Klicky Probe Accurcy

[JADoglio]

As always, I am never quite sure where to ask questions. So, if this is the wrong group, please point me in the right direction. I built a new klicky probe for my Voron 2.4 running Duet 3 Mini 5+ hardware and DWC 3.4.6. I bought cheap Chinese switches instead of the Omron (my mistake). The switches seem to be less accurate than the Omron I was using , as it seems to often take more probe attempts to get a good reading.

I did a probe repeatability and got these results;
M292 G32 bed probe heights: -0.090 -0.094 -0.094 -0.097 -0.097 -0.097 -0.090 -0.090 -0.094 -0.094 -0.094 -0.094 -0.092 -0.094 -0.094 -0.097 -0.099 -0.097 -0.094 -0.092 -0.090 -0.092 -0.096 -0.094 -0.097 -0.094 -0.092, mean -0.094, deviation from mean 0.003. These results seem pretty good to me, but if anyone can confirm that, or tell me what they should, be that would be appreciated.

[moth4017]

@JADoglio here are my results from an omron micro switch
G32 bed probe heights: 0.010 0.011 0.010 0.009 0.009 0.009 0.009 0.008 0.008 0.008, mean 0.009, deviation from mean 0.001

[JADoglio]

@moth4017 Thanks. That pretty well answers the question. I am buying an Omron and will start over. I suspect it will help.

[moth4017]

@JADoglio your values are good enough but buying the omron will most likely be more repeatable over time, mine is nearly 18months old and it gets used in a heated chamber too

[dc42]

@JADoglio what is the resolution of your Z axis? Have you tried reducing the probing speed?

[moth4017]

@dc42 speed makes a litle differance

[dc42]

@moth4017 have you configured the probe as type 5 or type 8 ? Type 8 is likely to be less sensitive to speed than type 5.

[moth4017]

@dc42 type 5

type 5 test
G32 bed probe heights: 0.022 0.028 0.019 0.022 0.032 0.030 0.027 0.026 0.032 0.030 0.024 0.025 0.026 0.020 0.027 0.022 0.026 0.024 0.019 0.023, mean 0.025, deviation from mean 0.004

type 8 test

G32 bed probe heights: 6.100 6.104 6.102 6.101 6.093 6.095 6.097 6.096 6.091 6.092 6.097 6.101 6.089 6.095 6.091 6.096 6.090 6.090 6.095 6.091, mean 6.095, deviation from mean 0.003

[oliof]

@moth4017 those are both excellent results?

[moth4017]

@oliof Thanks , it took a while to design the probe .
now just weeks of testing

VID_20240404_144948.mp4