Some DRO scale mounting pictures for your review

Discussion on all milling machines vertical & horizontal, including but not limited to Bridgeports, Hardinge, South Bend, Clausing, Van Norman, including imports.

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acrosteve
Posts: 4
Joined: Thu Jan 30, 2020 8:37 pm

Some DRO scale mounting pictures for your review

Post by acrosteve » Sat Feb 08, 2020 8:28 pm

Finally getting around to putting a DRO on my Bridgeport. Went with a Chinese import. Scales shipped from USA, but the DRO is stated to ship on the 10th(Monday)

Anyway, I got measured my travel and got the closest glass scales available. Turns out that the 700mm for my X covered my coolant drain holes. I did some checking and found I could shorten the scale to just inside the holes and still have the needed travel.

The scale for my quill was just a bit long also, so I shortened it too.

Anyway, I will post an update when I get the actual DRO - it is an LCD model. So I am looking forward to the enhanced graphic based features.
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Last edited by Harold_V on Sun Feb 09, 2020 2:38 am, edited 1 time in total.
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acrosteve
Posts: 4
Joined: Thu Jan 30, 2020 8:37 pm

Re: Some DRO scale mounting pictures for your review

Post by acrosteve » Sat Feb 08, 2020 8:29 pm

And some pics of the scale modification process.

I just cut the housing with a hack saw, then scored the glass with dremel diamond - back from the edge so the endcap could fit without interference. The double cut produced the gap where I could insert the dremel
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NP317
Posts: 2478
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Location: Northern Oregon

Re: Some DRO scale mounting pictures for your review

Post by NP317 » Sat Feb 08, 2020 9:05 pm

How did you cut the glass scales without damage?
Nice installation.
RN

pete
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Joined: Tue Feb 10, 2009 6:04 am

Re: Some DRO scale mounting pictures for your review

Post by pete » Sun Feb 09, 2020 4:35 am

With a rear mounted X axis scale like that I'd add a block clamped to the Y axis dovetail as a semi permanent way to protect your scale and it's guard to keep the table from moving too close to your column. It's not if you'll forget and run it into the column, only how long before you do. The rest looks well done as long as the scales are aligned to each axis of travel within the specifications.

acrosteve
Posts: 4
Joined: Thu Jan 30, 2020 8:37 pm

Re: Some DRO scale mounting pictures for your review

Post by acrosteve » Sun Feb 09, 2020 6:50 am

I just cut the scale housing with a hack saw, then scored the glass with dremel diamond - back from the edge so the endcap could fit without interference. The double cut produced the gap where I could insert the dremel




Thanks for the tip about the stop. I can't decide if I want to drill another hole, or use the center wiper hole

pete
Posts: 1924
Joined: Tue Feb 10, 2009 6:04 am

Re: Some DRO scale mounting pictures for your review

Post by pete » Sun Feb 09, 2020 7:06 am

No need to drill hole, just make it a two piece stop to match the dovetail angle and use a bolt above the angle to clamp it in place on the dovetail itself. The clamp just holds it in place but the stop should be against the column and wide enough so the scale guard can't touch the column.

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NP317
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Location: Northern Oregon

Re: Some DRO scale mounting pictures for your review

Post by NP317 » Sun Feb 09, 2020 11:42 am

I made a Y-axis stop from a piece of 1/2" dia. brass rod, screwed into a threaded hole in the back of the table.
Pic attached.
It works just fine and instantly tells my hand I have reached the end of useful table movement
With no y-axis power feed, it has done the job safely.
RussN
Mill X-Axis3 small.jpg

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