Testing Resolution / accuracy , Your results wanted! Z Probe Results

[Sabagmn]

@DjDemonD:

I like that idea that's very similar to Nebbian's deployable delta probe http://www.thingiverse.com/thing:1517363 except he just uses an optical endstop so saving himself £25.

The original design I based this on also used an optical endstop. But I already had the IR sensor, so I figured I may as well use it. Especially too since I can run it in analog mode.

[DjDemonD]

I also like the fact that Nebbian's probe deploys by servo but isn't positioned by the servo, and it deploys below the nozzle avoiding offsets and tilt problems.

[Yonkiman]

Here are the results from my Voron CoreXY which uses a "small white and black micro switch with the label TIAIHUA" as the nozzle-contact Z switch:

36 points moving

Bed probe heights: 0.053 0.060 0.062 0.062 0.062 0.060 0.062 0.060 0.060 0.058 0.055 0.053 0.055 0.055 0.055 0.055 0.055 0.055 0.055 0.058 0.058 0.060 0.058 0.058 0.062, mean 0.058, deviation from mean 0.003

Bed probe heights: 0.070 0.065 0.062 0.067 0.065 0.065 0.062 0.065 0.067 0.067 0.067 0.070 0.065 0.070 0.067 0.070 0.070 0.070 0.067 0.073 0.073 0.070 0.073 0.075 0.073, mean 0.068, deviation from mean 0.003

Single Point Static

Bed probe heights: 0.028 0.037 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.037 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040, mean 0.040, deviation from mean 0.002

Bed probe heights: 0.040 0.050 0.053 0.053 0.053 0.053 0.053 0.053 0.053 0.053 0.050 0.053 0.050 0.050 0.050 0.050 0.053 0.053 0.053 0.050 0.053 0.053 0.053 0.053 0.050 0.053 0.050 0.050 0.050 0.050 0.050 0.050 0.050 0.050 0.050 0.050, mean 0.051, deviation from mean 0.002

Was interesting to see the results plotted:

Seems to need a few attempts before it "warms up" and becomes very repeatable.

[Sabagmn]

I hooked up my servo controlled switch for comparison to my IR setup and here are the results:

Static
21:17:00
Bed probe heights: -0.005 -0.012 -0.015 -0.015 -0.018 -0.017 -0.021 -0.022 -0.022 -0.024 -0.024 -0.024 -0.026 -0.026 -0.025 -0.026 -0.027 -0.026 -0.026 -0.027 -0.027 -0.027 -0.028 -0.027 -0.027 -0.027 -0.027 -0.026 -0.028 -0.024 -0.028 -0.026 -0.028 -0.028 -0.026 -0.028, mean -0.024, deviation from mean 0.005
21:21:50
Bed probe heights: -0.015 -0.019 -0.018 -0.021 -0.018 -0.021 -0.021 -0.022 -0.022 -0.022 -0.022 -0.022 -0.022 -0.020 -0.021 -0.019 -0.020 -0.022 -0.023 -0.020 -0.023 -0.023 -0.023 -0.023 -0.023 -0.023 -0.023 -0.023 -0.023 -0.024 -0.024 -0.023 -0.023 -0.023 -0.018 -0.023, mean -0.021, deviation from mean 0.002

Moving
21:36:20
Bed probe heights: -0.054 -0.054 -0.051 -0.048 -0.038 -0.053 -0.046 -0.056 -0.058 -0.053 -0.051 -0.061 -0.059 -0.052 -0.054 -0.051 -0.053 -0.046 -0.055 -0.052 -0.059 -0.062 -0.058 -0.050 -0.053, mean -0.053, deviation from mean 0.005
21:45:09
Bed probe heights: -0.044 -0.054 -0.050 -0.041 -0.051 -0.049 -0.049 -0.045 -0.048 -0.049 -0.049 -0.048 -0.045 -0.048 -0.055 -0.047 -0.043 -0.047 -0.043 -0.043 -0.048 -0.049 -0.040 -0.038 -0.043, mean -0.047, deviation from mean 0.004

This setup and switch: https://youtu.be/o2jY9fycSa0
http://photos.gerbers.us/FullScreenSlideShow.aspx?gallery=4808439&mt=Photo

[Russ Gries]

@Yonkiman:

Here are the results from my Voron CoreXY which uses a "small white and black micro switch with the label TIAIHUA" as the nozzle-contact Z switch:

Seems to need a few attempts before it "warms up" and becomes very repeatable.

great results, it basically matches my other micro switches, that means your rig is quite solid and the way its build works good.

do you have some photos / information on how its set up? i would lie to see how its built.

Thanks for your results!

~Russ

[Russ Gries]

@Sabagmn:

I hooked up my servo controlled switch for comparison to my IR setup and here are the results:

interesting, its a bit more sloppy. but very close. still way good i think…

i would like to see you do a contact contact test... see if you can pull off a perfect score...
Or if you have some slop in that Cartesian...

here are the results of both the last 2 entry's.

any other takers... please post results.
the more data i ( we) have the better idea we have of types of probes... and printers. + errors

your data added to the workbook.

Higher rez http://open-source-energy.org/rwg42985/russ/Projects/3D%20printer/micro%20switch%20Z%20probe%20Data/Bed%20Probes%20accuracy%20others%20added.jpg

by the way if you guys look at the spreed sheet there is plots for each run like Yonkiman posted….

and it is interesting so see the plot.

i have also seen where the first probe or 2 is off but then flat lines , kinda interesting.

~Russ

[h]MORE TESTING PLEASE [/h]

[leadinglights]

I would like to be able to contribute some data for under-bed piezo sensors but unfortunately the cost of the Duet3D prevents me from doing so at the moment. I suspect from oscilloscope and logic analyzer traces that it is at least in the 1 micron region but Arduino/Ramps/Repetier firmware only reports to 0.01mm. Of course, if anybody knows how I can coax Repetier firmware to report G30 either to 0.001mm or in raw Z stepper steps I may be able to give you the data

Mike

[Russ Gries]

if you can, just run the test any way. post the numbers. if there all flat lined then your under your liniment of the Repetier… but that's ok. because if your way out we will see that too

Thanks!!

do you have some links / photos of the bed with Piezo's?

~Russ

[AndreS]

Hi Russ, some more data for you:

My machine:
Basically a Think3dPrint3D mini Kossel.
4mm aluminium heated bed + 4mm glas with Filaprint sheet.
20T pulleys, 1,8 deg stepper.
3 FSR sensors under the bed connected to 3 ADC on ATmega8. I created circuit and program myself (no Arduino).
Homing switches are Hall-sensors.
Flying extruder with counterweight.

Bed cold, Nozzle 140C cleaned.

17:32:09
M98 P0:/macros/Test/Probe_Testing_Single_Point_36_probes_P_values.gcode
Bed probe heights: 0.003 0.016 0.003 0.003 0.003 0.003 0.016 0.016 0.003 0.003 0.003 0.003 0.003 0.016 0.016 0.003 0.003 0.003 0.003 0.003 0.003 0.016 0.016 0.003 0.003 0.003 0.003 0.003 0.003 0.016 0.016 0.003 0.003 0.003 0.003 0.003, mean 0.006, deviation from mean 0.005

17:35:34
M98 P0:/macros/Test/Probe_Testing_Single_Point_36_probes_P_values.gcode
Bed probe heights: 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.016 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003, mean 0.003, deviation from mean 0.002

17:38:41
Another run after homing. Homing switches are hall-sensors.
M98 P0:/macros/Test/Probe_Testing_Single_Point_36_probes_P_values.gcode
Bed probe heights: -0.009 -0.009 -0.009 0.003 0.003 0.003 0.003 -0.009 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 -0.009 0.003 -0.009 0.003 -0.009, mean 0.001, deviation from mean 0.005

17:44:40
M98 P0:/macros/Test/Probe_Testing_moving_100-100_probe_0-0_25_Point_p_values_.gcode
Bed probe heights: -0.009 0.003 0.016 0.003 0.003 0.003 0.016 0.003 0.028 0.028 0.003 0.003 0.028 0.028 0.016 0.016 0.003 0.003 0.028 0.003 0.003 0.003 0.016 0.016 0.028, mean 0.012, deviation from mean 0.011

17:49:33
M98 P0:/macros/Test/Probe_Testing_moving_100-100_probe_0-0_25_Point_p_values_.gcode
Bed probe heights: 0.016 0.028 0.016 0.016 0.016 0.016 0.028 0.016 0.003 0.003 0.016 0.016 0.003 0.016 0.016 0.028 0.028 0.016 0.028 0.016 0.003 0.016 0.016 0.028 0.016, mean 0.017, deviation from mean 0.008

17:56:37
Again another run after homing.
M98 P0:/macros/Test/Probe_Testing_moving_100-100_probe_0-0_25_Point_p_values_.gcode
Bed probe heights: 0.003 0.003 0.028 0.016 0.003 0.016 0.016 0.028 0.016 0.028 0.016 0.028 0.028 0.016 0.028 0.016 0.028 0.028 0.016 0.028 0.016 0.028 0.016 0.028 0.016, mean 0.020, deviation from mean 0.008

Andre

[DjDemonD]

Couple of fresh results.

These are with a 20mm "Piezo20" module I am hoping to be able to sell soon, on a kossel XL.

This is the moving head test
Bed probe heights: -0.004 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.006 0.001 0.006 0.006 0.006 0.001 0.001 0.001 0.006 0.001 0.006 0.001 0.006 0.006 0.006 0.001, mean 0.003, deviation from mean 0.003

This is the stationary probing test:
Bed probe heights: 0.001 0.001 0.001 0.001 0.001 0.001 0.001 -0.004 -0.004 -0.004 0.001 0.001 -0.004 -0.009 -0.009 -0.009 -0.009 -0.004 -0.009 -0.009 -0.004 -0.004 -0.004 0.001 -0.004 0.001 -0.004 -0.004 -0.004 -0.004 -0.004 -0.004 -0.004 -0.004 -0.004 -0.004, mean -0.003, deviation from mean 0.003

[dc42]

Here are the results for the prototype version #2 of the Duet3D delta effector with built-in nozzle contact probe, on my Kossel

Stationary test:
Bed probe heights: 0.005 -0.003 0.007 0.004 0.003 -0.003 0.003 0.004 0.004 0.002 0.004 0.002 0.002 0.003 0.004 0.002 0.003 0.005 0.003 0.005 -0.005 0.003 0.003 0.002 -0.002 0.003 0.003 0.003 0.002 0.002 0.003 0.003 0.002 0.002 -0.006 -0.003, mean 0.002, deviation from mean 0.003

Moving test:
Bed probe heights: 0.008 0.004 0.003 0.008 0.003 0.004 0.005 0.015 0.011 0.004 0.005 0.003 0.002 0.004 0.002 0.000 -0.002 0.002 0.003 -0.001 -0.001 0.007 0.008 0.003 0.009, mean 0.004, deviation from mean 0.004

I used 64x microstepping for this test which on this machine gives a theoretical Z resolution of 0.00125mm, although in practice the machine doesn't move on individual 1/64 microsteps.

[Sabagmn]

Just bought one of those from your early bird special.
Looking forward to trying it.
Planning on using that on a Hypercube Evolution that I am in the process of building.
Thanks for putting in the time and effort needed to develop such a product, and still making it easily available to everyone!

Sandro

@DjDemonD:

Couple of fresh results.

These are with a 20mm "Piezo20" module I am hoping to be able to sell soon, on a kossel XL.

This is the moving head test
Bed probe heights: -0.004 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.006 0.001 0.006 0.006 0.006 0.001 0.001 0.001 0.006 0.001 0.006 0.001 0.006 0.006 0.006 0.001, mean 0.003, deviation from mean 0.003

This is the stationary probing test:
Bed probe heights: 0.001 0.001 0.001 0.001 0.001 0.001 0.001 -0.004 -0.004 -0.004 0.001 0.001 -0.004 -0.009 -0.009 -0.009 -0.009 -0.004 -0.009 -0.009 -0.004 -0.004 -0.004 0.001 -0.004 0.001 -0.004 -0.004 -0.004 -0.004 -0.004 -0.004 -0.004 -0.004 -0.004 -0.004, mean -0.003, deviation from mean 0.003

[jrlederer]

@leadinglights:

I would like to be able to contribute some data for under-bed piezo sensors but unfortunately the cost of the Duet3D prevents me from doing so at the moment. I suspect from oscilloscope and logic analyzer traces that it is at least in the 1 micron region but Arduino/Ramps/Repetier firmware only reports to 0.01mm. Of course, if anybody knows how I can coax Repetier firmware to report G30 either to 0.001mm or in raw Z stepper steps I may be able to give you the data

Mike

Mike,
I've been in the giving mood lately, and similarly to how I hooked up DJDemon's with a diet wifi, I am inclined to gift one to you as well as a personal thank you for all the contributing you do toward this hobby. Shoot me your address and I'll replace the vssa fuse on one of the other 3 boards I'd accidentally fried over the months and didn't know the fuse was replaceable. LoL. Anyway, what I'm gonna do with 4 Duet Wifi boards? ?

[BlackTom]

@Sabagmn:

Just bought one of those from your early bird special.
Looking forward to trying it.
Planning on using that on a Hypercube Evolution that I am in the process of building.
Thanks for putting in the time and effort needed to develop such a product, and still making it easily available to everyone!

Sandro

@DjDemonD:

Couple of fresh results.

These are with a 20mm "Piezo20" module I am hoping to be able to sell soon, on a kossel XL.

This is the moving head test
Bed probe heights: -0.004 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.006 0.001 0.006 0.006 0.006 0.001 0.001 0.001 0.006 0.001 0.006 0.001 0.006 0.006 0.006 0.001, mean 0.003, deviation from mean 0.003

This is the stationary probing test:
Bed probe heights: 0.001 0.001 0.001 0.001 0.001 0.001 0.001 -0.004 -0.004 -0.004 0.001 0.001 -0.004 -0.009 -0.009 -0.009 -0.009 -0.004 -0.009 -0.009 -0.004 -0.004 -0.004 0.001 -0.004 0.001 -0.004 -0.004 -0.004 -0.004 -0.004 -0.004 -0.004 -0.004 -0.004 -0.004, mean -0.003, deviation from mean 0.003

Same here… I'll install it on my custom coreXY... I hope to get it soon

[DjDemonD]

I'm just hoping the modules will live up to expectations, have quite a few orders now, so give me a few days guys to make them. But thank you for your support.

[DjDemonD]

Hi Russ, any chance of an update of the graphs with the latest results?

[Russ Gries]

will do, its been on my list of To Do's . lots of excitement lately with the release of the QSN. (if you haven't see that let me know, i haven't posted it here because its not directly Duet related… but soon ill be!)
so i haven't had time to work on this project so sorry for my lack of attendance one day at a time.

let me this new data now!

Thanks for all who have added!!

~Russ

[Dougal1957]

Not heard of that Russ please do post the links?

[Russ Gries]

DjDemonD and dc42

can you run the test 2 times ( please post one more run of each. I need more data to do the equally with the rest of the data!)

also David, can you run the IR probe you have built, do you have it installed on something you can test? that one is a real mystery still know one has given data on it anywhere! Thanks!

Jrlederer,
That was kind of you to gift a Bord!
Can I ask you to trade an old version 0.8.5 for a Duet Wifi? I have a good never used ( was for a project that i haven't finished yet) 0.8.5 that i did some testing with. then i upgraded that new Delta to a duet wifi. I would just sell it and get a Duet Wifi but no funds for that…
( hey mamma always said its never a bad idea to ask)

and for some reason you say yes but dont want the 0.8.5 ill do a give a give away on my YT channel.. ( sponcerd by you )

ok.

Here is the data from AndreS
still waiting on he second run from you other guys! ( please)

your data added to the workbook.

Higher rezhttp://open-source-energy.org/rwg42985/russ/Projects/3D%20printer/micro%20switch%20Z%20probe%20Data/Bed%20Probes%20accuracy%20others%20added.jpg

looking for more! I want to make a video on this some time so if there are more users why haven't contributed please do so soon!
Thanks!!!

[Russ Gries]

@Dougal1957:

Not heard of that Russ please do post the links?

ok i posted it here so we dont mess up this thread
https://www.duet3d.com/forum/thread.php?pid=15107
~Russ