Testing Resolution / accuracy , Your results wanted! Z Probe Results
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My printer is partially dismantled to find the source of the grinding sound, and to do some work on my piezo probe setup. Once I find the time to work on it again I'll try and run your tests.
cool thanks ! I hope you find your problem!.
~Russ
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Okay sorry I will make a new thread about endstops, this isnt really the right place.
I have a DC42 IR sensor, and would be happy to (maybe this is controversial given my pushing piezo tech) run it through your test gcodes. However I would be willing to suggest having used it extensively before going to piezo, that if the bed is clean and evenly reflective it will perform very well but given a bit of ABS glue/hairspray etc it will perform far less impressively. The issue with all of this testing is its between lab testing and the real world, the lab testing for microswitches and IR sensors shows/will show amazing results but how well do they repeat this performance when printing object after object in the real world that's what I'm interested in, and thats what I am so pleased with the piezo approach, in the real world once they are setup they perform amazingly well and keep on doing so, plus they nozzle based so no offsets to be compensated for, no tilt etc….
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Here are my results with a modified design of DC42's IR probe. Pretty happy with the results. With this design I don't have to worry about my print bed, which it doesn't do well on directly (glass/PEI).
17:12:51
Bed probe heights: 0.012 0.012 0.006 0.008 0.011 0.011 0.010 0.012 0.015 0.010 0.015 0.014 0.013 0.014 0.011 0.013 0.012 0.017 0.017 0.016 0.018 0.019 0.014 0.019 0.019 0.018 0.016 0.018 0.014 0.015 0.015 0.018 0.019 0.015 0.017 0.019, mean 0.014, deviation from mean 0.003
17:16:28
Bed probe heights: 0.015 0.021 0.013 0.018 0.019 0.016 0.017 0.018 0.015 0.013 0.015 0.018 0.015 0.017 0.014 0.021 0.018 0.019 0.015 0.020 0.017 0.016 0.017 0.014 0.019 0.014 0.016 0.016 0.018 0.020 0.015 0.018 0.016 0.018 0.015 0.020, mean 0.017, deviation from mean 0.00217:30:00
Bed probe heights: 0.011 0.023 0.025 0.015 0.011 0.014 0.014 0.020 0.009 0.012 0.013 0.019 0.019 0.019 0.024 0.016 0.012 0.013 0.017 0.005 0.008 0.020 0.015 0.021 0.012, mean 0.015, deviation from mean 0.005
17:36:01
Bed probe heights: 0.013 0.020 0.012 0.010 0.017 0.024 0.010 0.014 0.012 0.013 0.018 0.012 0.006 0.024 0.019 0.008 0.011 0.012 0.008 0.012 0.013 0.018 0.015 0.012 0.015, mean 0.014, deviation from mean 0.005This is the setup: http://photos.gerbers.us/FullScreenSlideShow.aspx?gallery=4808337&mt=Photo
Don't mind all the other stuff. Currently testing out different options for the Z probe, lol
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Here are my results with a modified design of DC42's IR probe. Pretty happy with the results. With this design I don't have to worry about my print bed, which it doesn't do well on directly (glass/PEI).
This is the setup: http://photos.gerbers.us/FullScreenSlideShow.aspx?gallery=4808337&mt=Photo
Don't mind all the other stuff. Currently testing out different options for the Z probe, lol
nice work. that basically just like hall-effect but your is better, Due to the way the rod is held in place. mine is a bit sloppy. you like like you have the proper slide guides in there..
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.jpgwhat steps are you using? and what Duet board? yours looks like a Cartesian correct?
Thanks for Probing!!!
~Russ
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You're welcome.
I use the Duet WiFi with 16 micro steps and 256 steps interpolation. And yes it's a cartesian.
Also that slide guide is just a repurposed ball bearing. Works well enough though. -
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.
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in case you guys did not watch my other video here is what i'm using now. but i have some intresting ideas to play wth with this type of rig…
OLD VIDEO
https://www.youtube.com/watch?v=80qzmwDFGVcPS. waiting for it to go live… http://www.thingiverse.com/thing:2260909
~RUSS -
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.
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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.
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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.
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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 0.002Moving
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 0.004This setup and switch: https://youtu.be/o2jY9fycSa0
http://photos.gerbers.us/FullScreenSlideShow.aspx?gallery=4808439&mt=Photo -
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
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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. + errorsyour 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.jpgby 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
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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
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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
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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 0.00517:35:34
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 0.00217:38:41
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 0.00517:44:40
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 0.01117:49:33
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 0.00817:56:37
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 0.008Andre
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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 0.003This 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 -
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 0.003Moving 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 0.004I 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.
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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
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 0.003This 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 -
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? ?
