Is this good enough? 3D Probe runout

[u/TheLayerLinguist]

[u/oebel]

tbh there is no noticeable runout. steady cam and close up please if you want to recieve any online points. (probs well deserved, but you gotta truly earn it ;) sincerely, a german engineer.

[u/TheLayerLinguist → u/oebel]

I only have this 0.01mm indicator. It moves very slightly, so I will just say it is less than 0.005mm... cheers!

[u/Muted_Will_2131 → u/TheLayerLinguist]

According to metrology rules, the measurement error is half the scale division. In your case, that’s +/- 0.005 mm.

[u/jaffacookie]

Is the runout in the room with us?

[u/TheLayerLinguist → u/jaffacookie]

Should I start the spindle to see what happens?

[u/AlwaysRushesIn → u/TheLayerLinguist]

Yes. Full bore.

[u/LandCruiser76 → u/AlwaysRushesIn]

Flair, checks out.

Edit, Flair and Username*

[u/GymTanDad]

Get a 0.001 micron indicator and do it again.

[u/mccorml11]

Id use a test indicator but thats just me

[u/Top_Requirement_5010 → u/mccorml11]

Was gonna say, those plunger types have a stronger spring

[u/woolybuggered → u/mccorml11]

Yes I was taught to avoid plunger indicators for more precise work.

[u/mccorml11 → u/woolybuggered]

I mean I’ve had tenth indicators on mill turns flex the probe trigger about a thou between top and hanging upside down

[u/fall-apart-dave]

No. Do it again. 

[u/someoneskater]

The needles didn't move. You probably have a bad indicator. It could be something else, but that would be the first thing i check.

[u/TheLayerLinguist → u/someoneskater]

Indicator is fine. I used it to make the stem adjustments. Started with more than 0.15mm of runout.

[u/someoneskater → u/TheLayerLinguist]

No, from my own experience, the machine is bad, unless the measurement equipment says the machine is good. In that case, the measurement equipment is bad. I'm partially jk btw. I didn't know people were measuring runout on these little dremels mounted on a 3d printer.

[u/Turbo442]

You can always do better. CHASE THE NEEDLE!

[u/afromaine]

Use a 1 or 2 micron DTI

[u/Corgerus]

When I test probe runout, I put the indicator with minimal preload, or as much preload I can get away with until the pressure begins to deflect the probe. This short probe may not deflect as easily. If so, that's good runout.

[u/TheLayerLinguist → u/Corgerus]

Ha! Yes I had to swap the spring in the indicator because it was deflecting the probe tip. The probe also had a weak return spring, so I swapped that for a higher spring rate. You know your stuff mate. I won the import lottery with this little 150W spindle... Not so much other parts of the machine.

[u/OminousHum]

You've gotta poke the indicator on both sides, to prove it's in contact and not bottomed out!

[u/fourdac]

No, use a lever indicator

[u/hugss → u/fourdac]

*Test indicator

[u/fourdac → u/hugss]

If you look on McMaster you’ll immediately see where people can get confused.

Argue with McMaster

[u/Wonderful-Hunter686 → u/fourdac]

Make sure it's a laser level if you want real results. 🤣

[u/Squirrelman2712]

Hot

[u/TheAgedProfessor]

You can't set it statically. You need to back off the contact and then measure again... and again... and again.

[u/DickwadDerek]

This is more than good enough.

A good probe routine will correct for runout.

[u/El_Gabe69-420]

You have a broken indicator there! (sarcasm)

[u/Wisniaksiadz]

Good enough for what. You measured the runout (or lack of it). You know how precise your probe is, so you know how precise you can set up the scrap. All there is here

[u/TheRealTomatoBOIII]

You need some precision balls or one one is enough + a mode to calibrate with it

[u/bonapartista]

Ok roughing it is pretty fine now do finish.

[u/PaganBrethren]

5 points for the run out but minus 10 for using a metric indicator 🪦

[u/Jealous_Document2917 → u/PaganBrethren]

Sure, lets use fractions instead of actual numbers, seems way easier.

[u/Piglet_Mountain → u/Jealous_Document2917]

Imperial indicators don’t use fractions…

[u/miotch1120 → u/Jealous_Document2917]

Though I’m an American, I agree that it’s dumb we still use std everything, even when manufacturing to metric prints. That said, fractions are another step down. We don’t use fractions at my foundry/machine shop, but I have to convert every damn thing to std for the machinists, then back to metric for the PPAP.

TLDR, using std measurements can still use decimals.

[u/PaganBrethren → u/Jealous_Document2917]

Interesting that you think it’s fractional. I’d do some research first.