# ‎Lulzbot Taz 6 wiping nozzle over z-min switch **URL:** \ **Category:** Hardware\ **Created:** [March 11, 2023, 12:05pm UTC](https://forum.lulzbot.com/t/lulzbot-taz-6-wiping-nozzle-over-z-min-switch/25453 "2023-03-11T12:05:57Z")\ **Posts on this page:** 13\ **Page:** 1
**Author:** ![Salt](https://avatars.discourse-cdn.com/v4/letter/s/34f0e0/32.png) [@Salt](https://forum.lulzbot.com/u/Salt)\ **Post date:** [March 11, 2023, 12:05pm UTC](https://forum.lulzbot.com/t/lulzbot-taz-6-wiping-nozzle-over-z-min-switch/25453/1 "2023-03-11T12:05:57Z")
Hello. I got a Lulzbot Taz 6 that didn’t work and I’ve been trying to fix. I have a Taz 6 with a dual extruder v2 head on it. When I tried to print some gcode using Cura for lulzbot version 3.6.37 it was always failing to probe the bed. It would try to wipe the nozzles and the print head would go too low into the wiping pad and scraping the edges of the pad holder, then when it goes to probe the print head it would fail as the nozzle would touch the bed and not the bed leveling washers. I then tried updating the firmware using Cura to TAZ 6 dualextruderV2 1.1.9.34 and now when I try printing, the printer tries to wipe the nozzle where the z-min switch is, and not where the wiping pad is. I tried flashing an older firmware 1.1.9.28 from the lulzbot website and still the same problem. Even tried the 2.0.0.174 firmware, same problem. The nozzle wipes over the z-min switch and not the wiping pad, and then I get bed leveling failed. Anyone know how to fix this? ---
**Author:** ![b-morgan](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.lulzbot.com/b-morgan/32/11517_2.png) [@b-morgan](https://forum.lulzbot.com/u/b-morgan)\ **Post date:** [March 11, 2023, 1:17pm UTC](https://forum.lulzbot.com/t/lulzbot-taz-6-wiping-nozzle-over-z-min-switch/25453/2 "2023-03-11T13:17:27Z")
Please post a picture of the tool head. Do you have any other tool heads? Hopefully, you have the Single Extruder V2.1 that was the standard tool head shipped with the printer. If you have it, have you successfully printed with it? The Dual Extruder V2 has the two nozzles back to back (second nozzle offset in Y by -50 mm). The Dual Extruder V3 has the two nozzles side by side (second nozzle offset in X by 13mm). I have both dual extruders for my TAZ 6 but my V2 is boxed up. I don’t remember what firmware version worked with it. I’ll get it out and see if I can make it work once we verify that everything else is working on your TAZ 6. Can you also slice something simple like a 5x5x5mm cube and post the gcode produced? Maybe slice two of them side by side in two different colors. ---
**Author:** ![Salt](https://avatars.discourse-cdn.com/v4/letter/s/34f0e0/32.png) [@Salt](https://forum.lulzbot.com/u/Salt)\ **Post date:** [March 11, 2023, 5:18pm UTC](https://forum.lulzbot.com/t/lulzbot-taz-6-wiping-nozzle-over-z-min-switch/25453/3 "2023-03-11T17:18:50Z")
Hi. Here are some photos of the tool head ![20230310_222803](https://us1.discourse-cdn.com/flex020/uploads/lulzbot/original/2X/3/3df1b579db9b7783a7b9d22130f3ba43c406bf88.jpeg) I got the printer from school cause it wasn’t working and they were going to throw it out. I was going to see if I could fix it up and keep it for personal use. I’ll ask if they have the original tool head laying somewhere and if they do I’ll use that because I really don’t care about dual extrusion. I only want to do single extrusion with this dualextruderV2 tool head, and don’t want to spend $300+ for a new single extruder when I’m not even sure if I can get this printer to work properly. ---
**Author:** ![Salt](https://avatars.discourse-cdn.com/v4/letter/s/34f0e0/32.png) [@Salt](https://forum.lulzbot.com/u/Salt)\ **Post date:** [March 11, 2023, 5:19pm UTC](https://forum.lulzbot.com/t/lulzbot-taz-6-wiping-nozzle-over-z-min-switch/25453/4 "2023-03-11T17:19:37Z")
![20230310_222808](https://us1.discourse-cdn.com/flex020/uploads/lulzbot/original/2X/a/a727966dfec99fcf5128b14cfa13a1863fcdd762.jpeg) ---
**Author:** ![Salt](https://avatars.discourse-cdn.com/v4/letter/s/34f0e0/32.png) [@Salt](https://forum.lulzbot.com/u/Salt)\ **Post date:** [March 11, 2023, 5:48pm UTC](https://forum.lulzbot.com/t/lulzbot-taz-6-wiping-nozzle-over-z-min-switch/25453/5 "2023-03-11T17:48:51Z")
Here is the G-Code for a simple square ;Generated by Cura LulzBot Edition GCodeWriter Version: 3.6.37 ;FLAVOR:Marlin ;TIME:55 ;Filament used: 0.0114215m, 0m ;Layer height: 0.265 ;Generated with Cura\_SteamEngine 3.6.37-win10 T0 M82 ;absolute extrusion mode ;This profile is designed specifically for LulzBot TAZ6 3D Printer with Dual Extruder V2 Tool Head M75 ; start GLCD timer G26 ; clear potential ‘probe fail’ condition M107 ; disable fans M420 S0 ; disable leveling matrix G90 ; absolute positioning T0 ; select this extruder first M82 ; set extruder to absolute mode G92 E0 ; set extruder position to 0 M140 S67.5 ; get bed heating up M104 R170 T1 ; soften filament M109 R140 T0 ; soften filament M109 R170 T1 ; soften filament G28 X Y ; home X and Y G1 X-19 Y258 ; move over the Z\_MIN switch M104 R170 T1 ; wait for T1 to reach temp M109 R140 T0 ; wait for T0 to reach temp M109 R170 T1 ; wait for T1 to reach temp G28 Z ; home Z G1 E-15 F100 ; suck up XXmm of filament T1 ; switch extruders M82 ; set extruder to absolute mode G92 E0 ; set E to 0 G1 E-15 F100 ; suck up filament T0 ; switch extruders ;G92 E-60 ; adjust E value G1 X-17 Y100 F3000 ; move above wiper pad G1 Z1 ; push nozzle into wiper G1 X-19 Y95 F1000 ; slow wipe G1 X-17 Y90 F1000 ; slow wipe G1 X-19 Y85 F1000 ; slow wipe G1 X-17 Y90 F1000 ; slow wipe G1 X-19 Y80 F1000 ; slow wipe G1 X-17 Y95 F1000 ; slow wipe G1 X-19 Y75 F2000 ; fast wipe G1 X-17 Y85 F2000 ; fast wipe G1 X-19 Y80 F2000 ; fast wipe G1 X-17 Y70 F2000 ; fast wipe G1 X-19 Y75 F2000 ; fast wipe G1 X-17 Y95 F1000 ; slow wipe G1 X-19 Y90 F1000 ; slow wipe G1 X-17 Y85 F1000 ; slow wipe G1 X-19 Y90 F1000 ; slow wipe G1 X-17 Y80 F1000 ; slow wipe G1 X-19 Y95 F1000 ; slow wipe G1 X-17 Y75 F2000 ; fast wipe G1 X-19 Y85 F2000 ; fast wipe G1 X-17 Y80 F2000 ; fast wipe G1 X-19 Y90 F2000 ; fast wipe G1 X-17 Y85 F2000 ; fast wipe G1 Z10 ; raise extruder M109 R140 ; heat to probe temp G1 X-9 Y-9 ; move above first probe point M204 S100 ; set accel for probing G29 ; probe sequence (for auto-leveling) M420 S1 ; enable leveling matrix M425 Z ; use measured Z backlash for compensation M425 Z F0 ; turn off measured Z backlash compensation. (if activated in the quality settings, this command will automatically be ignored) M204 S500 ; set accel back to normal G1 X0 Y0 Z15 F5000 ; get out the way M400 ; clear buffer M140 S67.5; get bed heating up M104 S250 T1; set extruder temp M109 R210 T0 ; set extruder temp and wait M109 R250 T1; set extruder temp and wait T1 ; switch to second extruder G1 E0 F100 ; prime nozzle from previous print G1 F100 E-1.75 ;retract second nozzle before print G92 E-30 ; adjust to 1st nozzle e value T0 ; switch back to back M190 R67.5; get bed temping up during first layer G1 Z2 E0 F75 ; extrude filament back into nozzle M117 TAZ Printing… ; LCD status message M221 S100 T0 M221 S100 T1 G92 E0 G1 F600 E-1.75 ;LAYER\_COUNT:2 ;LAYER:0 M107 G0 F2625 X130.628 Y130.672 Z0.25 ;TYPE:SKIRT G1 F600 E0 G1 F900 X131.088 Y130.263 E0.01206 G1 X131.598 Y129.916 E0.02415 G1 X132.148 Y129.639 E0.03621 G1 X132.729 Y129.435 E0.04828 G1 X133.332 Y129.307 E0.06036 G1 X134.009 Y129.259 E0.07366 G1 X145.991 Y129.26 E0.30844 G1 X146.606 Y129.3 E0.32051 G1 X147.211 Y129.419 E0.33259 G1 X147.795 Y129.616 E0.34467 G1 X148.348 Y129.886 E0.35673 G1 X148.862 Y130.226 E0.3688 G1 X149.328 Y130.629 E0.38088 G1 X149.737 Y131.09 E0.39295 G1 X150.084 Y131.599 E0.40502 G1 X150.361 Y132.149 E0.41709 G1 X150.565 Y132.731 E0.42917 G1 X150.693 Y133.333 E0.44123 G1 X150.741 Y134.01 E0.45453 G1 X150.741 Y145.991 E0.68929 G1 X150.701 Y146.606 E0.70137 G1 X150.582 Y147.21 E0.71343 G1 X150.385 Y147.794 E0.72551 G1 X150.115 Y148.348 E0.73758 G1 X149.775 Y148.862 E0.74966 G1 X149.372 Y149.328 E0.76173 G1 X148.912 Y149.737 E0.77379 G1 X148.402 Y150.084 E0.78588 G1 X147.852 Y150.361 E0.79794 G1 X147.271 Y150.565 E0.81001 G1 X146.668 Y150.693 E0.82209 G1 X145.991 Y150.741 E0.83539 G1 X134.009 Y150.741 E1.07017 G1 X133.394 Y150.701 E1.08224 G1 X132.79 Y150.582 E1.0943 G1 X132.206 Y150.385 E1.10638 G1 X131.652 Y150.115 E1.11846 G1 X131.138 Y149.775 E1.13053 G1 X130.672 Y149.372 E1.1426 G1 X130.263 Y148.912 E1.15467 G1 X129.916 Y148.402 E1.16675 G1 X129.639 Y147.852 E1.17882 G1 X129.435 Y147.271 E1.19088 G1 X129.307 Y146.668 E1.20296 G1 X129.259 Y145.991 E1.21626 G1 X129.259 Y134.009 E1.45104 G1 X129.299 Y133.394 E1.46312 G1 X129.418 Y132.79 E1.47518 G1 X129.615 Y132.206 E1.48726 G1 X129.885 Y131.652 E1.49933 G1 X130.225 Y131.138 E1.51141 G1 X130.628 Y130.672 E1.52348 G0 F2625 X131.12 Y130.892 G1 F900 X131.574 Y130.526 E1.53491 G1 X132.073 Y130.226 E1.54631 G1 X132.609 Y129.996 E1.55774 G1 X133.171 Y129.842 E1.56916 G1 X134.009 Y129.759 E1.58566 G1 X145.991 Y129.76 E1.82044 G1 X146.573 Y129.8 E1.83187 G1 X147.143 Y129.919 E1.84328 G1 X147.692 Y130.115 E1.8547 G1 X148.209 Y130.385 E1.86613 G1 X148.684 Y130.722 E1.87754 G1 X149.108 Y131.121 E1.88895 G1 X149.474 Y131.575 E1.90038 G1 X149.775 Y132.074 E1.9118 G1 X150.004 Y132.61 E1.92322 G1 X150.158 Y133.172 E1.93464 G1 X150.241 Y134.01 E1.95114 G1 X150.241 Y145.991 E2.1859 G1 X150.201 Y146.572 E2.19731 G1 X150.082 Y147.143 E2.20874 G1 X149.886 Y147.692 E2.22016 G1 X149.617 Y148.208 E2.23156 G1 X149.279 Y148.684 E2.243 G1 X148.88 Y149.108 E2.25441 G1 X148.426 Y149.474 E2.26583 G1 X147.927 Y149.774 E2.27724 G1 X147.391 Y150.004 E2.28867 G1 X146.829 Y150.158 E2.30009 G1 X145.991 Y150.241 E2.31659 G1 X134.009 Y150.241 E2.55137 G1 X133.428 Y150.201 E2.56278 G1 X132.857 Y150.082 E2.57421 G1 X132.308 Y149.886 E2.58563 G1 X131.792 Y149.617 E2.59703 G1 X131.316 Y149.279 E2.60847 G1 X130.892 Y148.88 E2.61988 G1 X130.526 Y148.426 E2.63131 G1 X130.226 Y147.927 E2.64272 G1 X129.996 Y147.391 E2.65414 G1 X129.842 Y146.829 E2.66556 G1 X129.759 Y145.991 E2.68206 G1 X129.759 Y134.009 E2.91684 G1 X129.799 Y133.428 E2.92825 G1 X129.918 Y132.857 E2.93968 G1 X130.114 Y132.308 E2.9511 G1 X130.383 Y131.792 E2.96251 G1 X130.721 Y131.316 E2.97395 G1 X131.12 Y130.892 E2.98535 G0 F2625 X131.216 Y131.507 G1 F900 X131.61 Y131.127 E2.99608 G1 X132.055 Y130.808 E3.00681 G1 X132.542 Y130.558 E3.01753 G1 X133.06 Y130.381 E3.02826 G1 X133.598 Y130.282 E3.03898 G1 X134.009 Y130.259 E3.04704 G1 X145.991 Y130.26 E3.28182 G1 X146.537 Y130.3 E3.29255 G1 X147.071 Y130.419 E3.30327 G1 X147.583 Y130.615 E3.31401 G1 X148.06 Y130.882 E3.32472 G1 X148.493 Y131.217 E3.33545 G1 X148.873 Y131.611 E3.34618 G1 X149.192 Y132.056 E3.35691 G1 X149.442 Y132.543 E3.36763 G1 X149.619 Y133.061 E3.37836 G1 X149.718 Y133.599 E3.38908 G1 X149.741 Y134.01 E3.39714 G1 X149.741 Y145.991 E3.6319 G1 X149.701 Y146.537 E3.64263 G1 X149.582 Y147.071 E3.65335 G1 X149.387 Y147.582 E3.66407 G1 X149.119 Y148.06 E3.6748 G1 X148.784 Y148.493 E3.68553 G1 X148.39 Y148.873 E3.69626 G1 X147.945 Y149.192 E3.70699 G1 X147.458 Y149.442 E3.71771 G1 X146.94 Y149.619 E3.72844 G1 X146.402 Y149.718 E3.73916 G1 X145.991 Y149.741 E3.74722 G1 X134.009 Y149.741 E3.982 G1 X133.463 Y149.701 E3.99273 G1 X132.929 Y149.582 E4.00345 G1 X132.418 Y149.387 E4.01417 G1 X131.94 Y149.119 E4.0249 G1 X131.507 Y148.784 E4.03563 G1 X131.127 Y148.39 E4.04636 G1 X130.808 Y147.945 E4.05709 G1 X130.558 Y147.458 E4.06781 G1 X130.381 Y146.94 E4.07854 G1 X130.282 Y146.402 E4.08926 G1 X130.259 Y145.991 E4.09732 G1 X130.259 Y134.009 E4.3321 G1 X130.299 Y133.463 E4.34283 G1 X130.418 Y132.929 E4.35355 G1 X130.613 Y132.418 E4.36427 G1 X130.881 Y131.94 E4.375 G1 X131.216 Y131.507 E4.38573 G0 F2625 X131.709 Y131.713 G1 F900 X132.096 Y131.381 E4.39572 G1 X132.531 Y131.115 E4.40571 G1 X133.001 Y130.919 E4.41569 G1 X133.496 Y130.8 E4.42567 G1 X134.009 Y130.759 E4.43575 G1 X145.991 Y130.76 E4.67053 G1 X146.499 Y130.8 E4.68051 G1 X146.995 Y130.919 E4.69051 G1 X147.465 Y131.114 E4.70048 G1 X147.9 Y131.38 E4.71047 G1 X148.288 Y131.71 E4.72045 G1 X148.619 Y132.098 E4.73044 G1 X148.885 Y132.532 E4.74042 G1 X149.081 Y133.002 E4.7504 G1 X149.2 Y133.498 E4.76039 G1 X149.241 Y134.01 E4.77045 G1 X149.241 Y145.991 E5.00521 G1 X149.201 Y146.499 E5.0152 G1 X149.082 Y146.994 E5.02517 G1 X148.887 Y147.465 E5.03516 G1 X148.621 Y147.9 E5.04515 G1 X148.291 Y148.287 E5.05512 G1 X147.904 Y148.619 E5.06511 G1 X147.469 Y148.885 E5.0751 G1 X146.999 Y149.081 E5.08508 G1 X146.504 Y149.2 E5.09506 G1 X145.991 Y149.241 E5.10514 G1 X134.009 Y149.241 E5.33992 G1 X133.501 Y149.201 E5.3499 G1 X133.006 Y149.082 E5.35988 G1 X132.535 Y148.887 E5.36987 G1 X132.1 Y148.621 E5.37986 G1 X131.713 Y148.291 E5.38982 G1 X131.381 Y147.904 E5.39981 G1 X131.115 Y147.469 E5.40981 G1 X130.919 Y146.999 E5.41978 G1 X130.8 Y146.504 E5.42976 G1 X130.759 Y145.991 E5.43984 G1 X130.759 Y134.009 E5.67462 G1 X130.799 Y133.501 E5.68461 G1 X130.918 Y133.006 E5.69458 G1 X131.113 Y132.535 E5.70457 G1 X131.379 Y132.1 E5.71456 G1 X131.709 Y131.713 E5.72453 G1 F600 E3.97453 ;MESH: G0 F2625 X134.514 Y133.335 G0 X134.514 Y134.514 G0 X134.982 Y145.018 G0 X145.25 Y145.25 ;TYPE:WALL-INNER G1 F600 E5.72453 G1 F900 X134.75 Y145.25 E5.93027 G1 X134.75 Y134.75 E6.13601 G1 X145.25 Y134.75 E6.34175 G1 X145.25 Y145.25 E6.54749 G0 F2625 X145.75 Y145.75 ;TYPE:WALL-OUTER G1 F900 X134.25 Y145.75 E6.77282 G1 X134.25 Y134.25 E6.99816 G1 X145.75 Y134.25 E7.22349 G1 X145.75 Y145.75 E7.44883 G0 F2625 X145.5 Y145.75 G0 X145.43 Y145.43 G0 X145.09 Y144.76 G0 X144.76 Y144.76 ;TYPE:SKIN G1 F900 X135.24 Y144.76 E7.63537 G1 X135.24 Y135.24 E7.8219 G1 X144.76 Y135.24 E8.00844 G1 X144.76 Y144.76 E8.19498 G0 F2625 X145.09 Y144.76 G0 X145.09 Y136.049 G0 X144.534 Y136.049 G1 F900 X143.949 Y135.464 E8.21119 G0 F2625 X143.242 Y135.464 G1 F900 X144.534 Y136.756 E8.24699 G0 F2625 X144.534 Y137.463 G1 F900 X142.535 Y135.464 E8.30239 G0 F2625 X141.828 Y135.464 G1 F900 X144.534 Y138.17 E8.37737 G0 F2625 X144.534 Y138.877 G1 F900 X141.121 Y135.464 E8.47195 G0 F2625 X140.414 Y135.464 G1 F900 X144.534 Y139.584 E8.58612 G0 F2625 X144.534 Y140.292 G1 F900 X139.707 Y135.464 E8.71989 G0 F2625 X139 Y135.464 G1 F900 X144.534 Y140.999 E8.87325 G0 F2625 X144.534 Y141.706 G1 F900 X138.293 Y135.464 E9.04621 G0 F2625 X137.586 Y135.464 G1 F900 X144.534 Y142.413 E9.23875 G0 F2625 X144.534 Y143.12 G1 F900 X136.878 Y135.464 E9.45091 G0 F2625 X136.171 Y135.464 G1 F900 X144.534 Y143.827 E9.68265 G0 F2625 X144.534 Y144.534 G1 F900 X135.464 Y135.464 E9.93398 G0 F2625 X135.464 Y136.171 G1 F900 X143.826 Y144.534 E10.16571 G0 F2625 X143.119 Y144.534 G1 F900 X135.464 Y136.878 E10.37785 G0 F2625 X135.464 Y137.586 G1 F900 X142.412 Y144.534 E10.57039 G0 F2625 X141.705 Y144.534 G1 F900 X135.464 Y138.293 E10.74333 G0 F2625 X135.464 Y139 G1 F900 X140.998 Y144.534 E10.89668 G0 F2625 X140.291 Y144.534 G1 F900 X135.464 Y139.707 E11.03044 G0 F2625 X135.464 Y140.414 G1 F900 X139.584 Y144.534 E11.1446 G0 F2625 X138.877 Y144.534 G1 F900 X135.464 Y141.121 E11.23918 G0 F2625 X135.464 Y141.828 G1 F900 X138.17 Y144.534 E11.31417 G0 F2625 X137.462 Y144.534 G1 F900 X135.464 Y142.535 E11.36954 G0 F2625 X135.464 Y143.242 G1 F900 X136.755 Y144.534 E11.40533 G0 F2625 X136.048 Y144.534 G1 F900 X135.464 Y143.949 E11.42153 G0 F2625 X135 Y143.949 ;TIME\_ELAPSED:55.143395 G1 F600 E9.67153 M140 S0 M400 M104 S0 T0 ; T0 hotend off M104 S0 T1 ; T1 hotend off M107 ; fans off G91 ; relative positioning T0 G1 E-1 F300 ; retract the filament a bit before lifting the nozzle, to release some of the pressure G1 Z20 E-5 X-20 Y-20 F3000 ; move Z up a bit and retract filament even more G1 E6 ; re-prime extruder 1 T1 G1 E-5 F300 ; retract the filament a bit before lifting the nozzle, to release some of the pressure G1 E5 ; re-prime extruder 2 T0 M117 Cooling please wait ; progress indicator message G90 ; absolute positioning G1 Y0 F3000 ; move to cooling position M190 R47.5 ; set bed to cool off G1 Y280 F3000 ; present finished print M140 S47.5; keep temperature or cool downs M77 ; stop GLCD timer M84 ; steppers off G90 ; absolute positioning M117 Print complete ; progress indicator message M82 ;absolute extrusion mode ;End of Gcode ---
**Author:** ![b-morgan](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.lulzbot.com/b-morgan/32/11517_2.png) [@b-morgan](https://forum.lulzbot.com/u/b-morgan)\ **Post date:** [March 11, 2023, 6:19pm UTC](https://forum.lulzbot.com/t/lulzbot-taz-6-wiping-nozzle-over-z-min-switch/25453/6 "2023-03-11T18:19:46Z")
It does look like from your pictures that there is an adapter plate over the Z-min switch. Am I right? ![20230311_054043](https://us1.discourse-cdn.com/flex020/uploads/lulzbot/original/2X/6/666e61664c3cdb036fa9f4b04b0dc6952578f57e.jpeg) ---
**Author:** ![Salt](https://avatars.discourse-cdn.com/v4/letter/s/34f0e0/32.png) [@Salt](https://forum.lulzbot.com/u/Salt)\ **Post date:** [March 11, 2023, 6:40pm UTC](https://forum.lulzbot.com/t/lulzbot-taz-6-wiping-nozzle-over-z-min-switch/25453/7 "2023-03-11T18:40:06Z")
Hi. Yes I do have that adapter on. I removed the adapter but still get the same problem. It wipes the nozzles over the z-min switch area and ends the print with probing failed. ---
**Author:** ![Salt](https://avatars.discourse-cdn.com/v4/letter/s/34f0e0/32.png) [@Salt](https://forum.lulzbot.com/u/Salt)\ **Post date:** [March 11, 2023, 7:15pm UTC](https://forum.lulzbot.com/t/lulzbot-taz-6-wiping-nozzle-over-z-min-switch/25453/8 "2023-03-11T19:15:30Z")
Here’s a video of what’s happening. [![](https://us1.discourse-cdn.com/flex020/uploads/lulzbot/original/2X/6/6d5b6b62d92be9466d71f0e56f6a6218d0232609.jpeg "Lulzbot Taz 6 dualextruderV2 problem") ](https://www.youtube.com/watch?v=u9jdptmAwng) ---
**Author:** ![b-morgan](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.lulzbot.com/b-morgan/32/11517_2.png) [@b-morgan](https://forum.lulzbot.com/u/b-morgan)\ **Post date:** [March 11, 2023, 7:31pm UTC](https://forum.lulzbot.com/t/lulzbot-taz-6-wiping-nozzle-over-z-min-switch/25453/9 "2023-03-11T19:31:32Z")
I got my Dual Extruder V2 out of its box but after installing it I noticed that the cold end cooling fan on E0 (back extruder) has a broken mount so the fan is just hanging loose. I did update the firmware to 1.1.9.34 and was able manually to do a `G28 XY` and a `G28 Z` with the Z-Min adapter in place. I then manually moved the tool head with `G0 X50 Y50` and lowered Z via the LCD control panel 1mm at a time until I got to 0. At this point, the nozzle was around 5-10mm above the bed so I believe the adapter isn’t used on the Dual Extruder V2 so I removed it and tried again. This time I got to Z2.0 and the nozzles are almost touching the bed so further investigation would be required. The next experiment is to manually move Z to a save 10mm (`G0 Z10`) and then manually move the tool head to the first position of the wipe sequence `G1 X-17 Y100 F3000 ; move above wiper pad`. The back nozzle is just inside the back of the pad and is centered on the pad. Next, `G1 X-17 Y70 F2000 ; fast wipe` which is the minimum Y value in the wipe sequence. The front nozzle (E1) is near the front of the pad but still over it. I can’t do a `G29 V4` because of the loose fan. I’ll try to glue it in place with some silicone and try again after that dries. ![Dual-Extruder-V2](https://us1.discourse-cdn.com/flex020/uploads/lulzbot/original/2X/c/c9d5a2d0b6f79700c46514b23a69dbcdb7039ee3.jpeg) Try these commands on your system and see where things go wrong. ---
**Author:** ![b-morgan](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.lulzbot.com/b-morgan/32/11517_2.png) [@b-morgan](https://forum.lulzbot.com/u/b-morgan)\ **Post date:** [March 11, 2023, 7:41pm UTC](https://forum.lulzbot.com/t/lulzbot-taz-6-wiping-nozzle-over-z-min-switch/25453/10 "2023-03-11T19:41:07Z")
If you do get the V2 to work, the cold end fans were barely adequate. Here’s a [pointer](https://forum.lulzbot.com/t/dual-extruder-v2-heat-block-fan-upgrade/3366#p38183) to an upgrade that I’d consider if I still used the V2. Also, here’s a [Single Extruder on eBay](https://www.ebay.com/itm/204254256886) with a .35mm nozzle (which could easily be changed back to a stock .5mm). Make an offer! ---
**Author:** ![Salt](https://avatars.discourse-cdn.com/v4/letter/s/34f0e0/32.png) [@Salt](https://forum.lulzbot.com/u/Salt)\ **Post date:** [March 11, 2023, 8:15pm UTC](https://forum.lulzbot.com/t/lulzbot-taz-6-wiping-nozzle-over-z-min-switch/25453/11 "2023-03-11T20:15:37Z")
When I initially got the printer the extruder would only move in the -x direction and not the +x direction. This was because there’s no limit switch for the +x side so the printer thought the switch was being pressed at all times. I took out the pins from the connector and shorted them together and the printer would now work in the +x direction, but on the old firmware. Since updating the printer it seems like that part was fixed in the firmware and having the two pins shorted makes the printer now think the limit switch is pressed. I disconnected the short between the pins and now it’s wiping in the correct location again. Printer location and bed leveling is working now. When I run a print the first layer is nothing, it looks like the nozzle is hitting the bed and not letting material come out. I’m assuming this has to do with the probe z offset setting. I’ll play around with it and see what I can find. Thank you very much for your time and assistance in troubleshooting my problem. ---
**Author:** ![sjgsharkman](https://avatars.discourse-cdn.com/v4/letter/s/edb3f5/32.png) [@sjgsharkman](https://forum.lulzbot.com/u/sjgsharkman)\ **Post date:** [January 5, 2024, 5:58pm UTC](https://forum.lulzbot.com/t/lulzbot-taz-6-wiping-nozzle-over-z-min-switch/25453/12 "2024-01-05T17:58:32Z")
I am having the same issue you described and I am new to this printer. Can you please send a picture of what you disconnected? Thank you! ---
**Author:** ![b-morgan](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.lulzbot.com/b-morgan/32/11517_2.png) [@b-morgan](https://forum.lulzbot.com/u/b-morgan)\ **Post date:** [January 6, 2024, 1:47pm UTC](https://forum.lulzbot.com/t/lulzbot-taz-6-wiping-nozzle-over-z-min-switch/25453/13 "2024-01-06T13:47:18Z")
> [@sjgsharkman](#): > > same issue you described Since you didn’t direct your reply to anyone in particular, I’m not sure you will get a response. It would be best if you opened a new topic and added as much detail as possible on exactly what your issue is along with details about your printer, tool head, firmware, host, slicer, etc. Pictures (and/or videos) are also helpful.