Installing a DRO Digital Read Out on a Lathe

[henryarnold]

(07-29-2012, 03:24 PM)ScrapMetal Wrote:

(07-29-2012, 12:44 PM)henryarnold Wrote: I also forgot to mention that because my lathe is a 10" instead of a 12", my cross slide is too short to fully contain the cross slide scale. Without a backing plate, the scale would hang out unprotected on each end of the cross slide. The backing plate and cover provide protection to the scale.

You guys have me thinking about how to recreate the function of my cross slide lock. I was thinking of a set screw that comes from the top of the cross slide and pushes against the non sliding top surface of the dovetail. What do you think? Is pushing against the gib the only proper way to lock the cross slide?



BTW, I didn't mention it but my cross slide scale pickup mount purposely sticks out just far enough to act as a bumper against the tail stock if hit. This protects the scale pickup from being damaged. Thanks to those who warned about this danger.

I see a couple possible problems with using a "lock" like that. First, you may run the risk of putting "dimples" in the top of the slide making future locking less than accurate. Of more concern is that with a bit of wear you could be causing one side of the slide to lift adding all kinds of error to your cutting.

Just my gut reaction though,

-Ron

Ron,
That makes sense. I think I'll have to come up with another solution. Earlier in this thread someone suggested a pin on the other side of the cross slide but that pin would be pushing directly on the dovetail.
Henry

On Edit: I checked the earlier post in this thread and the pictures are all missing so I have no idea how he proposed to add the cross slide lock.
Henry Arnold