PM-935TS DRO Install

Just for fun

Tim Young
H-M Lifetime Diamond Member
Joined
Oct 7, 2020
Messages
2,335
Nothing fancy but here is my DRO install. The X access went without a hitch, the Y access I had to redue it and it should really be modified one more time. The Z access has really been a pain but I am getting close.

Setting up the X access.

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I machined a little notch in the chip cover, much nicer than using a grinder. LOL

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The Y access:

I had removed the X access power feed to gain access to the side of the machine. I had everything for the DRO mounted I was just getting started on the power feed stop when it dawned on me that all the mounting brackets are probably going to interfere with the power feed. Sure enough I was loosing probably 2" or more of travel. These photos are after I rearranged the brackets, loosing maybe 1.25" of travel. It could still be improved but I'm leaving it as is until it becomes a problem.

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I made this little bracket to mount the Y access power feed stop switch to.

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And since I flipped the switch over I had to reverse the internal switches.

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Here is how close the power feed comes to the DRO bracket, the power feed stops a little before that, this is hand cranked until full stop.

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The Z access:

At this point I am still trying to get the scales to run true to the machine. I have maybe 3 hours into this and still not quite where I would like it. I did machine a couple of spacers for the install. One for the bottom of the scale and one for the read head that if all goes as planned I should be installing tomorrow.

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I know it's not much but this is the one of the first times running a mill so that in it's self was pretty cool, and so much nicer the using a grinder to smooth out the spacer. I cut the spacer out of a piece of aluminum angle.

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Looking good so far! Good catch on the mounting bracket interfering with the power feed. Nice to see the way oil dripping down the sides of the Y axis. I probably keep my mill lubed more than it has to be but it's peace of mind. You're going to love learning everything about running a milling machine. A mill has always been my favorite to run in the shop.
 
I had some time today and finished up the Z access DRO install. I don't really care for looks of the install but it is functional.

I made a couple little clamps and supported the Z access scales in the middle. That solved the issue I was having trying to get it lined up.

Now to get the wires under control.

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Oh and one more thing, the spacer I made the extends the mount on the knee. I ended up installing two grub screws so I could get a perfect alignment of the read head to the scale.

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That spacer was placed under this bracket.

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Is this the MAGXACT MX-200M MAGNETIC 3 AXIS MILL DRO from Precision Matthews?
 
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