This is a question to Brian and David and anyone else who has experience/opinion on adding a quill DRO.So, finally, I have my Mitutoyo DRO installed. I bet I've got 15-20 hours into this thing and this is revision 4.8.
First, I abandoned putting in a stop. There's a horizontal section of casting that precludes one from using the factory hole unless I cut the casting which I decided against.. I'd need a much larger piece coming off the spindle collar to thread in the stop to put it in front of the faceplate and I felt that would obstruct my view more.
That horizontal casting also stopped me from putting the DRO bar behind the faceplate. The hole I had made in the new faceplate fit the DRO perfect and was in the right location but the casting. Of course, I didn't 'discover' the casting in the way until I was on revision 2.
I ordered a new faceplate without the rectangle cutout. I tweaked the faceplate by reducing height by a few .01" to get it to fit just perfect and had the corners rounded a touch more.
I liked David's use of the rotary table for the spindle collar so I had to copy that, twice, maybe three times. It looks like it was done by a 10th grader in shop class.
I'd say there's no way I could get paid to do machinist work. My hourly wage would be .57 cents.
View attachment 318454 View attachment 318453
I'd seen a few set up like that and considered it at first. The reason I went with the rod was because it's a smaller form factor. I didn't want the larger beam part of the DRO obstructing my view. It would be nice to have the reader in the same spot, though.
Thank you both!I don't see any particular reason you couldn't do as you said. I have the Mitutoyo DRO on my PM1340 tailstock mounted as you describe. The challenge you will run into is alignment of the beam. If both the beam and display are anchored, the the beam has to be aligned to the dispaly at both ends of travel prior to locking the beam in position. My RF45 did not have a cavity in the head casting to accept the display unit, otherwise I would have attempted that version. Also, make sure you mount the display so that battery changes are easy.
For the record, I absolutely detest the Shars or any other Chinese-made digital scale like this. They all eat batteries like crazy. Watch this video, and this video. I own one of those Shars scales, and can confirm AvE's commentary. Mitutoyo RULES !!!Thank you both!
I will go for it. The battery will not be an issue with the DRO that I have (Shars, see pictures). The alignment is something I think I can do. I will post pictures when I am done.
View attachment 321566 View attachment 321567 View attachment 321568
View attachment 321569
Your quill moves?Did anyone measure the actual quill travel of the PM833? The spec is 5", I measure only 4"+ of travel. Not sure if something was assembled wrong in my mill or the spec was just "stretched" to look better or maybe the absence of a quill DRO allowed some "creativity"
Mystery solved... It's probably better to wait till the morning to look again at problems...Did anyone measure the actual quill travel of the PM833? The spec is 5", I measure only 4"+ of travel. Not sure if something was assembled wrong in my mill or the spec was just "stretched" to look better or maybe the absence of a quill DRO allowed some "creativity"
I don't know if it is fair to assume that everything from Taiwan got worse because of this mismatch. I think that they made a mistake by picking a 21mm hex size for the drawbar head. I looked at my old RF25 drill/mill and the hex size there is 17mm. Obviously this is a bigger machine with more power so the main spline shaft is beefier so someone thought that "bigger is better" and used a 21mm hex head. I believe that standard BP drawbar size is 3/4" or 19mm which might be an easy fix for this machine. Precision Matthews (QMT) - are you listening?I would expect this kind of thing from mainland China, but not from Taiwan. Seems like the Taiwanese machines are getting pretty sloppy in some areas. The original J-head on my PM935 was flawed and had to be replaced.
Yes, I am happy with the mill so far but not sure that I am a great benchmark (at least not yet...)For the record, my comment about declining QC standards in Taiwan was not based solely on your drawbar hex-head. Indeed, I have a observed a continuing list of issues and complaints that would not have been present 10-15 years ago. The dive to the bottom has clearly infected a once superior manufacturing community.
That said, I’m glad you are lavishing praise on the results this mill is producing. We should do a bake-off comparison of your 833 against my 935 on removal rates, tolerances and surface finishes achieved using the same tooling. I have $20 that says your 833 wins.
We get it, advertisements are annoying!
Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.