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    Delta printer start of print extruder coming down too fast.

    Tuning and tweaking
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    • Doc
      Doc last edited by

      Start of print after homing the extruder head on my Delta is coming down way too fast at the start of the print. This printer purchased already assembled with a duet 2 ethernet. First time duet user.

      I can read the config files on the web interface I'm just not sure which F speed I need to adjust , I thought it was the G1 command. Usually these settings are in the slicer but it just has the g28 homing command. Simplify 3D

      Thanks !!

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      • Phaedrux
        Phaedrux Moderator last edited by

        To help us figure out what's happening please post the contents of your config.g, homedelta.g, bed.g and your slicer start gcode or the first 50 lines or so from a sliced gcode file. Also send M122 in the gcode console and post the response.

        Z-Bot CoreXY Build | Thingiverse Profile

        Doc 1 Reply Last reply Reply Quote 0
        • Veti
          Veti last edited by

          you can decrease the maximum global z speed in the M208 command

          like
          M203 X18000.00 Y18000.00 Z18000.00 E1200.00 ; set maximum speeds (mm/min)

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          • Doc
            Doc @Phaedrux last edited by Doc

            This post is deleted!
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            • Doc
              Doc last edited by

              Thx Guys I did find the global section but something in one of the configs is telling it to move at that speed start of the print.

              These manufacturers like to show off so they put these super fast movements when its not needed.

              M92 X160 Y160 Z160
              M906 X1100 Y1100 Z1100 E1100 I40
              M201 X4000 Y4000 Z4000 E4000
              M204 P1000 T4000
              M203 X18000 Y18000 Z18000 E18000
              M566 X1000 Y1000 Z1000 E1200
              M665 L400.290 R228.5 H410 B130 X0 Y0 Z0

              o_lampe 1 Reply Last reply Reply Quote 0
              • o_lampe
                o_lampe @Doc last edited by

                @doc
                I wouldn't reduce z-max speed too much, it gets useful when you use Zhop in retraction moves. (and thereby allow for safer travel moves at 300mm/s and more)
                What you really need is gain confidence in your printers capabilities.

                dc42 1 Reply Last reply Reply Quote 0
                • dc42
                  dc42 administrators @o_lampe last edited by

                  @o_lampe said in Delta printer start of print extruder coming down too fast.:

                  @doc
                  I wouldn't reduce z-max speed too much, it gets useful when you use Zhop in retraction moves. (and thereby allow for safer travel moves at 300mm/s and more)
                  What you really need is gain confidence in your printers capabilities.

                  Z max speed is unlikely to affect the Z hop speed, because the hop is too short to allow it to get anywhere near to Z max speed. OTOH if you reduce max Z acceleration, that will impact the Z hop speed.

                  Duet WiFi hardware designer and firmware engineer
                  Please do not ask me for Duet support via PM or email, use the forum
                  http://www.escher3d.com, https://miscsolutions.wordpress.com

                  alankilian 1 Reply Last reply Reply Quote 1
                  • alankilian
                    alankilian @dc42 last edited by

                    I think the question is:

                    "How does the Duet determine how fast to make a G1 move (with no f parameter) immediately after a G28?"

                    If my last G1 move in homedelta.g has an F300 and I home and then if I enter into the GCODE console a G1 x0 y0 z100 it moves WAY WAY faster than 300.

                    I suspect the "stack" gets pushed before G28 and then gets "popped" after and some unknown speed is activated.

                    SeemeCNC Rostock Max V3 converted to V3.2 with a Duet2 Ethernet Firmware 3.2 and SE300

                    o_lampe 1 Reply Last reply Reply Quote 0
                    • o_lampe
                      o_lampe @alankilian last edited by o_lampe

                      @alankilian @Doc
                      If you really want to slow down the first move, just reduce X,Y,Z max-speed in homedelta.g (or bed.g after probing)
                      Later (in slicer start-gcode) you can allow faster moves

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                      • Doc
                        Doc last edited by

                        THANKYOU for your responses I will try your suggestions

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