PDA

View Full Version : DRO for my M-head Bridgport Mill.



Lu47Dan
12-25-2012, 11:18 PM
I installed an Easson 2 axis DRO on my mill.
This thread will cover the high points of the installation.
http://i236.photobucket.com/albums/ff14/Lu47Dan/Emmas%20DRO%20Installation/DRO001.jpg
It arrived well packed without any damage.
http://i236.photobucket.com/albums/ff14/Lu47Dan/Emmas%20DRO%20Installation/DRO002.jpg
The Head Unit.
http://i236.photobucket.com/albums/ff14/Lu47Dan/Emmas%20DRO%20Installation/DROIG001.jpg
Where the bracket to mount the head unit will mount.
http://i236.photobucket.com/albums/ff14/Lu47Dan/Emmas%20DRO%20Installation/DROIG002.jpg
The mounting bracket almost finished.
I went through three or four bracket designs before I decided on this one.
Dan.

Lu47Dan
12-25-2012, 11:33 PM
http://i236.photobucket.com/albums/ff14/Lu47Dan/Emmas%20DRO%20Installation/DROIG003.jpg
The head unit mounting foot side of the bracket.
http://i236.photobucket.com/albums/ff14/Lu47Dan/Emmas%20DRO%20Installation/DROIG004.jpg
The bracket hit the axle of the rams tilt mechanism. The hole I drilled was off center a bit so I had to oblong it.
http://i236.photobucket.com/albums/ff14/Lu47Dan/Emmas%20DRO%20Installation/DROIG006.jpg
Head unit mounting arm bracket installed.
http://i236.photobucket.com/albums/ff14/Lu47Dan/Emmas%20DRO%20Installation/DROIG007.jpg
Another view of the arm.
Dan

Lu47Dan
12-25-2012, 11:40 PM
http://i236.photobucket.com/albums/ff14/Lu47Dan/Emmas%20DRO%20Installation/DROIG010.jpg
Head unit mounted.
http://i236.photobucket.com/albums/ff14/Lu47Dan/Emmas%20DRO%20Installation/DROIG015.jpg
Y-axis scale installed.
http://i236.photobucket.com/albums/ff14/Lu47Dan/Emmas%20DRO%20Installation/DROIG016.jpg
Y-axis works.
On to the X-axis.
Dan.

Lu47Dan
12-25-2012, 11:58 PM
I had a bunch of OPP's to do in the last few months that delayed the finishing of this project.
I was tried of squirting oil on the ways to lube them so I decided to clean the ways of the grease the previous owner had used to lube the ways.
After cleaning the grease from the ways and all the oil passages I installed the saddle and started installing the X-axis scale.
http://i236.photobucket.com/albums/ff14/Lu47Dan/Emmas%20DRO%20Installation/DROIG019_zpsa780a822.jpg
Scale mounting hole located and drilled with a 1/8" hole for a pilot hole.
http://i236.photobucket.com/albums/ff14/Lu47Dan/Emmas%20DRO%20Installation/DROIG020_zpsceff01cf.jpg
Drilled to 5mm tap drill size.
http://i236.photobucket.com/albums/ff14/Lu47Dan/Emmas%20DRO%20Installation/DROIG021_zpsef479e9c.jpg
Tapped to 6mm - 1.0.
http://i236.photobucket.com/albums/ff14/Lu47Dan/Emmas%20DRO%20Installation/DROIG022_zps14a535f9.jpg
Scale installed.
Dan.

Lu47Dan
12-26-2012, 12:10 AM
http://i236.photobucket.com/albums/ff14/Lu47Dan/Emmas%20DRO%20Installation/DROIG024_zpsdadbfd3a.jpg
The scale shield came next.
http://i236.photobucket.com/albums/ff14/Lu47Dan/Emmas%20DRO%20Installation/DROIG025_zps5a72ac7e.jpg
Installing the table.
http://i236.photobucket.com/albums/ff14/Lu47Dan/Emmas%20DRO%20Installation/DROIG026_zpsb56938c5.jpg
Ready to install the lead screw, one of the reasons I pulled the table and saddle off and cleaned the ways was that the adjusters for for the leadscrews would not adjust. It turned out that the notch in the single piece nuts were packed with crud. The X-axis had 0.090" backlash in it. This was a pain in the butt when making parts. After I cleaned it up I and adjusted the nuts I got it down to 0.030" I will in the future order a new set of nuts and leadscrews.
Dan.

Lu47Dan
12-26-2012, 12:17 AM
The next step was to install the scale again and make something to mount the reader head to the saddle.
http://i236.photobucket.com/albums/ff14/Lu47Dan/Emmas%20DRO%20Installation/DROIG029_zps541887b0.jpg
This is the start of the reader head/stop plate mounting block.
http://i236.photobucket.com/albums/ff14/Lu47Dan/Emmas%20DRO%20Installation/DROIG031_zpsc9df748f.jpg
Block laid out.
http://i236.photobucket.com/albums/ff14/Lu47Dan/Emmas%20DRO%20Installation/DROI039_zps75407c70.jpg
Parts mocked up.
http://i236.photobucket.com/albums/ff14/Lu47Dan/Emmas%20DRO%20Installation/DROI040_zpsbb6705f2.jpg
First mounting hole done second ready to drill.
Dan.

Lu47Dan
12-26-2012, 12:25 AM
http://i236.photobucket.com/albums/ff14/Lu47Dan/Emmas%20DRO%20Installation/DROIG033_zpsdfe8ac91.jpg
Second mounting hole finished.
http://i236.photobucket.com/albums/ff14/Lu47Dan/Emmas%20DRO%20Installation/DROIG034_zps49bcd7a5.jpg
Header head plate mounting screw holes drilled but not tapped.
http://i236.photobucket.com/albums/ff14/Lu47Dan/Emmas%20DRO%20Installation/DROIG035_zps9130527d.jpg
Parts assembled for final fitting and lay out of reader head mounting slots.
http://i236.photobucket.com/albums/ff14/Lu47Dan/Emmas%20DRO%20Installation/DROIG036_zps31dfe00f.jpg
The stop plate. I cut this down to 1.625 in width. It will hit the column before the shield does to avoid damage to the scale.
Dan.

Lu47Dan
12-26-2012, 12:34 AM
http://i236.photobucket.com/albums/ff14/Lu47Dan/Emmas%20DRO%20Installation/DROIG038_zps706ca4b6.jpg
Tapping the first mounting hole.
http://i236.photobucket.com/albums/ff14/Lu47Dan/Emmas%20DRO%20Installation/DROIG040_zps5939c1ff.jpg
The mounting block installed to locate second hole.
http://i236.photobucket.com/albums/ff14/Lu47Dan/Emmas%20DRO%20Installation/DROIG042_zps2b515737.jpg
Both mounting holes drilled and tapped.
http://i236.photobucket.com/albums/ff14/Lu47Dan/Emmas%20DRO%20Installation/DROIG043_zps982cbf55.jpg
Mounting block, stop plate and reader head mounting plate test fitting, before removing them to install the new felt wipers I bought.
There were only three short wipers left on the saddle. So I ordered a set of new full width felt wipers.
Dan.

Lu47Dan
12-26-2012, 12:39 AM
http://i236.photobucket.com/albums/ff14/Lu47Dan/Emmas%20DRO%20Installation/DROIG044_zps5b3035a5.jpg
Chip/swarf shield installed.
http://i236.photobucket.com/albums/ff14/Lu47Dan/Emmas%20DRO%20Installation/DROIG045_zps66538984.jpg
Y-axis chip/swarf shield installed.
http://i236.photobucket.com/albums/ff14/Lu47Dan/Emmas%20DRO%20Installation/DROIG046_zpsb570b459.jpg
New felt wiper.
http://i236.photobucket.com/albums/ff14/Lu47Dan/Emmas%20DRO%20Installation/DROIG047_zpsa9e1737c.jpg
Felt wiper installed.
Dan.

Lu47Dan
12-26-2012, 12:43 AM
http://i236.photobucket.com/albums/ff14/Lu47Dan/Emmas%20DRO%20Installation/DROIG049_zpse2feb37b.jpg
I now have a functioning DRO.
I still have a few little things to finish up. But it now works.
I now have to learn all the functions.
Dan.