Inconsistent Leveling/Probing Error

General LulzBot TAZ
1

Hey everyone,
I have a TAZ 6 on which I am using the 0.5mm nozzle and 3mm ABS, on a GeckoTek bed. I recently adjusted the leveling of the hot ends as the second nozzle kept hitting material printed by the first, but now my probing keeps failing.

Sometimes, it will probe properly and start printing, but I have to stop it because the Z-offset is too little. Most of the time, it gets to the front right corner, touches it, then goes to wipe. After 3 tries of this, it beeps and gives up.

I’ve tried both loosening and tightening the corner piece, to no avail. Also, if it gets past this corner it has no problems with any others. This is the only corner holding it up.

More details:
Using OctoPrint with a Pi 3 and slicing with Simplify3D (however I don’t think this is a GCode issue)

Thanks in advance for your help!

OCTOPRINT TERMINAL CODE

Send: N8 M203 X300 Y300 Z5 E463
Recv: ok N8 P15 B4
Send: N9 G2826
Recv: echo:Active Extruder: 0
Recv: T:230.47 /240.00 B:80.00 /80.00 T0:230.47 /240.00 T1:34.16 /0.00 @:127 B@:47 @0:127 @1:0
Recv: T:231.33 /240.00 B:80.00 /80.00 T0:231.33 /240.00 T1:34.25 /0.00 @:127 B@:47 @0:127 @1:0
Recv: T:231.56 /240.00 B:80.00 /80.00 T0:231.56 /240.00 T1:34.44 /0.00 @:127 B@:47 @0:127 @1:0
Recv: T:232.66 /240.00 B:80.00 /80.00 T0:232.66 /240.00 T1:34.48 /0.00 @:124 B@:47 @0:124 @1:0
Recv: T:233.05 /240.00 B:80.00 /80.00 T0:233.05 /240.00 T1:34.70 /0.00 @:127 B@:47 @0:127 @1:0
Recv: T:233.44 /240.00 B:80.00 /80.00 T0:233.44 /240.00 T1:34.81 /0.00 @:127 B@:47 @0:127 @1:0
Recv: echo:Active Extruder: 0
Recv: X:-19.00 Y:258.00 Z:10.00 E:0.00 Count X:-1910 Y:25929 Z:16000
Recv: ok N9 P15 B4
Send: N10 G1 X5 Y524
Recv: ok N10 P13 B4
Send: N11 G2934
Recv: T:234.14 /240.00 B:80.00 /80.00 T0:234.14 /240.00 T1:34.85 /0.00 @:127 B@:47 @0:127 @1:0
Recv: T:234.53 /240.00 B:80.00 /80.00 T0:234.53 /240.00 T1:35.09 /0.00 @:127 B@:47 @0:127 @1:0
Recv: T:235.47 /240.00 B:80.00 /80.00 T0:235.47 /240.00 T1:35.17 /0.00 @:119 B@:47 @0:119 @1:0
Recv: T:235.78 /240.00 B:80.01 /80.00 T0:235.78 /240.00 T1:35.28 /0.00 @:122 B@:45 @0:122 @1:0
Recv: T:236.41 /240.00 B:80.01 /80.00 T0:236.41 /240.00 T1:35.52 /0.00 @:119 B@:45 @0:119 @1:0
Recv: T:236.64 /240.00 B:80.00 /80.00 T0:236.64 /240.00 T1:35.52 /0.00 @:127 B@:47 @0:127 @1:0
Recv: T:237.19 /240.00 B:80.02 /80.00 T0:237.19 /240.00 T1:35.65 /0.00 @:121 B@:44 @0:121 @1:0
Recv: T:237.81 /240.00 B:80.02 /80.00 T0:237.81 /240.00 T1:35.84 /0.00 @:116 B@:44 @0:116 @1:0
Recv: T:238.05 /240.00 B:80.01 /80.00 T0:238.05 /240.00 T1:35.86 /0.00 @:120 B@:45 @0:120 @1:0
Recv: T:238.52 /240.00 B:80.01 /80.00 T0:238.52 /240.00 T1:35.86 /0.00 @:115 B@:45 @0:115 @1:0
Recv: T:239.06 /240.00 B:80.02 /80.00 T0:239.06 /240.00 T1:35.86 /0.00 @:108 B@:43 @0:108 @1:0
Recv: T:239.14 /240.00 B:80.00 /80.00 T0:239.14 /240.00 T1:35.86 /0.00 @:113 B@:46 @0:113 @1:0
Recv: Rewiping
Recv: T:239.14 /240.00 B:80.00 /80.00 T0:239.14 /240.00 T1:35.91 /0.00 @:119 B@:45 @0:119 @1:0
Recv: T:239.53 /240.00 B:80.00 /80.00 T0:239.53 /240.00 T1:35.93 /0.00 @:111 B@:45 @0:111 @1:0
Recv: T:239.84 /240.00 B:80.00 /80.00 T0:239.84 /240.00 T1:36.14 /0.00 @:106 B@:45 @0:106 @1:0
Recv: T:240.42 /240.00 B:80.00 /80.00 T0:240.42 /240.00 T1:36.21 /0.00 @:94 B@:45 @0:94 @1:0
Recv: T:240.21 /240.00 B:80.00 /80.00 T0:240.21 /240.00 T1:36.25 /0.00 @:105 B@:45 @0:105 @1:0
Recv: T:240.31 /240.00 B:79.99 /80.00 T0:240.31 /240.00 T1:36.44 /0.00 @:103 B@:47 @0:103 @1:0
Recv: T:239.92 /240.00 B:79.99 /80.00 T0:239.92 /240.00 T1:36.53 /0.00 @:114 B@:46 @0:114 @1:0
Recv: T:239.38 /240.00 B:79.96 /80.00 T0:239.38 /240.00 T1:36.59 /0.00 @:127 B@:51 @0:127 @1:0
Recv: T:239.30 /240.00 B:79.98 /80.00 T0:239.30 /240.00 T1:36.85 /0.00 @:127 B@:48 @0:127 @1:0
Recv: T:240.10 /240.00 B:79.98 /80.00 T0:240.10 /240.00 T1:36.90 /0.00 @:104 B@:48 @0:104 @1:0
Recv: T:240.31 /240.00 B:79.99 /80.00 T0:240.31 /240.00 T1:36.96 /0.00 @:101 B@:47 @0:101 @1:0
Recv: Rewiping
Recv: T:240.42 /240.00 B:79.99 /80.00 T0:240.42 /240.00 T1:37.16 /0.00 @:101 B@:48 @0:101 @1:0
Recv: T:240.31 /240.00 B:80.00 /80.00 T0:240.31 /240.00 T1:37.24 /0.00 @:106 B@:46 @0:106 @1:0
Recv: T:240.21 /240.00 B:80.01 /80.00 T0:240.21 /240.00 T1:37.28 /0.00 @:109 B@:45 @0:109 @1:0
Recv: T:240.52 /240.00 B:79.99 /80.00 T0:240.52 /240.00 T1:37.50 /0.00 @:98 B@:48 @0:98 @1:0
Recv: T:240.21 /240.00 B:80.00 /80.00 T0:240.21 /240.00 T1:37.59 /0.00 @:107 B@:47 @0:107 @1:0
Recv: T:240.00 /240.00 B:80.00 /80.00 T0:240.00 /240.00 T1:37.59 /0.00 @:111 B@:47 @0:111 @1:0
Recv: T:239.45 /240.00 B:80.00 /80.00 T0:239.45 /240.00 T1:37.72 /0.00 @:123 B@:47 @0:123 @1:0
Recv: T:239.53 /240.00 B:80.00 /80.00 T0:239.53 /240.00 T1:37.93 /0.00 @:116 B@:47 @0:116 @1:0
Recv: T:239.53 /240.00 B:80.01 /80.00 T0:239.53 /240.00 T1:37.93 /0.00 @:115 B@:45 @0:115 @1:0
Recv: T:240.31 /240.00 B:80.01 /80.00 T0:240.31 /240.00 T1:38.17 /0.00 @:93 B@:45 @0:93 @1:0
Recv: T:240.10 /240.00 B:80.01 /80.00 T0:240.10 /240.00 T1:38.28 /0.00 @:104 B@:45 @0:104 @1:0
Recv: Rewiping
Recv: T:240.42 /240.00 B:80.06 /80.00 T0:240.42 /240.00 T1:38.30 /0.00 @:97 B@:38 @0:97 @1:0
Recv: T:240.52 /240.00 B:80.01 /80.00 T0:240.52 /240.00 T1:38.41 /0.00 @:96 B@:45 @0:96 @1:0
Recv: T:240.42 /240.00 B:80.04 /80.00 T0:240.42 /240.00 T1:38.62 /0.00 @:99 B@:40 @0:99 @1:0
Recv: T:240.42 /240.00 B:80.01 /80.00 T0:240.42 /240.00 T1:38.64 /0.00 @:98 B@:44 @0:98 @1:0
Recv: T:239.84 /240.00 B:80.01 /80.00 T0:239.84 /240.00 T1:38.79 /0.00 @:114 B@:44 @0:114 @1:0
Recv: T:239.30 /240.00 B:80.00 /80.00 T0:239.30 /240.00 T1:38.97 /0.00 @:127 B@:45 @0:127 @1:0
Recv: T:239.14 /240.00 B:80.00 /80.00 T0:239.14 /240.00 T1:38.97 /0.00 @:127 B@:44 @0:127 @1:0
Recv: T:239.22 /240.00 B:80.00 /80.00 T0:239.22 /240.00 T1:39.22 /0.00 @:123 B@:44 @0:123 @1:0
Recv: T:239.45 /240.00 B:80.00 /80.00 T0:239.45 /240.00 T1:39.31 /0.00 @:117 B@:44 @0:117 @1:0
Recv: T:240.00 /240.00 B:80.00 /80.00 T0:240.00 /240.00 T1:39.33 /0.00 @:104 B@:44 @0:104 @1:0
Recv: T:240.83 /240.00 B:80.00 /80.00 T0:240.83 /240.00 T1:39.50 /0.00 @:82 B@:44 @0:82 @1:0
Recv: PROBE FAIL CLEAN NOZZLE
Recv: T:240.42 /240.00 B:80.00 /80.00 T0:240.42 /240.00 T1:39.63 /0.00 @:98 B@:44 @0:98 @1:0
Recv: T:240.10 /240.00 B:79.99 /80.00 T0:240.10 /240.00 T1:39.63 /0.00 @:108 B@:46 @0:108 @1:0
Recv: T:240.31 /240.00 B:80.00 /80.00 T0:240.31 /240.00 T1:39.68 /0.00 @:101 B@:44 @0:101 @1:0
Recv: T:240.21 /240.00 B:80.00 /80.00 T0:240.21 /240.00 T1:39.66 /0.00 @:103 B@:44 @0:103 @1:0
Recv: T:239.77 /240.00 B:79.99 /80.00 T0:239.77 /240.00 T1:39.68 /0.00 @:115 B@:46 @0:115 @1:0
Recv: T:239.69 /240.00 B:79.99 /80.00 T0:239.69 /240.00 T1:39.66 /0.00 @:116 B@:46 @0:116 @1:0
Recv: T:239.77 /240.00 B:79.99 /80.00 T0:239.77 /240.00 T1:39.66 /0.00 @:112 B@:46 @0:112 @1:0
Recv: T:240.00 /240.00 B:80.00 /80.00 T0:240.00 /240.00 T1:39.66 /0.00 @:105 B@:44 @0:105 @1:0
Recv: T:240.21 /240.00 B:80.00 /80.00 T0:240.21 /240.00 T1:39.66 /0.00 @:99 B@:45 @0:99 @1:0
Recv: T:240.31 /240.00 B:80.00 /80.00 T0:240.31 /240.00 T1:39.66 /0.00 @:96 B@:45 @0:96 @1:0
Recv: Error:Printer halted. kill() called!
Changing monitoring state from “Printing” to “Error: Printer halted. kill() called!”
Send: M112
Send: N12 M11218
Send: N13 M104 T0 S019
Send: N14 M140 S0*80
Changing monitoring state from “Error: Printer halted. kill() called!” to “Offline (Error: Printer halted. kill() called!)”
Connection closed, closing down monitor

2

Grab your ohm-meter and test the resistance between pairs of bed-leveling washers (especially any washer that isn’t giving you consistent level). If it’s greater than 1Ω … remove the washer & screw, clean it, and put it back on, then re-test.

Also, between the nozzle tip and your “zero sense” wire (the red-wire) should be less than 1Ω.

3

I assume you’re using a dual head printhead? Is it v2 or v3? A slightly unlevel z axis will produce the exact symptoms you’re experiencing (single or dual head). I’ve seen it where it would correctly just tap the 2nd washer, rise up, pause, repeat 2 more times and fail. Without going through a whole leveling routine you could manually turn the right z axis screw and make a minor adjustment. You have a 50/50 chance of turning it in the correct direction. :crossed_fingers:t2: You might be able to gaze closely and see if it needs to go up or down to bring it back into level.

4

Search this forum for (a pointer to) detailed instructions on how to check for level.

5

Hey, thanks for the tip. I’m getting .7 ohms on the rear two, but upwards of 3 ohms on each of the front two. I cleaned them both with a wire brush to get rid of any debris but the resistance still hasn’t changed. Did you etch yours?

6

Yeah, it’s tapping the washer but still failing. I’ll try messing with the z-level screw

7

When that happens to me (individual washers have higher resistance) I remove the screw and washer, clean it, then put it back on – and this usually improves the conductivity.

I once had a particular corner that was often mis-reading … only to learn that the screw holding the washer in that corner was completely loose (I had probably removed it to flip the PEI to the glass side… and forgot to snug it again). They don’t need to be crazy tight… but should be snug.