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I could use some help

Scheduled Pinned Locked Moved
Duet Hardware and wiring
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  • ?
    A Former User @A Former User
    last edited by 28 Jun 2022, 21:52

    @fcwilt hmmmm, the bed's being weird. I'm sending G1 H1 Y-92 , but the bed is inching towards the end stop instead of going straight for it.

    And Y is now 0.0 again, whereas it was -30.

    ? undefined 2 Replies Last reply 28 Jun 2022, 21:55 Reply Quote 0
    • undefined
      fcwilt @A Former User
      last edited by 28 Jun 2022, 21:54

      This post is deleted!
      1 Reply Last reply Reply Quote 0
      • ?
        A Former User @A Former User
        last edited by 28 Jun 2022, 21:55

        @fcwilt okay, I've gone back to telling the board to move the bed back 10mm at a time (Y-10). It's working again. Y is at -10.0. It's also (I jogged it twice more), about 5mm from the end stop now.

        ? 1 Reply Last reply 28 Jun 2022, 21:57 Reply Quote 0
        • ?
          A Former User @A Former User
          last edited by 28 Jun 2022, 21:57

          @fcwilt I've moved the bed back to the center of the 452mm's. That's 9 inches (of 18). Y is reporting 100.00 now.

          ? 1 Reply Last reply 28 Jun 2022, 21:57 Reply Quote 0
          • ?
            A Former User @A Former User
            last edited by 28 Jun 2022, 21:57

            @fcwilt I have to run an errand. I'll be back in an hour.

            undefined 1 Reply Last reply 28 Jun 2022, 22:01 Reply Quote 0
            • undefined
              fcwilt @A Former User
              last edited by 28 Jun 2022, 22:00

              @mac said in I could use some help:

              @fcwilt hmmmm, the bed's being weird. I'm sending G1 H1 Y-92 , but the bed is inching towards the end stop instead of going straight for it.

              And Y is now 0.0 again, whereas it was -30.

              The change to Y=0 should be because the endstop was triggered.

              The post move behavior of a G1 H1 move is to set the axis position to the min or max value specified in the M208 for that axis.

              Since the endstop for this axis is specified to be at the low end, the min value is used, and that is just what you are seeing.

              Was the move, while slow, smooth and even?

              It could because you did not specify an F parameter for the move. In that case it uses the speed set by the last F parameter that was executed.

              You could try it all again but this time include, say, F3600 in the G1 H1 moves.

              Frederick

              1 Reply Last reply Reply Quote 0
              • undefined
                fcwilt @A Former User
                last edited by 28 Jun 2022, 22:01

                @mac said in I could use some help:

                @fcwilt I have to run an errand. I'll be back in an hour.

                Sounds good. I have a chore to do as well.

                Be safe.

                Frederick

                undefined 1 Reply Last reply 28 Jun 2022, 22:57 Reply Quote 0
                • undefined
                  Nightowl @fcwilt
                  last edited by 28 Jun 2022, 22:57

                  @fcwilt
                  I've got to hand it to you, Frederick. You have tha patience of Job.

                  Few things are more dangerous than taking the advice of someone who thinks he knows what he's doing.
                  I'm still on my learning curve, so take everything I say with caution!

                  RatRig 1075, Duet3 MB6HC, Sorotec SFM 1000 PV-ER milling motor, Hobbyist

                  undefined 1 Reply Last reply 28 Jun 2022, 23:03 Reply Quote 0
                  • undefined
                    fcwilt @Nightowl
                    last edited by 28 Jun 2022, 23:03

                    @nightowl said in I could use some help:

                    @fcwilt
                    I've got to hand it to you, Frederick. You have tha patience of Job.

                    Uh... I like a challenge?

                    Frederick

                    ? undefined 2 Replies Last reply 28 Jun 2022, 23:08 Reply Quote 1
                    • ?
                      A Former User @fcwilt
                      last edited by 28 Jun 2022, 23:08

                      @fcwilt

                      G91
                      G1 H1 Y-220 F3600

                      Send
                      FC869CF0-602B-45C5-AE1C-328E3AC3E21F.jpeg

                      undefined ? 2 Replies Last reply 28 Jun 2022, 23:09 Reply Quote 0
                      • undefined
                        fcwilt @A Former User
                        last edited by 28 Jun 2022, 23:09

                        @mac

                        Hey mac,

                        What am I seeing?

                        Did something work as expected for once? 😉

                        Frederick

                        ? 1 Reply Last reply 28 Jun 2022, 23:27 Reply Quote 0
                        • ?
                          A Former User @A Former User
                          last edited by 28 Jun 2022, 23:23

                          @fcwilt @droftarts @alankilian @Nightowl

                          link text

                          undefined 1 Reply Last reply 28 Jun 2022, 23:27 Reply Quote 0
                          • undefined
                            fcwilt @A Former User
                            last edited by 28 Jun 2022, 23:27

                            @mac said in I could use some help:

                            @fcwilt @droftarts @alankilian @Nightowl

                            link text

                            Hey mac,

                            Nice but G1 H2 is not the same as G1 H1.

                            To make use of the endstop for homing, you have to use G1 H1.

                            Frederick

                            ? 2 Replies Last reply 28 Jun 2022, 23:31 Reply Quote 0
                            • ?
                              A Former User @fcwilt
                              last edited by A Former User 28 Jun 2022, 23:27

                              @fcwilt yep one down, two to go.

                              ? 1 Reply Last reply 28 Jun 2022, 23:40 Reply Quote 0
                              • ?
                                A Former User @fcwilt
                                last edited by 28 Jun 2022, 23:31

                                @fcwilt of course there has to be something weird going on.

                                I changed the H2 to H1. When I hit SEND, the board went back a bit, then stopped. So I sent the instructions 3 more times to get the bed all the way back to the end stop.

                                So H2 makes the bed home as is expected. And H1 does something unexpected.

                                1 Reply Last reply Reply Quote 0
                                • ?
                                  A Former User @A Former User
                                  last edited by 28 Jun 2022, 23:40

                                  @fcwilt the printer's back to its old tricks. It's pounding on the front of the bed when I tell it to home. I'm just trying to get it to do what it did, and it's telling me something I won't write. I'm thinking the same thing towards it.

                                  ? 1 Reply Last reply 28 Jun 2022, 23:47 Reply Quote 0
                                  • ?
                                    A Former User @A Former User
                                    last edited by A Former User 28 Jun 2022, 23:47

                                    @fcwilt I'm having a hard time believing this, but it's true.

                                    I sent G91
                                    Then I wrote G1 H2 Y-220 F2600 (not 3600) (that was just a typo, but I'm not going to change it).
                                    Now the jog menu to the right of Home Y is available. Before, it wasn't. (Like I had to Home Y to get the jog menu to function).
                                    Now, when I use the jog menu to send the bed forwards 50mm, it goes all the way to the front of the printer.
                                    Then, when I send the code again (G1 H2 Y-220 F2600) it goes all the way back to the end stop.
                                    And I see that in the Status box, Y is showing as -220.0

                                    It seems to me that DWC is making shite up, Frederick. What say you?

                                    1 Reply Last reply Reply Quote 0
                                    • ?
                                      A Former User @fcwilt
                                      last edited by 29 Jun 2022, 00:14

                                      @fcwilt I understood what you said, but when I used that code it did not work. Instead, the bed moved towards the end stop, stopped, and I had to push the button again and again to make it get there. But it never did because the firmware said you’re at 0 where you are, and that’s that.

                                      ? undefined 2 Replies Last reply 29 Jun 2022, 00:16 Reply Quote 0
                                      • ?
                                        A Former User @A Former User
                                        last edited by 29 Jun 2022, 00:16

                                        @fcwilt I’m done for today. Did something to my ear that’s killing me.

                                        undefined 1 Reply Last reply 29 Jun 2022, 01:43 Reply Quote 1
                                        • undefined
                                          fcwilt @A Former User
                                          last edited by 29 Jun 2022, 00:25

                                          @mac said in I could use some help:

                                          @fcwilt I understood what you said, but when I used that code it did not work. Instead, the bed moved towards the end stop, stopped, and I had to push the button again and again to make it get there. But it never did because the firmware said you’re at 0 where you are, and that’s that.

                                          I don't know what to say.

                                          You did a series of short G1 H1 moves and they behaved as they should.

                                          But a long G1 H1 move did not.

                                          That suggests a stepper configuration issue.

                                          Frederick

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