Finished installing the x and y axis for my DRO on the new PM450G mill.
I have to say that for the amount of work that goes into putting one of these on, I am not sure it is worth the savings of doing it yourself.
Either way, it came out pretty well. The one shot oiler on this thing just makes the way oil ooze out of the ways when you pull the lever, so I made sure the scales had a lot of extra clearance. The machine is basically always covered in a thin coat of Vactra...
I chose to have the y-axis scale fixed, and allow the read head to move back and forth this time. Hopefully I won't come to regret it, I figure the weak point on Chinese DRO's is the wire going into the read head. I added strain relief to the bracket, and I still have to devise a simple method to allow the wires to move with the y-axis. The covers are all fitted, but removed for the photo.
I also included two pic of the method I used for copying the angle of the base casting to the swivel vise so I could machine angled spacer blocks.
Yes, that is a piece of steel bolted an aluminum spacer for the y-axis read head. There should be no problem with it because there will not be any electrolytic fluid used, and everything is covered in oil from the one-shot oiler anyway. The scrapped paint under the y-axis came from a mounting bolt that needed to be shortened.