BLTouch not really working
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@modl said in BLTouch not really working:
G1 H1 Z-360 F1800 ; move Z down until the endstop is triggered
you should be using
G30
to probe with a probe rather thanG1 H1 Z...
make sure you move the hotend to where you want to probe using G1 X Y before you use G30You don't need the M574 Z1 S2 line
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@modl said in BLTouch not really working:
But after that, in instruction 7 of "Calibrate the Z probe trigger height", G30 S-1 returns an error "Error: Probe already triggered at start of probing move".
Is the pin too close to the bed to deploy when that happens?
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@jay_s_uk Ok I tried that and the sequence starts BUT the BLTouch doesn't deploy.
I tried a few things with M401 and M402: they work when starting up the printer, but not after homing x and y.
I tried to do a Z homing with the bltouch initially deployed and the probing stopped as expected when BLTouch was triggered by the bed -
@modl you need to work out why M401 and M402 don't work then.
Do you have a deployprobe.g and retractprobe.g in sys? -
@jay_s_uk Yes they say M280 P0 S90 ; retract BLTouch and M280 P0 S10 ; deploy BLTouch
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@modl so does using M401 and M402 by themselves work every time?
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I tried reverting from RFF3.4.5 to 3.4.4 following the advice in the release notes because of some potential homing issues. It didn't solve the issue
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@jay_s_uk They work every time at startup, but not after homing x and y
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@modl that indicates that you either have a wiring issue or you have something in your homing files thats causing issues.
can you post homex.g and homey.g? -
@jay_s_uk So M401 and 402 actually work after homing x alone.
; homex.g ; called to home the X axis ; ; generated by RepRapFirmware Configuration Tool v3.3.15 on Mon Jan 09 2023 14:50:13 GMT+0100 (Central European Standard Time) G91 ; relative positioning G1 H2 Z5 F6000 ; lift Z relative to current position G1 H1 X-360 F1800 ; move quickly to X axis endstop and stop there (first pass) G1 H2 X5 F6000 ; go back a few mm G1 H1 X-360 F360 ; move slowly to X axis endstop once more (second pass) G1 H2 Z-5 F6000 ; lower Z again G90 ; absolute positioning
; homey.g ; called to home the Y axis ; ; generated by RepRapFirmware Configuration Tool v3.3.15 on Mon Jan 09 2023 14:50:13 GMT+0100 (Central European Standard Time) G91 ; relative positioning G1 H2 Z5 F6000 ; lift Z relative to current position G1 H1 Y-1000 F1800 ; move quickly to Y axis endstop and stop there (first pass) G1 H2 Y5 F6000 ; go back a few mm G1 H1 Y-1000 F360 ; move slowly to Y axis endstop once more (second pass) G1 H2 Z-5 F6000 ; lower Z again G90 ; absolute positioning
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@modl so theres nothing in there that should stop M401 and M402 from working.
next is to look at your wiring and make sure nothing is being pulled etc -
Ok M401 and M402 don't work after homing y alone, could there be a short somewhere with y endstops or motors ? Or could an overload cause this?
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@jay_s_uk Physically everything looks fine. And if i'm resetting the system, M401 and M402 will work at the exact same position
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@modl can you home Y and then send
M558
and post the output? -
@jay_s_uk
At startupM558 Z Probe 0: type 9, input pin io4.in, output pin nil, dive height 5.0mm, probe speeds 120,120mm/min, travel speed 6000mm/min, recovery time 0.20 sec, heaters normal, max taps 1, max diff 0.03
After homing Y
M558 Z Probe 0: type 9, input pin io4.in, output pin nil, dive height 5.0mm, probe speeds 120,120mm/min, travel speed 6000mm/min, recovery time 0.20 sec, heaters normal, max taps 1, max diff 0.03
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@jay_s_uk I found the culprit !! I actually had an extruder wired the wrong way when i first powered the machine, I rewired it as soon as i found out but it's been getting really hot even if idle since then. I unplugged it from the board and the probing now works. How to know if the stepper is cooked ?
Thank you very much for all your replies and your guidance
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Hope i didn't cook the driver...
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@modl glad you found the culprit! if it gets very hot even when not in use thats not a very good sign at all. is RRF generating any warnings?
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@jay_s_uk No RRF doesn't ring. I tested the coils resistance though one is .4 ohms the other is 4.8. I guess this one's cooked. Any way to know how the driver is doing except plugging in an other axis an changing config.g?