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Digital Read Out Installation on the Benchtop Milling Machine


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Old 07-22-2018, 11:41:36 AM
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Photo Digital Read Out Installation on the Benchtop Milling Machine

I recently installed a DRO on my import bench top milling machine and decided to share some of the pictures. I picked up a two axis DRO with two scales for about $200 off ebay.

First pic is the 1983 Central Machinery 6" x 18" bench top mill when I purchased it ( quill handles not installed )

Second pic, first problem was no room on the back side of the table for the scale and reader. Since it's a small mill and I won't be putting any heavy parts on it, the front will work just fine.

Third, next difficulty was the oil fitting for the table. A little touch on the belt sander on the fitting gave enough room to mount the scale below table level.
note-- bracket was moved down to center reader after picture was taken. I also turned the reader and scale over so the X axis would read correctly. The negative and positive values were backwards.
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Old 07-22-2018, 11:49:56 AM
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Default Re: Digital Read Out installation on the benchtop milling machine

Next was the Y axis reader. Since that was longer than the casting, an adapter plate was needed. I had some 1/4" x 1-1/2" flat bar so that was used. I did the notch with my abrasive saw and smoothed it with my disk grinder.

I measure down and made each side the same distance down.

Next was attaching the scale to the bracket.

Since the casting had a taper to it, the easiest way to get the bracket at an angle that would work was to put it in the vise and "tune it" with a dead blow hammer.
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Old 07-22-2018, 11:56:14 AM
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Default Re: Digital Read Out installation on the benchtop milling machine

Final notes-- make sure you get the reader centered in the scale and the scale as parallel as possible to maximize accuracy. I was able to get within .002 from end to end on both scales.

The kit I purchased did not come instructions but there are various YouTube videos that show how to do it. I worked three decades in a job shop so adapting was second nature for me. It was actually quite easy to do.


Here's the DRO display and the covers for the scales.
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Old 07-22-2018, 12:30:50 PM
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Default Re: Digital Read Out installation on the benchtop milling machine

Nice write up. My machining skills are more of the torch, grinder and hand file. but my short list is getting a small mill and lathe to play with.
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Old 07-22-2018, 03:04:34 PM
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Default Re: Digital Read Out installation on the benchtop milling machine

Nice Looking Unit for $200.00

Was it new from a supplier (with more available) or used and just lucky to score it for that price ?

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Old 07-22-2018, 07:14:24 PM
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Default Re: Digital Read Out installation on the benchtop milling machine

You mounted it upside down to read correctly? You should not have to do that. I am not familiar with that particular instrument but try pressing "X", the plus/minus key, and enter to change the axis direction.
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Old 07-22-2018, 07:33:00 PM
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Default Re: Digital Read Out installation on the benchtop milling machine

Quote:
Originally Posted by OTTO-Sawyer View Post
Nice Looking Unit for $200.00

Was it new from a supplier (with more available) or used and just lucky to score it for that price ?

Here's the one I got, eBay item number:183155521956

The seller is
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development1979*

---------- Post added at 07:33:00 PM ---------- Previous post was at 07:31:18 PM ----------

Quote:
Originally Posted by tdmidget View Post
You mounted it upside down to read correctly? You should not have to do that. I am not familiar with that particular instrument but try pressing "X", the plus/minus key, and enter to change the axis direction.
I looked in the manual for about 20 minutes to try to find out how to switch it in the display.

I gave up and spent three or four minutes turning it end for end ( ao the cable exited on the right ) and it works perfectly now.
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Old 07-22-2018, 09:08:41 PM
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Default Re: Digital Read Out installation on the benchtop milling machine

I was wrong. Page 14 , step 4 of your operators manual. 3 decades,eh?
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Old 07-22-2018, 10:04:11 PM
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Default Re: Digital Read Out installation on the benchtop milling machine

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I was wrong. Page 14 , step 4 of your operators manual. 3 decades,eh?
In my manual, step 4 is on page 13 and deals with setting multiple offsets, continues on pages14. Not even close.

Yes, three decades at my previous employer in a job shop environment. Set up, programming and running horizontal CNC mills ( from 40"x 40" to 60" x 100") vertical CNC mills, CNC lathes ( including a 60 hp lathe with a 24" hydraulic chuck or 32" four jaw ) plus manual lathes, Bridgeports plus also did arc, mig and tig welding.

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Old 07-22-2018, 11:32:30 PM
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Default Re: Digital Read Out installation on the benchtop milling machine

For some reason This site will not allow me to paste a link . Go here: www.gt-e.en/pdf/dro/SINPO manual.pdf This is your manual.
PS Shit. It comes up in Russian. search Jing readout. On mine the first hit was it. look for yours in the pic. If you can't get it to work then Press "X", then "0" or "1" , then "enter" to change the counting direction. You probably need to get this manual be cause it does a lot more than count in 2 axes. For what it's worth there is a thread on Practical Machinist about these SINO DROs and they get pretty good reviews.
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