Before i blow my board . 3d touch help
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my duet wifi is a version 1.03, ive just got a 3d touch, but there is no trace to cut for 3.3v logic, it came with a 10k resistor though, I'm unclear on how to wire it up
any help would be grateful thanks
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Are you sure that it is a 10K resistor? Older versions of BLTouch came with a 240 ohm resistor, which you connect in parallel with the output to reduce the output voltage to 3.3V.
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Thanks for the reply. yes, it's def a 10k, shall i put a 240 ohm on the black wire ? next to white ,
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Can you post a picture of the probe PCB and any documentation you got with it?
There are so many clones and versions out there now that it's hard to keep track.
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thanks
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The plastic guard on the back hides what I want to see.
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1 min i will unscrew
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Definitely looks like an older style probe.
Did it include any instructions on where it suggests you use the resistor?
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came with no paperwork :{
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does the 240 ohm sit on the black wire ?
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From what I can tell from googling this is it maybe? http://www.geeetech.com/wiki/index.php/3DTouch_Auto_Leveling_Sensor#Electrical
It definitely says it comes with a 10k resistor, but the instructions don't mention anything about it and only over connecting to ramps.
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i think its to connect a led to the white black wire for debugging
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From the Duet BLTouch documentation:
https://duet3d.dozuki.com/Wiki/Connecting_a_Z_probe#Section_BLTouch
For all Duet 2 WiFi/Ethernet boards prior to version 1.04
If you have the older BLTouch, also connect the 240 ohm resistor between Probe GND and Probe IN. On the newer BLTouch, cut the PCB trace on the BLTouch to reduce the output to 3.3V as described in the BLTouch instructions.The Z probe input on the Duet 2 Maestro and Duet 2 WiFi/Ethernet rev 1.04 and later is 30V tolerant, so it doesn't matter whether you reduce the output of the BLTouch to 3.3V or leave it at 5V.
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like this ?
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That looks correct.
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@phaedrux ok thanks for your help :}
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Hi @richard-f did it work with 10K resistor? and did you connect it between black and white wire?
