Piezo20 probe and piezo kit now available
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Wonderful feedback thank you.
If you dont mind I might it on the reprap forum which is our main support thread for others to view/learn from.Loving all the positives.
To address the bad bits
-Try reducing the sensitivity a little bit, using VR2 just turn it a tiny bit past the point where the triggered LED goes out. Try a few different probing speeds. Some get better performance at 240mm/min others as high as 420-480mm/min. You shouldn't be troubled by triggering during moves, unless something in the firmware isnt set up right as the firmware isnt looking for a Z-trigger during moves it should ignore it completely, only looking for it when probing (an extra LED comes on on the duet when a probing dive takes place, I believe this is the MOD signal which is the fourth, unused in most cases, pin in the z-probe connector.- My recommended nozzle clean is to heat bed to 1st layer temp, then nozzle to 130 deg C, this enables you to remove any residual plastic with side cutters. There should be no ooze at this temp. Any that remains should be compressible enough to not affect your second reading as it gets squashed out of the way on the first reading. You can setup the firmware to probe twice on a probing point (search for it on the forum here) and then use second reading?
-Check your bed is firmly attached and nothing is "wobbly" I'm sure its not but were only talking 0.1-0.2mm.
Will have some more in stock soon. Looking into way of getting PCB's in bigger numbers now, seems there is enough demand.
- My recommended nozzle clean is to heat bed to 1st layer temp, then nozzle to 130 deg C, this enables you to remove any residual plastic with side cutters. There should be no ooze at this temp. Any that remains should be compressible enough to not affect your second reading as it gets squashed out of the way on the first reading. You can setup the firmware to probe twice on a probing point (search for it on the forum here) and then use second reading?
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Thanks for the answer, I'm following the reprap thread too, so I can post it there too if you want to.
I'm doing the test with the nozzle at 120, although I think I will need to increase it, for PETG I think is too low. I will look for the 2 readings stuff, and play a bit more with the sensibility, I'm not worried about that, I've reduced the false triggering almost to zero.
Cheers!
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Has anyone switched from under bed FSR setup to under bed piezo?
If so was it a major improvement over the FSR setup? -
I'm a little biased but if you consider going from 50-100g of force to trigger with FSR's (I used to have them), to 10-15g with piezo, then it must be an improvement.
However when it comes to the best approach for a delta I would say fix the bed rigidly, use the hotend based piezo probe. The results speak for themselves, I get 0.007 deviation when auto-calibrating, and that's probing 64 points, to ensure it wasn't just a lucky result.
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any update on when the drop ins will be available?
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OK, Thanks. The under bed approach would be much easier but I have started to see some progress on Rostock Max V3 integration at the effector.
I'm a little biased but if you consider going from 50-100g of force to trigger with FSR's (I used to have them), to 10-15g with piezo, then it must be an improvement.
However when it comes to the best approach for a delta I would say fix the bed rigidly, use the hotend based piezo probe. The results speak for themselves, I get 0.007 deviation when auto-calibrating, and that's probing 64 points, to ensure it wasn't just a lucky result.
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any update on when the drop ins will be available?
Should have some PCB's this week and then I can list some on the site. I will post here but the main channel for announcing new stock is the thread on reprap under general.
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Finally got time to install the piezo probe on my selfmade I3 clone.
I must say I am impressed, it works really well.
Have on issue though, when I run mesh bed leveling the heightmap is like this:
someone has an idea what could be wrong?
these are my current parameters in config.g (running on 1.19b10):
M558 P5 I0 X0 Y0 Z1 H2 F150 T1500 R0.8 ;digital piezo sensor, output rises on contact, probing speed, used to home Z axis
G31 X0 Y0 Z-0.14 P150 ;sensor is nozzle and debounce value.
M557 X1:210 Y1:300 S40 ; Set probe gridheightmap.csv contents:
RepRapFirmware height map file v1 generated at 2017-06-20 12:03, mean error 0.138, deviation 0.315
xmin,xmax,ymin,ymax,radius,xspacing,yspacing,xnum,ynum
1.00,210.00,1.00,300.00,-1.00,40.00,40.00,6,8
0.110, 0.127, 0.165, 0.165, 0.147, 0.150
0.030, 0.075, 0.105, 0.085, 0.072, 0.028
-0.035, 0.002, 0.020, -0.017, -0.052, -0.070
-0.045, 0.005, 0.040, 0.000, -0.032, -0.075
-0.015, 0.008, 0.020, 0.000, -0.052, -0.097
0.040, 0.080, 0.123, 0.082, 0.062, 0.082
0.115, 0.203, 0.198, 0.168, 0.160, 0.080
0.265, 0.360, 0.428, 0.467, 0.467, 0.358 -
DWC hasn't been updated to support 1.19 beta 10 mesh leveling grid display
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DWC hasn't been updated to support 1.19 beta 10 mesh leveling grid display
That's weird, where did you get that info from?
It was showing a correct map when I was using the inductive probe? -
Go to bed centre and issue G30 (no parameters) this resets Z level, then do G29.
Also make sure you erase/change the G31 z offset in config_override.g as it overrides the value you set in config.g - this has got me multiple times!
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Go to bed centre and issue G30 (no parameters) this resets Z level, then do G29.
Also make sure you erase/change the G31 z offset in config_override.g as it overrides the value you set in config.g - this has got me multiple times!
this is basically what I am doing, I home Z before doing G29 (and I have no config_override.g).
My homez.g file:
G91
G1 Z5 F100
G90
G1 X100 Y150 F9000
G30small resume: probing/mesh bed leveling works and my heightmap looks ok when I look at the numbers, but the graphic is not ok in DWC.
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DWC hasn't been updated to support 1.19 beta 10 mesh leveling grid display
That's weird, where did you get that info from?
It was showing a correct map when I was using the inductive probe?I had the same problem with the height map and here's David's response
https://www.duet3d.com/forum/thread.php?pid=19176#p19176 -
Thanks, missed that bit
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New Piezo Z-Probe Stock available see thread http://forums.reprap.org/read.php?1,767998,779243,page=11
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Thanks DJ! I ordered it right away.
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Thanks for the order, I'll get on with making it.
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Just ordered thank you!!
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Many thanks.
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DWC hasn't been updated to support 1.19 beta 10 mesh leveling grid display
Chrishamm released 1.17+2 that fixes this problem…
