# My LuLzbot Taz 6 loses connection to PC. How can I resume the print? **URL:** \ **Category:** Software\ **Created:** [February 13, 2020, 2:34pm UTC](https://forum.lulzbot.com/t/my-lulzbot-taz-6-loses-connection-to-pc-how-can-i-resume-the-print/20774 "2020-02-13T14:34:41Z")\ **Posts on this page:** 12\ **Page:** 1
**Author:** ![Jason\_Retro](https://avatars.discourse-cdn.com/v4/letter/j/e274bd/32.png) [@Jason\_Retro](https://forum.lulzbot.com/u/Jason_Retro)\ **Post date:** [February 13, 2020, 2:34pm UTC](https://forum.lulzbot.com/t/my-lulzbot-taz-6-loses-connection-to-pc-how-can-i-resume-the-print/20774/1 "2020-02-13T14:34:41Z")
This cause the nozzle to stop on the print because it not getting the next step on what to do from the PC. I have seen many video and they all take the same step by cleaning and re-homing the nozzle. Here is where things start to differ, they are able to access their G-code through the slicer program and tell the print to start from a height (which is at the top of the object) and are able to click print from there. My issues is I can not find this G-code with the slicer program the Taz6 uses. Any help on resume a print after a PC disconnect would be helpful. ---
**Author:** ![TheVirtualTim](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.lulzbot.com/thevirtualtim/32/9965_2.png) [@TheVirtualTim](https://forum.lulzbot.com/u/TheVirtualTim)\ **Post date:** [February 13, 2020, 3:06pm UTC](https://forum.lulzbot.com/t/my-lulzbot-taz-6-loses-connection-to-pc-how-can-i-resume-the-print/20774/2 "2020-02-13T15:06:31Z")
Most slicers put comments in the G-Code file indicating the layer number. E.g. for Cura, the comment looks like this: ``` ;LAYER:5 ``` The number indicates the layer. Anything following a semi-colon in a g-code file is a comment (not real code). Cura (and most slicers) embed comments to indicate each new layer. You can open the g-code file with a text editor (make sure it’s a text editor that wont put special characters in the file) and edit out the lines between layer 0 and the layer you need. IMPORTANT: Some of the g-code near the start of the file is the printers “Start” g-code. This is the stuff that starts pre-heating the bed, wiping the nozzles, doing the bed-level process, etc. With a partially build part on the build plate you probably have to skip that because the X axis gantry will probably hit your part. This means you’ll likely need to delete even your start g-code and just manually set the temperatures and prime the nozzle. ---
**Author:** ![Jason\_Retro](https://avatars.discourse-cdn.com/v4/letter/j/e274bd/32.png) [@Jason\_Retro](https://forum.lulzbot.com/u/Jason_Retro)\ **Post date:** [February 13, 2020, 3:37pm UTC](https://forum.lulzbot.com/t/my-lulzbot-taz-6-loses-connection-to-pc-how-can-i-resume-the-print/20774/3 "2020-02-13T15:37:27Z")
Thank you, but in Lulzbot Cura edition I can not find the location to access this G-code. Is it accessible through the program or do I have to do some file digging? ---
**Author:** ![PdxSteve](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.lulzbot.com/pdxsteve/32/9403_2.png) [@PdxSteve](https://forum.lulzbot.com/u/PdxSteve)\ **Post date:** [February 13, 2020, 5:36pm UTC](https://forum.lulzbot.com/t/my-lulzbot-taz-6-loses-connection-to-pc-how-can-i-resume-the-print/20774/4 "2020-02-13T17:36:18Z")
After slicing, instead of “Print via USB” (or whatever the actual text is), choose Save file. That will save the file as gcode and then you can open/edit it. ---
**Author:** ![Jason\_Retro](https://avatars.discourse-cdn.com/v4/letter/j/e274bd/32.png) [@Jason\_Retro](https://forum.lulzbot.com/u/Jason_Retro)\ **Post date:** [February 13, 2020, 6:03pm UTC](https://forum.lulzbot.com/t/my-lulzbot-taz-6-loses-connection-to-pc-how-can-i-resume-the-print/20774/5 "2020-02-13T18:03:14Z")
Thank you all for the help. I will see if I change the right stuff to resume this stopped print. ---
**Author:** ![Jason\_Retro](https://avatars.discourse-cdn.com/v4/letter/j/e274bd/32.png) [@Jason\_Retro](https://forum.lulzbot.com/u/Jason_Retro)\ **Post date:** [February 14, 2020, 5:14am UTC](https://forum.lulzbot.com/t/my-lulzbot-taz-6-loses-connection-to-pc-how-can-i-resume-the-print/20774/6 "2020-02-14T05:14:32Z")
G-code details Make sure the g-code is suitable for your printer and printer configuration before sending the file to it. The g-code representation may not be accurate This is the error I am getting now and this is the G-code after the change. ;Generated by Cura LulzBot Edition GCodeWriter Version: 3.6.20 ;FLAVOR:Marlin ;TIME:97719 ;Filament used: 79.9729m ;Layer height: 0.25 ;Generated with Cura\_SteamEngine 3.6.20 M82 ;absolute extrusion mode ;This G-Code has been generated specifically for the LulzBot TAZ 6 with standard extruder M73 P0 ; clear GLCD progress bar M75 ; start GLCD timer G26 ; clear potential ‘probe fail’ condition M107 ; disable fans M420 S0 ; disable previous leveling matrix G90 ; absolute positioning M82 ; set extruder to absolute mode G92 E0 ; set extruder position to 0 M140 S60.0 ; start bed heating up M109 R140 ; soften filament before homing Z G28 ; Home all axis G1 E-30 F100 ; retract filament M109 R140 ; wait for extruder to reach wiping temp G1 X-15 Y100 F3000 ; move above wiper pad G1 Z1 ; push nozzle into wiper G1 X-17 Y95 F1000 ; slow wipe G1 X-17 Y90 F1000 ; slow wipe G1 X-17 Y85 F1000 ; slow wipe G1 X-15 Y90 F1000 ; slow wipe G1 X-17 Y80 F1000 ; slow wipe G1 X-15 Y95 F1000 ; slow wipe G1 X-17 Y75 F2000 ; fast wipe G1 X-15 Y65 F2000 ; fast wipe G1 X-17 Y70 F2000 ; fast wipe G1 X-15 Y60 F2000 ; fast wipe G1 X-17 Y55 F2000 ; fast wipe G1 X-15 Y50 F2000 ; fast wipe G1 X-17 Y40 F2000 ; fast wipe G1 X-15 Y45 F2000 ; fast wipe G1 X-17 Y35 F2000 ; fast wipe G1 X-15 Y40 F2000 ; fast wipe G1 X-17 Y70 F2000 ; fast wipe G1 X-15 Y30 Z2 F2000 ; fast wipe G1 X-17 Y35 F2000 ; fast wipe G1 X-15 Y25 F2000 ; fast wipe G1 X-17 Y30 F2000 ; fast wipe G1 X-15 Y25 Z1.5 F1000 ; slow wipe G1 X-17 Y23 F1000 ; slow wipe G1 Z10 ; raise extruder M109 R140 ; wait for extruder to reach probe temp G1 X-9 Y-9 ; move above first probe point M204 S100 ; set probing acceleration G29 ; start auto-leveling sequence M420 S1 ; activate bed level 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 ; restore standard acceleration G1 X0 Y0 Z15 F5000 ; move up off last probe point G4 S1 ; pause M400 ; wait for moves to finish M117 Heating… ; progress indicator message on LCD M109 R210 ; wait for extruder to reach printing temp M190 R60.0 ; wait for bed to reach printing temp G1 Z2 E0 F75 ; prime tiny bit of filament into the nozzle M117 TAZ 6 Printing… ; progress indicator message on LCD M221 S100 T0 G92 E0 G1 F600 E-1.75 ;LAYER\_COUNT:600 ;LAYER:385 ;MESH:NONMESH G0 F10500 X66.678 Y126.706 G0 X66.678 Y125.271 G0 X66.68 Y115.295 ;TIME\_ELAPSED:62480.147795 ;LAYER:385 Sorry for the mess. Site will not let me put images in yet. Where did I go wrong? ---
**Author:** ![TheVirtualTim](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.lulzbot.com/thevirtualtim/32/9965_2.png) [@TheVirtualTim](https://forum.lulzbot.com/u/TheVirtualTim)\ **Post date:** [February 14, 2020, 6:11am UTC](https://forum.lulzbot.com/t/my-lulzbot-taz-6-loses-connection-to-pc-how-can-i-resume-the-print/20774/7 "2020-02-14T06:11:33Z")
M109 R140 seems suspect… what filament are you using? This command tells the printer to wait for the extruder to reach 140°C … which is lower than the soften temp for most filaments. (My guess is that temp should be closer to 180°C). Typically the printer needs to raise the nozzle temp to just slightly above the glass-transition temp for your material. E.g. if you were printing PLA with a glass-transition temp of 175°C then it would probably raise the temp to 180 … retract a bit of filament, then drop the temp to 170°C and do the “wipe” on the wiper pads … then drop to probe temp (usually 160°C) and do the bed-level. You have all these temps set to 140°C which seems too low… and that’s why I’m wondering what material you are using. Check the material settings. ---
**Author:** ![Jason\_Retro](https://avatars.discourse-cdn.com/v4/letter/j/e274bd/32.png) [@Jason\_Retro](https://forum.lulzbot.com/u/Jason_Retro)\ **Post date:** [February 14, 2020, 6:34am UTC](https://forum.lulzbot.com/t/my-lulzbot-taz-6-loses-connection-to-pc-how-can-i-resume-the-print/20774/8 "2020-02-14T06:34:44Z")
Lets look at the code from this point and after. I did not change any of the start up code. M221 S100 T0 G92 E0 G1 F600 E-1.75 ;LAYER\_COUNT:600 ;LAYER:385 ;MESH:NONMESH G0 F10500 X66.678 Y126.706 G0 X66.678 Y125.271 G0 X66.68 Y115.295 ;TIME\_ELAPSED:62480.147795 ;LAYER:385 ---
**Author:** ![Jason\_Retro](https://avatars.discourse-cdn.com/v4/letter/j/e274bd/32.png) [@Jason\_Retro](https://forum.lulzbot.com/u/Jason_Retro)\ **Post date:** [February 14, 2020, 2:23pm UTC](https://forum.lulzbot.com/t/my-lulzbot-taz-6-loses-connection-to-pc-how-can-i-resume-the-print/20774/9 "2020-02-14T14:23:16Z")
The additional error I am getting is Print setup disabled G-code files cannot be modified Any help to get pass this will be great. ---
**Author:** ![TheVirtualTim](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.lulzbot.com/thevirtualtim/32/9965_2.png) [@TheVirtualTim](https://forum.lulzbot.com/u/TheVirtualTim)\ **Post date:** [February 15, 2020, 10:10pm UTC](https://forum.lulzbot.com/t/my-lulzbot-taz-6-loses-connection-to-pc-how-can-i-resume-the-print/20774/10 "2020-02-15T22:10:05Z")
Here’s what that snippet of code does: ``` M221 S100 T0 ``` This sets the “flow rate” for the printer to 100% flow (the normal flow rate) at extruder “0” (T0). A dual-extruder printer would have T0 and T1 … your printer only has a T0. ``` G92 E0 ``` This resets the E axis (the extruder) to the “0” point. This is does so that any extrusion performed in absolute mode will be relative to that position. ``` G1 F600 E-1.75 ``` This causes the printer to pull back 1.75mm of filament (it is a retraction move) at a Feedrate of 600mm per minute (10mm per second). The next few lines are comments (anything after a semi-colon is a comment) ``` G0 F10500 X66.678 Y126.706 ``` This performs a move to that X/Y coordinate position (leaving the Z height alone) at 10500mm per minute (which works out to 175mm/sec). That’s a fairly fast move and presumably a non-printing move. But then you get two more fast non-printing moves (these are very short distances). The 3 sequential moves are basically controlling the path that the printer takes. You _could_ just go straight to the 3rd move position and ignore the intermediary moves … but it may be doing this to move around something or follow a specific path (e.g. if “wiping” or “combing” is enabled.) ---
**Author:** ![TheVirtualTim](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.lulzbot.com/thevirtualtim/32/9965_2.png) [@TheVirtualTim](https://forum.lulzbot.com/u/TheVirtualTim)\ **Post date:** [February 15, 2020, 10:10pm UTC](https://forum.lulzbot.com/t/my-lulzbot-taz-6-loses-connection-to-pc-how-can-i-resume-the-print/20774/11 "2020-02-15T22:10:46Z")
> [@Jason\_Retro](#): > > The additional error I am getting is > > Print setup disabled > G-code files cannot be modified Where are you seeing this error message? ---
**Author:** ![Jason\_Retro](https://avatars.discourse-cdn.com/v4/letter/j/e274bd/32.png) [@Jason\_Retro](https://forum.lulzbot.com/u/Jason_Retro)\ **Post date:** [June 8, 2020, 4:38pm UTC](https://forum.lulzbot.com/t/my-lulzbot-taz-6-loses-connection-to-pc-how-can-i-resume-the-print/20774/12 "2020-06-08T16:38:43Z")
Bottom center of main screen.