarding your photos from Oseas they were great.
regards
Bruce
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14th Nov 2011, 02:07 PM #3
Hi BT,
Welcome back!... and thanks again for those amazing pictures..
Phil (Machtool) would be the best to give you some tips on gib adjustment, but I remember a discussion at the scraping weekend, to the effect that the gib should close up on the ends before the middle. More stable and less inclined to rock.
I'd blue it and see how it pulls up, I think you want touches on the ends to be heavier than the middle.
Hopefully Phil will read this and set me straight..
Regards
Ray
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14th Nov 2011, 04:24 PM #4Most Valued Member
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Hi BT,
As others have said, Welcome back and thank you for the pictures.
Rays covered the gibs as long as they dont come off the ways and extremes of travel(I think), I'm guessing your Y axis doesnt do that. Is it as tight through the full travel?
Stuart
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14th Nov 2011, 05:16 PM #5
Bob...My FP-1 has straight gibs on the Y axis, and you are right regarding the scanty information re: their adjustment. I suspect that would have been covered in the first week of apprentice class circa 1948 when my mill was made.
I am out of town right now and hance away from my documentation and machine so I can't add to the discussion regarding play.
BTW the regulus thing didn't happen owing to seller ineptitude.
Gregoire
( caught up in the je ne c'est quoi of my nouvelle avion, zut alors!)It's all part of the service here at The House of Pain™
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14th Nov 2011, 07:16 PM #6.
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Je ne parle par Francais Gregoire but I'm guessing it's an Airbus thing. Maybe I will look through Wrench's scanned Deckel technical bulletins in hope of finding a suggestion. Philip "Metalman" may be able to enlighten me. He will be better acquainted with his 13 than I with mine.
Shame about the Reglus gizmo. After a few days in Lucerne I came to the realization that buying things Swiss is better done outside of Switzerland.
I don't want to bore you lot with my travel photos but if you can cope I will post some images of the Weiler LZ.. (?) I became enamoured with at the Munich museum along with a Weiler capstan.
BT
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14th Nov 2011, 07:19 PM #7Distracted Member
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Need you ask, Bob...?
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14th Nov 2011, 07:24 PM #8.
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14th Nov 2011, 08:21 PM #9
Hi Bob...
Pardon the French thang...I got caught up in the whole zeitgeist of it all.
Back to your gibs...you need to buy a small granite flat from carba-Tec to see if you can determine how much wear it has. I'm sure it could be scraped back flat and uniform fairly quickly. (or ground if you know someone so equipped).
I think gib wear always manifests itself as variable tightness through the range of axis travel. Restoring or replacing gibs should be fairly straightforward.
A old machine dealer once told me that the best machines were always the most worn as the shop guys would naturally use them first in preference to the more common machines on the floor. Makes our good machines a bit of hard work to restore, but they'll obviously last longer than us once fixed up.
GregoireIt's all part of the service here at The House of Pain™
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