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Topics created by j3d

  • undefined

    SD card read speed on Duet 3 Mini 5+ lower than write?

    Duet Hardware and wiring
    • • 4 Nov 2021, 01:41 • j3d 4 Nov 2021, 14:49
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    undefined 4 Nov 2021, 14:49

    @j3d the reason is that we want file uploads to be as fast as possible, and SD cards prefer large block writes; so RRF uses a 8K write buffer. In contrast, it's rare to download files from the Duet, and other file reads from the SD card don't need large blocks of data in one go; so RRF uses much smaller read buffers.

  • undefined

    M955 fails on 3.4.0beta5

    Beta Firmware
    • • 4 Nov 2021, 01:30 • j3d 6 Nov 2021, 12:07
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    undefined 6 Nov 2021, 12:07

    @j3d thanks for reporting that. I'm changing things in 3.4.0beta6 so that a power pin will not be assigned by default, and so io4.out will be free.

  • undefined

    Extruder whirring after Maestro to Mini 5+ upgrade

    Duet Hardware and wiring
    • • 9 Mar 2021, 02:10 • j3d 10 Mar 2021, 05:06
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    undefined 10 Mar 2021, 05:06

    since your motors are rated at 0.8A they will get hot when you run them at at.
    reduce the current to about 75% of the rated current.

    also for extruder i found that spreadcycle produces better results.

    i run all my stepper in stealthchop except the extruder.

  • undefined

    Mesh probe movement optimization

    Firmware wishlist
    • • 9 Mar 2021, 00:32 • j3d 21 Mar 2021, 18:38
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    undefined 21 Mar 2021, 18:38

    @DanS79

    ; deployprobe.g
    ; called to deploy a physical Z probe

    M280 P0 S10
    G4 P200

    wait for it to be deployed
    as Z Endswitch i use 2000 on mesh 1000

  • undefined

    Loud z axis motor irrespective of micro-stepping

    Duet Hardware and wiring
    • • 7 Mar 2021, 00:57 • j3d 9 Mar 2025, 03:40
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    undefined 9 Mar 2025, 03:40

    @o_lampe OMG I switched from a duet 2 to a 3 mini 5+ and this was driving me mad. This setting makes the ffcp run so quiet i can't even tell it's moving. TY!

  • undefined

    Unsolved Maestro issues (Firmware not updating and no ethernet)

    Duet Hardware and wiring
    • • 8 Jan 2021, 02:26 • j3d 14 Jan 2021, 15:53
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    undefined 14 Jan 2021, 15:53

    @Phaedrux I have sent off an email, yes.

  • undefined

    Confusion on M558 for Duet Maestro with RRF3

    IR Height Sensor
    • • 12 Dec 2020, 23:47 • j3d 16 Dec 2020, 07:46
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    undefined 16 Dec 2020, 07:46

    C1 is intentionally not fitted.

    I am glad you found the problem. Soldering the side-looking IR receiver can indeed be a problem because of the unusual location of the pads, and that is the first thing we check when a sensor doesn't respond to a nearby surface.

  • undefined

    Connecting 6-lead unipolar steppers (Full or half coil)?

    Duet Hardware and wiring
    • • 8 May 2019, 20:20 • j3d 9 May 2019, 13:05
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    undefined 9 May 2019, 13:05

    @j3d, which is best depends on the inductance of the motors and the VIN voltage. Do you have the motor specifications?

  • undefined

    Maestro hardware decisions

    General Discussion
    • • 8 May 2019, 02:47 • j3d 9 May 2019, 06:50
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    undefined 9 May 2019, 06:50

    and there are 5v noctua fans which can be connected directly to the duet. even better there are 5v pwm noctua fans.

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