Jump to content
Ultimaker Community of 3D Printing Experts

Start of print is clashing with bed clips


Recommended Posts

Posted (edited) · Start of print is clashing with bed clips

Using Cura with an Octoprint connection to a Voxelab Aquila C2. Machine setting is based on an Ender 3 (I have changed the measurements to 220/220 but did also try with the initial 235/235) and I have the Voxelab Aquila profile.

 

When I attempt a print, the extruder returns home to the left front x/y axis and then the bed moves forward so that the extruder clashes with a clip I have on the left side of the bed. This may have even caused damage to the nozzle, which I will shortly replace.

 

However, I am carrying out less accuracy specific prints but not using Cura/Octoprint until I can work out what I need to change to ensure this initial movement does not occur down the left side of the bed. I guess it will be the GCODe start settings but not sure what to change. I expect it is the Move to start position line or Draw the first line as that seems to be moving the Y axis by 20 and attempting to draw a line of 200 (mm I guess?). Should I have a line moving the X axis before that? 

 

; Ender 3 Custom Start G-code

G92 E0 ; Reset Extruder

G28 ; Home all axes

G1 Z2.0 F3000 ; Move Z Axis up little to prevent scratching of Heat Bed

G1 X0.1 Y20 Z0.3 F5000.0 ; Move to start position

G1 X0.1 Y200.0 Z0.3 F1500.0 E15 ; Draw the first line

G1 X0.4 Y200.0 Z0.3 F5000.0 ; Move to side a little

G1 X0.4 Y20 Z0.3 F1500.0 E30 ; Draw the second line

G92 E0 ; Reset Extruder

G1 Z2.0 F3000 ; Move Z Axis up little to prevent scratching of Heat Bed

G1 X5 Y20 Z0.3 F5000.0 ; Move over to prevent blob squish

 

I will also be adding a BLTouch shortly. Does anything need to be added in the start G-code to reflect that?

Edited by stainl36
correcting measurements
  • Link to post
    Share on other sites

    Posted · Start of print is clashing with bed clips

    Hi, you could move the start code purge line further away from the edge/clips by increasing the X-values - currently it draws a line at 0.1mm and a second at 0.4mm (distance to 0=home of X).

    The second option (what i use) is to get rid of this purge line in the start code and use a Skirt (Bluld Plate Adhesion in Cura - I set two lines with a distance of 10mm). This way the purge line is not wasted material if i switch to a brim.

     

    Option 1:

    ; Ender 3 Custom Start G-code with purge line 20mm from the edge

    G92 E0 ; Reset Extruder

    G28 ; Home all axes

    G1 Z2.0 F3000 ; Move Z Axis up little to prevent scratching of Heat Bed

    G1 X20.0 Y20 Z0.3 F5000.0 ; Move to NEW start position

    G1 X20.0 Y200.0 Z0.3 F1500.0 E15 ; Draw the first NEW line

    G1 X20.3 Y200.0 Z0.3 F5000.0 ; Move to side a little

    G1 X20.3 Y20 Z0.3 F1500.0 E30 ; Draw the second line

    G92 E0 ; Reset Extruder

    G1 Z2.0 F3000 ; Move Z Axis up little to prevent scratching of Heat Bed

    G1 X25 Y20 Z0.3 F5000.0 ; Move over to prevent blob squish (added 20)

     

    Option 2:

    ; Ender 3 Custom Start G-code without purge line

    G92 E0 ; Reset Extruder

    G28 ; Home all axes

    G1 Z2.0 F3000 ; Move Z Axis up little to prevent scratching of Heat Bed

    G92 E0 ; Reset Extruder

     

     

    Hope this helps a bit.

     

  • Link to post
    Share on other sites

    Posted · Start of print is clashing with bed clips

    I will give these a go shortly, after a particularly long microsd print is finished (which will house the rasp pi/octoprint). Hopefully get back shortly with results. Thanks

  • Link to post
    Share on other sites

    Posted (edited) · Start of print is clashing with bed clips

    Another thing you might want to do is raise the Z first.  Right now your printer moves in a straight line from point to point.  You may want to insert a couple of other moves to make it an up-and-over.

    G28

    G0 Z15 F2000

    G0 X.1 Y20

    G0 Z.3

    G1 X.1 Y200.0 Z0.3 F1500.0 E15 ; Draw the first NEW line

    Edited by GregValiant
  • Link to post
    Share on other sites

    Create an account or sign in to comment

    You need to be a member in order to leave a comment

    Create an account

    Sign up for a new account in our community. It's easy!

    Register a new account

    Sign in

    Already have an account? Sign in here.

    Sign In Now
     Share

    • Our picks

      • Ultimaker showcase | April 2022 | 4pm CEST | 10am EDT
        I'm excited because I've personally produced this showcase event, so if you are curious what else I'm up to nowadays, come check it out and say hi in the chat! It would mean a lot! 
          • Thanks
          • Like
        • 4 replies
      • New here? Get ahead with a free onboarding course
        Hi,
         
        Often getting started is the most difficult part of any process. A good start sets you up for success and saves you time and energy that could be spent elsewhere. That is why we have a onboarding course ready for
        Ultimaker S5 Pro Bundle, Ultimaker S5, Ultimaker S3 Ultimaker 2+ Connect.   
        They're ready for you on the Ultimaker Academy platform. All you need to do to gain access is to register your product to gain free access. 
        Ready? Register your product here in just 60 seconds.
          • Like
        • 11 replies
    ×
    ×
    • Create New...