Tomc938
Ultra Member
Mine came with no shims. I saw a picture online with the shim in place and tried to approximate the distance. Seems to measure correctly based on the marks on the crank.
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DRO Shaking
- Thread starter Tomc938
- Start date
Tomc938
Ultra Member
I was thinking along those lines. Still might. But it went together so well, I hate to mess with success. I'll see how things are going forward.
Tomc938
Ultra Member
Thanks to everyone for the assistance! Feel so much better now that I don't think I flushed money down the drain.
And if there are ongoing issues, I can work on the gibs again.
BTW: I was thinking about throwing a couple of sandbags into the base to help reduce vibration. Anyone have experience with that? Would also help quell the harmonics.
And if there are ongoing issues, I can work on the gibs again.
BTW: I was thinking about throwing a couple of sandbags into the base to help reduce vibration. Anyone have experience with that? Would also help quell the harmonics.
Wouldn't hurt but shouldn't be necessary. How bad is the vibration and where is it coming from?
Blouin55
Michel
Did you bought the base from King Canada?
Tomc938
Ultra Member
Yes. Pretty light-weight sheet metal.
Blouin55
Michel
This a reason i made my own, much heavier.
That's great news. As I made suggestions and asked questions I managed to depress myself thinking ahead to problems I might anticipate having along the same lines.
I even redesigned the x axis bracket I was planning to use to make it much more solid. I'll prolly still go with the stronger bracket but it's good to know that something as simple as tightening the Gibbs got rid of the digit dance.
Blouin55
Michel
Thats what i'm thinking about too..
When i'ii install mine, i will use a 1/4 in steel bracket.
Proxule
Ultra Member
Mine flickers from .0002 to .0004 in some situations, depending on where the head is ( rpm ) and what Fq the lathe is wiggling at. I am speaking of the Z axis here.
What's the Z axis on a lathe? I'll get 0.000X blips on my mill just by locking the table and/or running a dull endmill. If your DRO supports display filtering (shake) you can filter those out.
Blouin55
Michel
Attachments
I am adding a note on this thread because I just found another reason for flickering of the digits. Anyone reading this thread and looking for a solution to a similar problem might appreciate this additional info.
Apparently aligning the bar code on the scale and the bar code of the reader is important. If they are not aligned, the last set of digits are more likely to flicker.
I will also add this info to my earlier post so it shows up earlier in the thread.
Apparently aligning the bar code on the scale and the bar code of the reader is important. If they are not aligned, the last set of digits are more likely to flicker.
I will also add this info to my earlier post so it shows up earlier in the thread.
What's a code bar?
Well, it's more like bar code not code bar. It's the group of bars that are located at one end of the scale and on one side of the reader head. Apparently they must both be on the same side.
Tomc938
Ultra Member
I am able to remove most of the random flashing, even at start-up. I checked the belts, and I was running the mill at 1450 RPM, so a fair increase in speed.
I was able to shoot a video of the continual vibration I have. The "buzzing" sound is the plastic handle on the X-axis as it spins around in circles.
I haven't tried at other speeds yet to compare.
I did add some steel channel iron to the stand where the machine bolts to the stand. I could see deflection on the sheet metal where it was tightened. So the 2" x 1" iron is between the heads of the hold down bolts and the washer and nut that holds the machine down. The channel iron goes from front to back the entire length. (I hope this makes sense)
I am still getting the occasional flashing on the .00X in Imperial. I'm guessing the read head is right on the edge of the markings in those cases.
Also think I will beef up the strap that holds the read head.
Glass scale come with the reader pre-installed. Are magnetic scales different?
On the case of the DRO display is a screw for a ground. This is not the same as the ground in the wiring.
yes, on a mag scale the heads are not attached like on glass scales
Yes. On a magnetic system, the reader and scales are separate devices. The reader is placed against the scale and slides on its surface.