moai

Hey guys, I have had an Ender 5 Plus for almost two years now and I didn't have that problem originally, been using Cura the entire time. I did mod in a 32bit board and later a Flex3Drive remote direct drive, had issues with those, finally figuring that out, but unrelated I also had this "triangle" problem and it's not a bad printer, parts, or Cura. It is the Start G-Code in the Cura printer profile machine settings for your specifically added printer in Cura. As many have pointed out, there is no gcode drawing that diagonal line after the initial two purge lines on the front left side. When I first started in 2019 Cura did not have a canned profile pre-loaded for the Ender 5 Plus and I had to add it in manually which means only what I entered (bed dimensions basically) was set. Later I followed some guide and copied in a starting and ending gcode into the Cura printer profile I created for my Ender 5 Plus that came from the Creality demo gcode files. More recently I updated Cura and it does now in fact have a canned Ender 5 Plus profile and I believe the starting and ending gcode is now from them. So you might blame cura, but this is printer tuning. That front-left double purge line comes from the original Creality profiles as I understand. It was then copied into Cura profiles to mimic the stock print job startup behavior and thus behaves similarly. Wel all know Cura slices our print jobs and generates just the right amount of filament to extrude for each printing move incorporating the settings that we spend so much time tuning, but the printer profile start and end gcode is just slapped around Cura's gcode for the current print like bread slices on a sandwich and takes zero cues from the very carefully configured print settings. In Cura go to Settings / Printer / Manage Printers then click on your printer profile then to the right click Machine Settings. Now stretch the settings popup window out so you can see the entire content of the "Start G-Code" and "End G-Code" panes towards the bottom. Below is mine and it's fairly stock. If you don't know Marlin code well, basically the main commands are either MXXX or GXXX, the option triggers and values follow, and often you'll see a semicolon followed by an explanation. Anything after the semicolon is a comment and is just to explain or add a note. M201 X500.00 Y500.00 Z100.00 E5000.00 ;Setup machine max acceleration M203 X500.00 Y500.00 Z10.00 E50.00 ;Setup machine max feedrate M204 P500.00 R1000.00 T500.00 ;Setup Print/Retract/Travel acceleration M205 X8.00 Y8.00 Z0.40 E5.00 ;Setup Jerk M220 S100 ;Reset Feedrate M221 S100 ;Reset Flowrate G28 ;Home M420 S1 Z2 ;Enable ABL using saved Mesh and Fade Height G92 E0 ;Reset Extruder G1 Z2.0 F3000 ;Move Z Axis up G1 X10.1 Y20 Z0.28 F5000.0 ;Move to start position G1 X10.1 Y200.0 Z0.28 F1500.0 E15 ;Draw the first line G1 X10.4 Y200.0 Z0.28 F5000.0 ;Move to side a little G1 X10.4 Y20 Z0.28 F1500.0 E30 ;Draw the second line G1 E28.7 F2400; retract 1.3mm after test lines to not string before print G92 E0 ;Reset Extruder G1 Z2.0 F3000 ;Move Z Axis up The standard E5P purge line starts in the last section at the second G1 command where it tells the printer to: 1. move nozzle to the front left (X10.1mm and Y 20mm set Z to 0.28 all with a feedrate aka speed of 5000mm/s) 2. move and extrude to X10.1mm Y200mm (180mm) and extrude 15mm of filament (E15 which is absolute counting) 3. move and extrude back to x10.1mm and Y 20mm (another 180mm) and extrude another 15mm of filament (E30) With absolute positioning from zero E15 means extrude 15 mm of filament according to the calibrated esteps, E30 means extrude ANOTHER 15 mm of filament, and E28.7 means RETRACT 1.3mm of filament. I have a customized direct drive so 1.3mm is where I am in tuning right now. As you can see I added in the line: G1 E28.7 F2400; retract 1.3mm after test lines to not string before print My customized Flex3Drive and I are finally starting to get along and I'm not done with this 3rd generation of tweaks and complete retunings, so don't think that retraction and feedrate is any ideal setting for all Ender 5 Plus printers, but hopefully it will help you all eliminate your "triangle" line at the start up. As I recall my stock E5P extruder retraction was like 6.5mm so if you wanted to try adding the following line after that 2nd purge test line it would get you close to eliminating your triangle line. Also if you set your Cura slicer settings to start each layer at the Front Left it would minimize any stringing you did have so that at least it doesn't string across the entire print before the first layer starts printing. G1 E23.5 F2400; retract 6.5mm after test lines to not string before print I'm not a pro, but I did figure this out, hope this helps.