Degree graduation strip

This topic has 13 replies, 10 voices, and was last updated 23 December 2016 at 19:44 by Bazyle.

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22 December 2016 at 18:12 #273308
sean logie
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@seanlogie69385
My topslide doesn't have any markings at all to tell me what angle the topslide is sitting at . I'd like to fit one to speed things up a bit . Can someone tell me the proper name so i can go looking for one .

Thanks

Sean
Advert

22 December 2016 at 18:12 #8454
sean logie
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@seanlogie69385
22 December 2016 at 18:29 #273312
Iain Downs
Participant
@iaindowns78295
I have an angle gauge which I got from lidl for a tenner or so. You can probably get them from ebay. The one I bought looks like this one on ebay, but was quite a bit cheaper.

You can set the angle to 1/10th of a degree, which is certainly good enough for me. In fact there was a nasty piece of plastic on my cross slide which I was pleased to remove.
22 December 2016 at 18:47 #273319
Bazyle
Participant
@bazyle
Protractor?
22 December 2016 at 19:05 #273320
sean logie
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@seanlogie69385
Interesting bit of kit …..

http://www.zettlex.com/products/incoder/
22 December 2016 at 19:11 #273321
John Haine
Participant
@johnhaine32865
Sean they are not normally "fitted" but engraved on the cross-slide surface with a fiduciary mark on the topslide base. Short of dismantling the lathe and getting one engraved, your best bet is probably to buy a suitable engineers protractor and use it to set the angle, probably relative to a test bar in the chuck.
22 December 2016 at 20:08 #273330
Chris Evans 6
Participant
@chrisevans6
I made a new cross slide for my lathe, if you have a rotary table it is a simple job to engrave the degrees on the mill with a pointed tool.
22 December 2016 at 21:13 #273341
wheeltapper
Participant
@wheeltapper
Hi

I posted this on another forum, it may help you.

**LINK**

cheers Roy.

Edited By wheeltapper on 22/12/2016 21:33:27
22 December 2016 at 21:24 #273343
Chris Evans 6
Participant
@chrisevans6
Nothing beats a sine bar or accurate wedge to set the slide if you want real accuracy.
23 December 2016 at 08:03 #273372
Russell Eberhardt
Participant
@russelleberhardt48058
Posted by Chris Evans 6 on 22/12/2016 21:24:27:

Nothing beats a sine bar or accurate wedge to set the slide if you want real accuracy.

That does of course assume that the edge of the topslide is truly parallel to the dovetail slide. Worth checking.

Russell
23 December 2016 at 17:43 #273453
Georgineer
Participant
@georgineer
From the title I thought this thread was going to be about people taking off their gowns, hoods and mortar boards.

George
23 December 2016 at 19:00 #273466
Howard Lewis
Participant
@howardlewis46836
+1 for graduating the top slide, so that you never have to be concerned about this again.

May I suggest:

1) Remove the Top Slide.

2) Make a Fiduciary (datum) mark on the centreline of the spindle about which the Top Slide pivots.

3) Using a protractor (or whatever more accurate means you have available, such as digital angle gauge, sine bar, rotary table, dividing head, etc) scribe graduations on the Top Slide.

4) Reassemble, no longer have the problem, and have a Happy Christmas.

Howard
23 December 2016 at 19:09 #273468
Anonymous
Posted by Georgineer on 23/12/2016 17:43:39:

From the title I thought this thread was going to be about people taking off their gowns, hoods and mortar boards.

Me too, although it's a long time since I've worn any of those items.

Andrew
23 December 2016 at 19:44 #273474
Bazyle
Participant
@bazyle
Seriously how often do you expect to set the topslide to 43 degrees, or 21 or etc. In practice you only require 3 or 4 actual settings. SO make a reference mark on the topslide and when you set it for screwcutting using a protractor or gauge of some sort make a corresponding mark. Any time you are doing a serious angle like for a Morse taper the graduations won't be accurate enough anyway.

edit – I wore my gown a couple of weeks ago at the company xmas dinner. It comes in handy for fancy dress in this case Super Hero member of the Cornish Pasty Eating Squad. (CPEQ is our department name so it sort of fits.) Mortar board hasn't been the same since the mice eat the tassel.

Edited By Bazyle on 23/12/2016 19:58:52
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