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I could use some help

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Duet Hardware and wiring
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  • undefined
    fcwilt @A Former User
    last edited by 28 Jun 2022, 03:55

    @mac said in I could use some help:

    @fcwilt I haven't even started measuring again. I did turn the printer off so I could move the bed back to the end-stop. I'd like to use that 0-point to measure from. But getting to it is brutal!

    Understood.

    And it's true that the longer move you measure the less slight inaccuracies in the measurement will affect the results.

    One good measurement is all you should need to verify the the Y setting of 100 in the M92 command is the correct value for your printer.

    At least my mistake with G92 was corrected in time and you didn't get messed up by it. That's a relief.

    Frederick

    Printers: a small Utilmaker style, a small CoreXY and a E3D MS/TC setup. Various hotends. Using Duet 3 hardware running 3.4.6

    1 Reply Last reply Reply Quote 0
    • ?
      A Former User @A Former User
      last edited by A Former User 28 Jun 2022, 04:03

      @fcwilt OKAY, I've moved the bed back, right to the point where the endstop clicks. I've taped the metal ruler to the frame. The beginning of the measure is absolutely lining up with the very back of the metal bed.

      So, I had to Home Y to get the machine movement points back. The bed was already right at the switch, but it decided to pound on the motor for a bit, then it stopped.

      With the movement buttons back, I jogged the bed forwards 10 times (Y+10 each time). The front of the bed is at 12 and 7/8 right now. If it had started at the endstop, I think it would be at 13 inches exactly right now.

      ? undefined 2 Replies Last reply 28 Jun 2022, 04:07 Reply Quote 0
      • ?
        A Former User @A Former User
        last edited by 28 Jun 2022, 04:07

        @fcwilt 13 inches of travel is 300mm. We're talking round numbers, Frederick!

        1 Reply Last reply Reply Quote 0
        • undefined
          fcwilt @A Former User
          last edited by fcwilt 28 Jun 2022, 04:07

          @mac said in I could use some help:

          @fcwilt OKAY, I've moved the bed back, right to the point where the endstop clicks. I've taped the metal ruler to the frame. The beginning of the measure is absolutely lining up with the very back of the metal bed.

          So, I had to Home Y to get the machine movement points back. The bed was already right at the switch, but it decided to pound on the motor for a bit, then it stopped.

          With the movement buttons back, I jogged the bed forwards 10 times (Y+10 each time). The front of the bed is at 12 and 7/8 right now. If it had started at the endstop, I think it would be at 13 inches exactly right now.

          I really don't quite understand what you did but that doesn't matter as long as...

          You are satisfied that the Y value of 100 for M92 in the config.g file is correct.

          If you are we can proceed to measure the Y axis.

          Frederick

          Printers: a small Utilmaker style, a small CoreXY and a E3D MS/TC setup. Various hotends. Using Duet 3 hardware running 3.4.6

          ? 1 Reply Last reply 28 Jun 2022, 04:08 Reply Quote 0
          • ?
            A Former User @fcwilt
            last edited by 28 Jun 2022, 04:08

            @fcwilt It makes sense, let's go with it.

            undefined ? 2 Replies Last reply 28 Jun 2022, 04:10 Reply Quote 0
            • undefined
              fcwilt @A Former User
              last edited by fcwilt 28 Jun 2022, 04:10

              @mac said in I could use some help:

              @fcwilt It makes sense, let's go with it.

              OK

              This is next.

              To use jogging of Y to measure the max travel of Y is simple:

              • execute M564 H0 S0 (from the DWC console is fine) so you can jog the entire axis without being limited by the current M208 limits
              • jog the bed as far back as possible
              • execute G92 Y0
              • jog the bed as far forward as possible
              • read the current Y position as displayed by the DWC

              When jogging near the ends try to "sneak" up on the ends so you don't over shoot them. The firmware will think the move happened even if the bed stayed still.

              Frederick

              Printers: a small Utilmaker style, a small CoreXY and a E3D MS/TC setup. Various hotends. Using Duet 3 hardware running 3.4.6

              1 Reply Last reply Reply Quote 0
              • ?
                A Former User @A Former User
                last edited by 28 Jun 2022, 04:11

                @fcwilt I'm going to follow your instructions, and I'll report them to you as soon as I have them. Just hang on, we'll get there.

                ? 1 Reply Last reply 28 Jun 2022, 04:15 Reply Quote 0
                • ?
                  A Former User @A Former User
                  last edited by 28 Jun 2022, 04:15

                  @fcwilt Y is EXACTLY 350!

                  undefined ? 2 Replies Last reply 28 Jun 2022, 04:16 Reply Quote 1
                  • undefined
                    fcwilt @A Former User
                    last edited by 28 Jun 2022, 04:16

                    @mac said in I could use some help:

                    @fcwilt Y is EXACTLY 350!

                    Does it seem possible that the bed actually moved 350mm?

                    Frederick

                    Printers: a small Utilmaker style, a small CoreXY and a E3D MS/TC setup. Various hotends. Using Duet 3 hardware running 3.4.6

                    1 Reply Last reply Reply Quote 0
                    • ?
                      A Former User @A Former User
                      last edited by 28 Jun 2022, 04:17

                      @fcwilt THE FRONT OF THE BED IS AT 18 INCHES FROM WHERE IT STARTED.

                      ? 1 Reply Last reply 28 Jun 2022, 04:18 Reply Quote 0
                      • ?
                        A Former User @A Former User
                        last edited by 28 Jun 2022, 04:18

                        @fcwilt 18 inches is 457.2 mm.

                        ? 1 Reply Last reply 28 Jun 2022, 04:20 Reply Quote 0
                        • ?
                          A Former User @A Former User
                          last edited by 28 Jun 2022, 04:20

                          @mac ![alt text](FBD3A47D-8359-4529-AE5C-3603EFE8BAA0.jpeg 7060EEA5-5D54-44D0-8C3F-35E20D3135B6.jpeg image url)

                          ? 1 Reply Last reply 28 Jun 2022, 04:22 Reply Quote 0
                          • ?
                            A Former User @A Former User
                            last edited by A Former User 28 Jun 2022, 04:22

                            @fcwilt The bed started at 0 inches, and travelled to 18 inches. DWC called it 350.0. It's 18 inches. All of the numbers are whole numbers. We're golden.

                            1 Reply Last reply Reply Quote 0
                            • undefined
                              fcwilt
                              last edited by 28 Jun 2022, 04:22

                              @mac said in I could use some help:

                              @fcwilt THE FRONT OF THE BED IS AT 18 INCHES FROM WHERE IT STARTED.

                              But 18 inches is 457.2 mm - how is that possible?

                              Frederick

                              Printers: a small Utilmaker style, a small CoreXY and a E3D MS/TC setup. Various hotends. Using Duet 3 hardware running 3.4.6

                              ? 1 Reply Last reply 28 Jun 2022, 04:23 Reply Quote 0
                              • ?
                                A Former User @fcwilt
                                last edited by 28 Jun 2022, 04:23

                                @fcwilt I have an inches to metric calculator doing that for me.

                                ? undefined 2 Replies Last reply 28 Jun 2022, 04:23 Reply Quote 0
                                • ?
                                  A Former User @A Former User
                                  last edited by 28 Jun 2022, 04:23

                                  @fcwilt link text

                                  ? 1 Reply Last reply 28 Jun 2022, 04:25 Reply Quote 0
                                  • undefined
                                    fcwilt @A Former User
                                    last edited by 28 Jun 2022, 04:25

                                    @mac said in I could use some help:

                                    @fcwilt I have an inches to metric calculator doing that for me.

                                    No I mean if the bed actually moved 18 inches which is 457.2 mm the DWC should read the same 457.2 mm, assuming the DWC was reading 0 when you started. Which is should have since you execute G92 Y0.

                                    Frederick

                                    Printers: a small Utilmaker style, a small CoreXY and a E3D MS/TC setup. Various hotends. Using Duet 3 hardware running 3.4.6

                                    ? 1 Reply Last reply 28 Jun 2022, 04:26 Reply Quote 0
                                    • ?
                                      A Former User @A Former User
                                      last edited by 28 Jun 2022, 04:25

                                      @fcwilt maybe the question is, what is the relationship between DWC reporting 350, and my metal measuring stick reporting 18 inches?

                                      undefined 1 Reply Last reply 28 Jun 2022, 04:25 Reply Quote 0
                                      • undefined
                                        fcwilt @A Former User
                                        last edited by 28 Jun 2022, 04:25

                                        @mac said in I could use some help:

                                        @fcwilt maybe the question is, what is the relationship between DWC reporting 350, and my metal measuring stick reporting 18 inches?

                                        When converting inches to mm the DWC should read out what you measured.

                                        Frederick

                                        Printers: a small Utilmaker style, a small CoreXY and a E3D MS/TC setup. Various hotends. Using Duet 3 hardware running 3.4.6

                                        1 Reply Last reply Reply Quote 0
                                        • ?
                                          A Former User @fcwilt
                                          last edited by 28 Jun 2022, 04:26

                                          @fcwilt we have to subtract the depth of the bed!!!!! Which is 220. I'm getting 247?

                                          ? undefined 2 Replies Last reply 28 Jun 2022, 04:26 Reply Quote 0
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