Thanks: 0
Needs Pictures: 0
Picture(s) thanks: 0
Results 16 to 27 of 27
Thread: Face plate runout
-
22nd June 2013, 10:08 PM #16
-
22nd June 2013 10:08 PM # ADSGoogle Adsense Advertisement
- Join Date
- Always
- Location
- Advertising world
- Age
- 2010
- Posts
- Many
-
22nd June 2013, 10:10 PM #17Member
- Join Date
- Oct 2011
- Location
- Brisbane
- Posts
- 65
-
22nd June 2013, 10:34 PM #18SENIOR MEMBER
- Join Date
- Jun 2012
- Location
- SA
- Posts
- 1,478
I agree on the axial bit Stuart.
Would the reworked face plate actually be flat ?
My understanding is that the centre will cut slightly deeper than the perimeter, as lathe cross slides are set up to do that. I seem to remember CBA Melbourne mentioning this is a measure to prevent mating facing surfaces from "rocking".
I can't see any benefit of measuring on the outside of the spindle flange as the OP stated. That isn't a mating or locating surface.
The radial measurement of the spindle flange should be taken on the stepped section that keys into the rear of the chuck etc if it's a bolt up type.
The critical factor would be, how well does the faceplate locate on that "peg".
Rob
-
22nd June 2013, 10:47 PM #19
No.... you don't divide by 2 ( at least I don't think so ) you are rotating the part around the center point, so you're measuring the distance from center to minumum radius and center to maximum radius that you will read on an indicator, and the radial runout is the difference in radius of two circles that fully enclose the surface being measured... just directly subtract max and min readings is all you need to do. ( I could possible find a reference somewhere )
Regards
Ray
-
22nd June 2013, 11:24 PM #20
Here you go...
radial_runout.jpg
Hope that makes it a bit clearer.. just subtract the minimum from the maximum.
Regards
Ray
-
22nd June 2013, 11:48 PM #21GOLD MEMBER
- Join Date
- Jul 2010
- Location
- Melbourne
- Posts
- 7,775
-
23rd June 2013, 08:35 AM #22Philomath in training
- Join Date
- Oct 2011
- Location
- Adelaide
- Age
- 59
- Posts
- 3,149
-
23rd June 2013, 01:59 PM #23GOLD MEMBER
- Join Date
- Jul 2010
- Location
- Melbourne
- Posts
- 7,775
-
23rd June 2013, 02:03 PM #24
Hi Stuart,
Wrong question, the question should be what do you do if you want to turn something flat to better than 0.02 in 300? forget the faceplate....
Regards
Ray
-
23rd June 2013, 02:27 PM #25GOLD MEMBER
- Join Date
- Jul 2010
- Location
- Melbourne
- Posts
- 7,775
-
23rd June 2013, 02:57 PM #26
No not long at all......just as long as you don't buy a new mill to distract you half way through the job..
My Mars's faceplate has a cast in radius at the front edge. It is not even all the way round and it drives me nuts looking at it spin. I faced it ages ago, it still runs without runout every time i use it. Its not like it changes a little bit every time i put it on (threaded nose)
Cheers,
Ew1915 17"x50" LeBlond heavy duty Lathe, 24" Queen city shaper, 1970's G Vernier FV.3.TO Universal Mill, 1958 Blohm HFS 6 surface grinder, 1942 Rivett 715 Lathe, 14"x40" Antrac Lathe, Startrite H225 Bandsaw, 1949 Hercus Camelback Drill press, 1947 Holbrook C10 Lathe.
-
24th June 2013, 08:11 PM #27GOLD MEMBER
- Join Date
- Aug 2011
- Location
- Melbourne
- Posts
- 2,951
I can understand what PC said about the edge or periphery of the FP. it's neither here or there if it's not running true (radially) but boy it's distracting. After you have dialled in a piece of work, it's nice to see everything rotate with little or no noticable movement (yea I know, it only happens with round stuff but you know what I mean) but then your eye catches the wobble on the edge of the FP and for a second I think the workpiece has moved or something!
Cheers,
SimonGirl, I don't wanna know about your mild-mannered alter ego or anything like that." I mean, you tell me you're, uh, super-mega-ultra-lightning babe? That's all right with me. I'm good. I'm good.
Similar Threads
-
Face plate fix
By Stustoys in forum METALWORK FORUMReplies: 35Last Post: 13th November 2010, 12:42 AM -
face plate problems
By weisyboy in forum WOODTURNING - GENERALReplies: 11Last Post: 23rd October 2007, 09:26 PM -
Face Plate Clamping
By Sterob in forum METALWORK FORUMReplies: 20Last Post: 3rd May 2007, 11:53 PM -
face plate question
By lubbing5cherubs in forum WOODTURNING - GENERALReplies: 24Last Post: 4th March 2007, 01:02 AM -
Face plate?
By A.WILLIAMS in forum WOODTURNING - GENERALReplies: 4Last Post: 30th September 2006, 02:06 AM