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DRO for Lathe Questions

gr71

Plastic
Joined
Mar 30, 2015
I have a Jet 1340 lathe and I want to add a DRO

First: The problem with all the brands is that the cross slide scale covers the cross slide lock.

I can't put the scale on the spindle side if I wanted to.

Do most people just go without the lock or do they make a new one somewhere else? I don't use it often but I do use it.

If you move it, where to? I've thought about drilling and tapping the top of the cross slide and placing a set screw that comes down on the top of the dove tail. The non-slidy part.

Second: Optical or Magnetic?

Third: What is the best brand for the money.

Acu-rite seems nice but pricey. DRO Pros?

Let me know what you think.
 

rklopp

Diamond
Joined
Feb 27, 2001
Location
Redwood City, CA USA
I volunteer in the local high school's robotics program and put a DRO Pros glass scale DRO on their Jet 1340. It's been fine for about 3 years now, with student use and abuse. My only complaint about the DRO Pros unit is that it shows diameter (X) to the 1/2-tenth, i.e., 0.00005, which is useless and mostly just flickers. I have not found a setting short of masking tape to make the last digit disappear. Even the lathe is surviving reasonably well. For sure it's no Monarch 10EE or even Colchester, but it does decent work thanks to the DRO. We've never used the cross slide lock nor had a need for it. The gibs are adjusted to a "normal" level of no slop, but not much drag, either. To me, an Acu-rite or Fagor would be a waste on a Jet 1340. I have one of each DRO (plus an old Sony) in my shop. The Acu-rite sure is nice on a mill.
 

gr71

Plastic
Joined
Mar 30, 2015
Thanks for the input.

I actually like the Jet. It's a mid 90's model I've had since new. Some of the fasteners have been lackluster, but the spindle bearings have been quite impressive. The runout on the spindle is around a tenth.
 

guythatbrews

Cast Iron
Joined
Dec 14, 2017
Location
MO, USA
I used to run a great mori seiki engine lathe with a cross slide lock but seldom used it. Every once in a while yes.

Maybe a newall scale will fit around your lock. They are pretty diminutive and easier to install to it seems. Lots of talk about them here.

If you loose the lock and go optical I have several of the amazon types. Lots will pooh-pooh them but have had very good luck personally and lots of features. Much much more affordable. Less than $300 for 3 axis. Other than chinglish manual no problems at all.

Maybe you could cut the lock bolt down and make it a hex head. Mount the scale 1/8 away from the side of the cross slide. Make a thin wrench to reach the lock between cross slide and scale. Not as convenient as before but you'd have scale and lock too.
 

Terry Keeley

Stainless
Joined
Oct 18, 2005
Location
Toronto, Canada eh!
I volunteer in the local high school's robotics program and put a DRO Pros glass scale DRO on their Jet 1340. It's been fine for about 3 years now, with student use and abuse. My only complaint about the DRO Pros unit is that it shows diameter (X) to the 1/2-tenth, i.e., 0.00005, which is useless and mostly just flickers. I have not found a setting short of masking tape to make the last digit disappear. Even the lathe is surviving reasonably well. For sure it's no Monarch 10EE or even Colchester, but it does decent work thanks to the DRO. We've never used the cross slide lock nor had a need for it. The gibs are adjusted to a "normal" level of no slop, but not much drag, either. To me, an Acu-rite or Fagor would be a waste on a Jet 1340. I have one of each DRO (plus an old Sony) in my shop. The Acu-rite sure is nice on a mill.

Which display do you have? On my EL400 it's under Setup Mode (wrench symbol), display resolution (dP), set to 5.0.
 








 
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