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    Scara Problem

    Scheduled Pinned Locked Moved
    Firmware installation
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    • Mauxxundefined
      Mauxx
      last edited by Mauxx

      Exactly, you understand!!! (for communication register i'll check on monday)
      Look also central cube, 2 sides are arc, i don't know why!!!

      JoergS5undefined 2 Replies Last reply Reply Quote 0
      • JoergS5undefined
        JoergS5 @Mauxx
        last edited by

        @Mauxx can you show me what Simplify3D has in his communication window after you made the moves?

        Mauxxundefined 1 Reply Last reply Reply Quote 0
        • JoergS5undefined
          JoergS5 @Mauxx
          last edited by

          @Mauxx Ok. Let's proceed on monday. I'm curious about the reason. I am sure, we will find the reason.

          Mauxxundefined 1 Reply Last reply Reply Quote 0
          • Mauxxundefined
            Mauxx @JoergS5
            last edited by

            @JoergS5 i'll show you on monday, when i go in my "lab"

            1 Reply Last reply Reply Quote 0
            • Mauxxundefined
              Mauxx @JoergS5
              last edited by

              @JoergS5 I hope!!!

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              • Mauxxundefined
                Mauxx
                last edited by

                @JoergS5 everything works except this thing

                JoergS5undefined 1 Reply Last reply Reply Quote 0
                • JoergS5undefined
                  JoergS5 @Mauxx
                  last edited by JoergS5

                  @Mauxx I have an additional idea: (removed, this was not the reason)

                  1 Reply Last reply Reply Quote 0
                  • Mauxxundefined
                    Mauxx
                    last edited by Mauxx

                    I try to work with 800x800 area with 0,0 at centre of tower (X-400,X400; Y-400,Y400) and this problem is in all 4 central axis
                    Probably you're right, so how i can set my config?

                    JoergS5undefined 1 Reply Last reply Reply Quote 0
                    • JoergS5undefined
                      JoergS5 @Mauxx
                      last edited by JoergS5

                      @Mauxx is the angle limit a physical limit or can you change the limit in the configuration?
                      If it's a physical limit, you could place the printer nearer to an edge and/or further away from the print bed. This should give you a bigger print area.

                      For optimal placement I cannot give a recommendation, but it's worth to search, e.g. this document: https://www.researchgate.net/publication/298430720_Optimal_Placement_of_a_SCARA_Robot_-_Lab_Report

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                      • Mauxxundefined
                        Mauxx
                        last edited by

                        @JoergS5 Yes, max angle is physical limit
                        Sorry for my bad english...

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                        • Mauxxundefined
                          Mauxx
                          last edited by

                          @dc42 have you ever encountered this issue?

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                          • Danalundefined
                            Danal
                            last edited by

                            We've all focused on the stuff happening along X while Y=0.

                            None of that explains what happens at 3:10 or so in the video, the move from X90Y220 to X60Y220 also draws an arc. An arc that falls outside the printable area as specified by M208. None of the joints are anywhere near a limit.

                            Delta / Kossel printer fanatic

                            JoergS5undefined 1 Reply Last reply Reply Quote 0
                            • Mauxxundefined
                              Mauxx
                              last edited by

                              it's really very strange
                              thank you all for your help!!!

                              1 Reply Last reply Reply Quote 0
                              • JoergS5undefined
                                JoergS5 @Danal
                                last edited by JoergS5

                                @Danal said in Scara Problem:

                                We've all focused on the stuff happening along X while Y=0.

                                None of that explains what happens at 3:10 or so in the video, the move from X90Y220 to X60Y220 also draws an arc. An arc that falls outside the printable area as specified by M208. None of the joints are anywhere near a limit.

                                That's a valid point. Maybe multiple reasons.

                                My ideas for things to analyze:

                                • the communication log of Simplify3D
                                • belt connection between steppers and Axes: maybe slipping or other problem. Slipping belt could explain curves at strange positions. => one more idea: maybe acceleration and speed too high, so belt starts slipping. You can test setting speed and acceleration lower

                                Is it a toothed belt or a non-toothed one? If it doesn't have teeth, you can check whether the belt slips at the stepper pulley when the printer makes a curve. The pulley itself could slip also (pulley on the stepper axis). You use a method which I know as ServoBelt, this produces high tension, needs high torque and may lead to slipping pulley.

                                @Mauxx which Duet hardware, firmware versions are you using?

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                                • Mauxxundefined
                                  Mauxx
                                  last edited by

                                  Scara give same issue also with Arduino IDE and with RepetierHost draw a Triangle...

                                  I'm sure the belt doesn't slip, i have GT2 toothed Belt

                                  I'm using RRF Lpc on Skr V.1.3 board

                                  When printer draw arc Y motor doesn't move at all

                                  JoergS5undefined 2 Replies Last reply Reply Quote 0
                                  • JoergS5undefined
                                    JoergS5 @Mauxx
                                    last edited by

                                    @Mauxx Maybe the scara code is another one than I checked, because I looked into David's code. Where did you download your firmware RRF LPC code? I will check it then.

                                    Mauxxundefined 1 Reply Last reply Reply Quote 0
                                    • JoergS5undefined
                                      JoergS5 @Mauxx
                                      last edited by

                                      @Mauxx said in Scara Problem:

                                      Scara give same issue also with Arduino IDE and with RepetierHost draw a Triangle...

                                      I'm sure the belt doesn't slip, i have GT2 toothed Belt

                                      What do you mean with triangle?

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                                      • Mauxxundefined
                                        Mauxx
                                        last edited by

                                        When i start print, instead a cube (only in central area) it draw a triangle (half cube)

                                        JoergS5undefined 1 Reply Last reply Reply Quote 0
                                        • JoergS5undefined
                                          JoergS5 @Mauxx
                                          last edited by

                                          @Mauxx I don't understand it, do you have an image?

                                          But more important is, which software you are using, so I can check the source. Do you use the sdavi CoreLPC4 port?

                                          Mauxxundefined 1 Reply Last reply Reply Quote 0
                                          • Mauxxundefined
                                            Mauxx @JoergS5
                                            last edited by

                                            @JoergS5 Thank you very much!!!

                                            for the moment I own Skr Board but am willing to buy a Duet
                                            I just wanted to verify that everything worked properly
                                            I practically tried all the firmware (marlin, smoothie) and RRF is the best !!!

                                            JoergS5undefined 1 Reply Last reply Reply Quote 0
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