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    Choosing correct motor for Delta

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    • Danalundefined
      Danal
      last edited by

      My immediate reaction is to stick with 0.9 motors. They literally, physically, have double the coil/magnet assemblies of a 1.8 motor. No amount of microstepping overcomes that for your stated goal of smoothness.

      The question then becomes: Which motor 0.9 motor? I haven't done research in a couple of years and may not know of something new. When I built my large-ish custom delta, with Duet2, I chose these:

      https://www.sparkfun.com/products/10846

      They have been outstanding on my main "workhorse" printer. 600mm (24 inch) bed.

      BFD Printer.jpeg

      Delta / Kossel printer fanatic

      lord binkyundefined 1 Reply Last reply Reply Quote 0
      • Phaedruxundefined
        Phaedrux Moderator
        last edited by Phaedrux

        https://duet3d.dozuki.com/Wiki/Choosing_and_connecting_stepper_motors

        https://www.omc-stepperonline.com/nema-17-bipolar-0-9deg-46ncm-65-1oz-in-2a-2-8v-42x42x48mm-4-wires-full-d-cut-shaft.html

        These motors pair quite nicely with the Duet 2. I use them on my CoreXY and I know several people are using them on deltas. They are often recommended for just that.

        Electrical Specification
        Manufacturer Part Number: 17HM19-2004S1
        Motor Type: Bipolar Stepper
        Step Angle: 0.9 deg
        Holding Torque: 46Ncm(65.1oz.in)
        Rated Current/phase: 2.0A
        Voltage: 2.9V
        Phase Resistance: 1.45ohms
        Inductance: 4.0mH ± 20%(1KHz)
        Physical Specification
        Frame Size: 42 x 42mm
        Body Length: 48mm
        Shaft Diameter: Φ5mm
        Shaft Length: 24mm
        D-cut Length: 24mm
        Number of Leads: 4
        Lead Length: 500mm
        Weight: 370g
        

        For microstepping on the 2660 it is best to use x16 with interpolation to x256 enabled. This reduces the overhead on the CPU and still has the advantage of x256 smoothness and quietness since the driver sends a full 256 step pulses to the motor.

        Using higher native microstepping on all axis is likely to result in a high hiccup count and possibly missed steps or even complete lockup. And honestly there is no benefit to doing so, especially if you're already using 0.9 degree motors. The one case where it may benefit is ungeared extruders with a low steps per mm.

        Z-Bot CoreXY Build | Thingiverse Profile

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        • wescundefined
          wesc
          last edited by

          I got significantly better layer stacking with my Delta with LDO steppers when i upgraded from OMC (same as ones linked above).

          LDO datasheeet: https://cdn.shopify.com/s/files/1/0239/9287/files/LDO-42STH47-1684MAC_RevA_9f61050a-7275-4b98-a6c5-9f28bd0cb2b7.pdf?172

          Filastruder carries them.

          CroXY - Crossed Gantry Printer, Ultibots D300VS+, Custom CoreXYU

          Phaedruxundefined bartolomeusundefined 2 Replies Last reply Reply Quote 1
          • Phaedruxundefined
            Phaedrux Moderator @wesc
            last edited by

            @wesc That's cool. I've heard good things about LDO motors before.

            Z-Bot CoreXY Build | Thingiverse Profile

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            • Danalundefined
              Danal
              last edited by

              Hmmm.... you guys are going to talk me into an upgrade... hmmm.... 🙂

              Delta / Kossel printer fanatic

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              • bartolomeusundefined
                bartolomeus @wesc
                last edited by

                @wesc said in Choosing correct motor for Delta:

                I got significantly better layer stacking with my Delta with LDO steppers when i upgraded from OMC (same as ones linked above).

                LDO datasheeet: https://cdn.shopify.com/s/files/1/0239/9287/files/LDO-42STH47-1684MAC_RevA_9f61050a-7275-4b98-a6c5-9f28bd0cb2b7.pdf?172

                Filastruder carries them.

                The specs of that motor are almost identical to the E3d high torque motor: https://e3d-online.dozuki.com/Document/wiwQjVSQdCLQT44I/MT-1704HSM168RE.pdf

                Are Motech and LDO the same?

                wescundefined 1 Reply Last reply Reply Quote 0
                • wescundefined
                  wesc @bartolomeus
                  last edited by

                  Are Motech and LDO the same?

                  Could very well be. or could be matched specs and China copying China. Motech and LDO are about 100km apart from each other in China.

                  CroXY - Crossed Gantry Printer, Ultibots D300VS+, Custom CoreXYU

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                  • lord binkyundefined
                    lord binky @Danal
                    last edited by

                    @Danal I use the same Motors on my Rostock max for years now and they've held up quite well for the abuse I did on them. I have looked for lower inductance / inertia 0.9 steppers with good torque but I haven't found one I'm confident will perform better for a decent price (I'm looking at you moons' industries...)

                    If you get a chance, test out my settings I scope tuned for the motors. Mine run 1500ma without getting hot and are as silent as I can expect of them.

                    https://forum.duet3d.com/topic/13028/my-tuned-tmc2660-settings/2

                    oarjjjundefined 1 Reply Last reply Reply Quote 1
                    • oarjjjundefined
                      oarjjj @lord binky
                      last edited by

                      @lord-binky I have moons motors. They’re an old design, same as stepperonline and don’t run any better.

                      Maybe try Lin engineering if you’re looking to spend $50 per motor. Same company, totally different level of support and design. Lin has been around for a long time so lots of used ones out there.

                      lord binkyundefined 1 Reply Last reply Reply Quote 0
                      • lord binkyundefined
                        lord binky @oarjjj
                        last edited by

                        @oarjjj If I'm going to spend that on a motor i would rather get a set of smart steppers

                        1 Reply Last reply Reply Quote 0
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