Nonius 1/40 an Drehmaschinen Oberschlitten.

Ich habe mich immer gesträubt den Oberschlitten der Drehmaschine zum Konusdrehen zu verstellen, da das Einmessen zeitaufwendig ist. Meine Idee war nun einen Nonius zu machen, welcher wie bei einer Schiebelehre einfach und genau abzulesen ist. Um die maximale Auflösung zu erreichen, habe ich wegen der Enge die Größe 1/40 gewählt. Wegen der Rundung und wenig Platz sowie der Möglichkeit in beide Drehrichtungen zu verstellen ist die Ablesung der 1/100 Position jedoch von der Aussenseite notwendig, weshalb der Nonius in der Nullstellung Mitte nach links oder rechts mit dem Wert 9 beginnt und am Ende mit ebenfalls 0, 1, .... beginnt und dann zur Mitte mit 9, 0 aufhört. Die Einrichtung ist recht einfach, da an der Stelle der vorhandenen Winkelmarkierung jetzt die Mitte des Nonius angebracht wird. Zur Kontrolle der Aussenseite muss die dortige 0 Markierung mit dem Wert 39 der Winkeleinstellung auf beiden Seiten übereinstimmen.

Die Maschine ist eine CJM250 mit Getriebe und Digitalanzeige. Hier ist ein Bild des Einabus. Oberhalb der Noniusanzeige ist der Messstab für die Digitalanzeige sichtbar.

Attachment 44534

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Ein Gesundes Erfolgreiches Jahr wünscht euch Günter

Nicely done. I did something similar on my Mill head some time ago.
Attachment 44538
I was about to ask if the vernier scale position can be adjusted, but from the slots on it, I'm guessing it can.

Michael

Danke für die Bewertung,
ich hätte auch lieber eine gefräste oder gelaserte Skala gehabt, dies war jedoch bei den teuren Angeboten nicht möglich. Da ich in der Elektrik zuhause war und kurz vor Weihnachten auf die Idee kam das ganze über eine billige Leiterplatte zu realisieren. Die Präzision einer Leiterplatte ist für meine Zecke völlig ausreichend. Ich versuche noch den Kontrast über einen schwarzen Lötstopplack zu verbessern. Die verwendeten Muster also Gradskala 0 bis 45 in beide richtungen und der Nonius 1/40 schlugen mit jeweils 10 Euro zu Buche. Die Skalen habe ich mit AUTOCAD entworfen und dann in EAGLE importiert um die Fertigungsdaten für die Leiterplatten zu bekommen.

Servus aus München

You can translate this thread with the "Select Language" dropdown at the bottom of the page.

Great tip, Jon. I had no idea!

Translated. My German is much to rusty to get this all correct.

I've always resisted adjusting the top slide of the lathe for cone turning because the calibration is time-consuming. My idea was to make a nonius, which can be read easily and precisely like a caliper. In order to achieve the maximum resolution, I chose the size 1/40 because of the narrowness. Due to the rounding and little space as well as the possibility to adjust in both directions of rotation, the reading of the 1/100 position is necessary from the outside, which is why the vernier starts with the value 9 in the zero position in the middle to the left or right and also ends with 0 , 1, .... and then ends in the middle with 9, 0. Setup is fairly easy as the center of the vernier scale is now placed in the place of the existing angle mark. To check the outside, the 0 marking there must match the value 39 of the angle setting on both sides.

The machine is a CJM250 with gearbox and digital display. Here is a picture of the Einabus. The measuring rod for the digital display is visible above the vernier display.

<!-- BEGIN /var/www/html/homemadetools/protected/modules/zeus/views/tool/postUpdate.php -->
Thanks 2gsg2_muc! We've added your Lathe Nonius to our Lathe Accessories category,
as well as to your builder page: 2gsg2_muc's Homemade Tools. Your receipt:

<div id="blocks"> <div class="block b1 pngfix"> <div class="bimg"> <div> <a href="https://www.homemadetools.net/homemade-lathe-nonius"> <img src="/uploads/257551/homemade-lathe-nonius.jpeg"/> </a> </div> </div> <div class="head pngfix"></div> <div class="left pngfix"></div> <div class="right pngfix"></div> <div class="blockover b1 pngfix"> <div class="title"> <a href="https://www.homemadetools.net/homemade-lathe-nonius">Lathe Nonius</a> <span> by <a href="https://www.homemadetools.net/builder/2gsg2_muc">2gsg2_muc</a></span> </div> <div class="tags">tags: <a href='https://www.homemadetools.net/tag/lathe'>lathe</a>, <a href='https://www.homemadetools.net/tag/measurement'>measurement</a> </div> </div> </div> </div>
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After reading the translation and learning that this is a circuit board, that is brilliant!

Congratulations 2gsg2_muc - your Lathe Nonius is the Homemade Tool of the Week!

A nice addition to a lathe, and an especially clever use of a circuit board.

Some more good builds from this week:

End Mill Extension Sleeve by nova_robotics
Round Stock Cutting Method by Occasional machinist
Electric Scissor Lift by Metalgeria
Pin Chuck by Evgeniy Budilov
Vise Improvements by dgbreggin
Table Saw Modification by diy creative crafts
Washer Stamping Jig by JKeetonKnives
Mini Roller Bender by orioncons36
Vise Grip Rack by mr_modify1
Pin Vise by morsa
Nutcracker by Philip Davies
Lift Table by carl blum


2gsg2_muc - we've added your tool entry to our All Homemade Tool of the Week winners post. And, you'll now notice the wrench-on-pedestal award in the awards showcase in your postbit, visible beneath your username:

https://www.homemadetools.net/forum/...OfTheWeek4.pnghttps://www.homemadetools.net/forum/...eWeekIcon4.png

You've also been granted free lifetime Supporting Member status. I've cancelled your paid membership, and setup your free lifetime membership.

And, you'll be receiving a $100 online gift card, in your choice of Amazon (US-only), PayPal, or bitcoin. Please PM me your current email address and award choice and I'll get it sent over right away.

Nice work! :thumbsup:

Hello, I dit not ecpect to receive such a rating for a little help for easier adjustment of my upper carriage of my lathe. There is also alittle improvement for the scales, because the use of the nonius is for bpth directions I shortend the marks at both sides of the 0 for easier reading and a little expanation for reading the scale and also the numbers for the angle extented by the degree sign. The Paypal account is the same as for the log in.

Attachment 44556

Thank you very much.

Great, I've just sent over the $100 award via PayPal. Congrats again :hattip:

For me, the best bit is the use of PCB material to make it - quite a novel way to get around the problems of making one conventionally. Accuracy will be good because those things are done to quite fine tolerances.
Michael

Quote:

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Originally Posted by Occasional machinist

For me, the best bit is the use of PCB material to make it - quite a novel way to get around the problems of making one conventionally. Accuracy will be good because those things are done to quite fine tolerances.
Michael

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Incredibly cheap and you can do black masking with white inlay.

Nonius: A delightful little word with great history.

https://en.wikipedia.org/wiki/Nonius_(device)

Also a great word for Scrabble, and other esoteric language games.

Many thanks for the idea...obviously this works on other lathes which have identical radii ( from pivot to scale )...what are the maths behind these calculations ...how was the Vernier established?

Well the calculations are very simple, just calulate the perimeter by PHI and then draw a line with that length, which you have to devide it by 360 to receive the distance from one mark to the next, which gives you a ruler for the diameter for the circle in degrees. Next draw a line from the center a line fro the over the radius an arrange this line from the center by 360 parts, so you receive a division of 360 by 1°. Draw a second circle which is larger tha the first one, now you can shorten the lines from the center to the first circuit, next shorten the overhanging lines to the second circle. This way you receive a ring with 360 short lines arranged along the circle.
For more Information for calculating you can check at Wikipedia homepage.

thanks ! will try it...

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Thanks Occasional machinist! We've added your Mill Vernier Scale to our Measuring and Marking category,
as well as to your builder page: Occasional machinist's Homemade Tools. Your receipt:

<div id="blocks"> <div class="block b1 pngfix"> <div class="bimg"> <div> <a href="https://www.homemadetools.net/homemade-mill-vernier-scale"> <img src="/uploads/257661/homemade-mill-vernier-scale.jpeg"/> </a> </div> </div> <div class="head pngfix"></div> <div class="left pngfix"></div> <div class="right pngfix"></div> <div class="blockover b1 pngfix"> <div class="title"> <a href="https://www.homemadetools.net/homemade-mill-vernier-scale">Mill Vernier Scale</a> <span> by <a href="https://www.homemadetools.net/builder/Occasional+machinist">Occasional machinist</a></span> </div> <div class="tags">tags: <a href='https://www.homemadetools.net/tag/mill'>mill</a>, <a href='https://www.homemadetools.net/tag/scale'>scale</a> </div> </div> </div> </div>
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Hi,
I just received the new scales, I ordered due to wrong marking and changed them at my lathe.


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