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    Topics created by samlogan87

    • samlogan87undefined

      Magnetic Encoder Maximum Cable Length

      Duet Hardware and wiring
      • magnetic encoder • • samlogan87
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      samlogan87undefined

      @dc42 ah bugger. It’s just where I currently have the two boards mounted is inside an electrical part off the side of the printer meaning they would need to be about 650-700mm long. I guess I could move the boards. Just a bit worried about heat as I will be heating the chamber at some stage

    • samlogan87undefined

      1HCL assisted open loop

      Tuning and tweaking
      • 1hcl • • samlogan87
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      dc42undefined

      @samlogan87 here's a guide to how I do tuning for closed loop mode:

      Use a custom tuning move in the closed loop plugin. I use this or similar: G91 G1 H2 X40 F15000 G1 H2 X-40 Set data collection to about 1000 samples/sec. 500 samples will cover the above move. Make sure that the print head is in a suitable place. The move I use returns to the original position so that I can run it repeatedly. Adjust the V and A terms to get the P term closer to zero on average. This applies to full closed loop mode only, not to assisted open loop mode.

      Here's a plot from the plugin with A0 V0 on my test system:

      ac6cbdea-313b-422c-b98e-3a90e9cb69ed-image.png

      The PID control signal is almost entirely made up of the P term (the only other term present is D), which of course means there has to be a significant error present to generate the control signal.

      Here's a plot from the plugin with A200000 V700:

      1ab00dee-0858-45e4-9dce-d5c0bbd12175-image.png

      You can see that the A and V terms are doing most of the work, with the P term doing the fine tuning. The peak error (difference between measured and target motor steps) has reduced from about 3 to about 1 full step. To see the error more clearly, enable the display of Current Error and disable the display of Measured and Target Motor Steps so that the scale expands.

      You can use the D term to supress oscillations in the P term, but if you make D too high then the motor noise may become unpleasant. In both plots I had P40 D0.1. Acceleration in M201 was set to 5000. I get similar results if I increase acceleration to 10000 but then the mechanics sounds clunky.

    • samlogan87undefined

      Duet 3 Strange Issues

      Tuning and tweaking
      • duet 3 • • samlogan87
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      jay_s_ukundefined

      @samlogan87 best post your config and tell us a bit more about your setup

    • samlogan87undefined

      Solved Bad Vibrations through printer

      Tuning and tweaking
      • vibration 1hcl • • samlogan87
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      samlogan87undefined

      Hey everyone,

      Thanks for your help. It has been sorted. I stupidly did not comment out all of my homing files from disabling all of my closed loop stuff.

      Cheers
      Sam

    • samlogan87undefined

      Filament Drying

      3D Printing General Chat
      • filament drying • • samlogan87
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      Norderundefined

      @samlogan87

      Storing Filaments:
      About 5-6 spools of filament are stored in a vacuum bag which also contains some silica gel drying bags and a hydrometer that is clearly visible.
      About 12 filament rolls with nylon and ABS are stored in a large plastic box in which about 2kg of silica gel are scattered at the bottom and are covered with a plastic fly screen so that no silica gel beads get into the filament rolls.

      Filament during printing:
      When I print, the filament roll is placed in a drying oven lying flat. In this drying oven I installed a ball-bearing mounted thread roll in which the filament roll is clamped.
      The filament is guided from the drying oven to the print head in a transparent PTFE tube so that it is never exposed to humidity and dust in the room air.

      The drying oven is insulated inside with 19mm insulating foam (Armaflex) and there are about 15 of these silica gel bags in the bottom of the oven, which keep the humidity low for a long time, so that a filament roll can be stored there for 2-3 days between the prints
      In the lid of the drying oven I made the exhaust air openings variably adjustable and used a hydrometer.
      The dehydrator can heat up to 70°C but I run it on the lowest setting so that it reaches around 45°C.

      Humidity is at best 18% to 25%. If it rises above 35% in the vacuum bags or in the large box, I remove the silica gel and dry it in a dry air fryer, into which a large sieve fits exactly, in which about 1kg of silica gel fits.

      I mostly print ABS and Nylon. Next comes PETG and PLA is last for me.

      Photos of the dehydrator:
      1 / 2 / 3 / 4 / 5 / 6 / 7 / 8

      Google Translate
      --- Original Text ---

      Filamente Aufbewahren:
      Etwa 5-6 Filamentrollen lagern in einem Vakuumbeutel in dem auch einige Silika-Gel Trocknungsbeutel und ein gut sichtbarer Hydrometer liegen.
      Etwa 12 Filamentrollen mit Nylon und ABS lagern in einer großen Kunststoffbox in der unten etwa 2kg Silika-Gel ausgestreut sind und mit einem Fliegengitter aus Kunststoff abgedeckt sind so dass keine Kügelchen des Silika-Gel in die Filamentrollen gelangen.

      Filament während des Druckens:
      Wenn ich drucke, dann kommt die Filamentrolle liegend in einen Dörrofen. In diesem Dörrofen habe ich eine kugelgelagerte Gewinderolle eingebaut in der die Filamentrolle eingespannt wird.
      Das Filament wird aus dem Dörrofen bis zum Druckkopf in einem durchsichtigen PTFE Schlauch geführt so dass es zu keiner Zeit der Luftfeuchtigkeit und dem Staub der Zimmerluft ausgesetzt ist.

      Der Dörrofen ist innen mit 19mm Dämm-Schaumstoff (Armaflex) isoliert und es liegen etwa 15 dieser Silik-Gel Beutel unten im Ofen die die Luftfeuchtigkeit über eine längere Zeit niedrig halten, so dass dort eine Filamentrolle auch mal 2-3 Tage lagert zwischen den Prints.
      Im Deckel des Dörrofen habe ich die Abluftöffnungen variabel einstellbar gemacht und ein Hydrometer eingesetzt.
      Der Dörrofen kann bis 70°C heizen aber ich betreibe ihn auf der niedrigsten Stufe so dass in etwa 45°C erreicht wird.

      Die Luftfeuchtigkeit liegt im besten Fall bei 18% bis 25%. Steigt sie in den Vakuumbeuteln oder in der großen Box über 35% dann entnehme ich das Silika-Gel und trockne es in einer Trockenluftfriteuse wo exakt ein großes Sieb hinein passt in dem etwa 1kg Silika-Gel passt.

      Ich drucke zum größten Teil ABS und Nylon. Danach kommt PETG und PLA liegt bei mir auf dem letzten Platz.

    • samlogan87undefined

      Unsolved 1HCL Issues

      Tuning and tweaking
      • encoders 1hcl • • samlogan87
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      dc42undefined

      @samlogan87 the auto tune function attempts to tune for fastest response. To achieve lower noise, you probably need to use lower R values than the auto tune function suggests. As you are now using 30 and 40, try 15 or 10.

      The forthcoming 3.5.0-beta.3 release allows you to specify a velocity feedforward term in the M569.1 command. That may also hep to reduce noise.

      I will revisit the noise level of closed loop motors later this month/early next month.

    • samlogan87undefined

      1HCL Tuning Issues

      Tuning and tweaking
      • 1hcl closed loop • • samlogan87
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      samlogan87undefined

      @dc42 thanks for your reply. I will try bump it up a bit. It does sometime become unstable however if I increase D. Will play around more. How many oscillations should you be aiming for about setpoint? I have done a bit with PID in pump stations and heating, but nothing with response like this/required accuracy.

      Ok cool. Thanks for explaining. I might talk to Jason and see if he can send me the motors without encoders and will swap them over as he said at some stage he would get 1.8 degree motors sorted.

      Cheers
      Sam

    • samlogan87undefined

      1HCL Closed Loop Issues

      Tuning and tweaking
      • closed loop 1hcl • • samlogan87
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      samlogan87undefined

      Managed to figure it out. In all of my playing around I forgot to change the C parameter back. Now to deal with the tuning as it is sitting there humming

      Sam

    • samlogan87undefined

      Quadrature Encoder with 1HCL

      Duet Hardware and wiring
      • 1hcl encoder • • samlogan87
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      o_lampeundefined

      @samlogan87 IMHO, twisted pair only makes sense for differential signal or a single signal twisted with a GND wire.
      Twisting A and B channel of an encoder could lead to false readings, right?

      IDK the LDO wiring, maybe they did it right?

    • samlogan87undefined

      Input shaping plugin

      Tuning and tweaking
      • • • samlogan87
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      zabanaundefined

      @matthiasweiss not yet as far as I was checking the same, we still need to wait a little bit more😌

    • samlogan87undefined

      Issue using a button to enable a macro

      Tuning and tweaking
      • macros • • samlogan87
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      fcwiltundefined

      @samlogan87

      The macro folder is intended for those bits of code that you want appear in the macro section of the DWC where you can invoke them using the mouse.

      The sys folder is for most everything else.

      Frederick

    • samlogan87undefined

      1HCL board release

      Duet Hardware and wiring
      • • • samlogan87
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      T3P3Tonyundefined

      @samlogan87 hardware is in the order of weeks. Firmware we have one critical thing to test. once that is done I will know more.

    • samlogan87undefined

      Which Duet 3 board to get

      Duet Hardware and wiring
      • • • samlogan87
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      T3P3Tonyundefined

      @samlogan87 said in Which Duet 3 board to get:

      Will 2 of them work at a decent speed off a mini

      Yes 2 will work well using a duet 3 mini.

      By the time we have them available for sale i will have some max step rate comparison figures for you.

    • samlogan87undefined

      RRF3 Config Issues

      Tuning and tweaking
      • rrf3 • • samlogan87
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      deckingmanundefined

      @samlogan87 Off topic I know but yeah, the smoke is pretty bad some days. Had we arrived a day earlier, we wouldn't have been able to get from Melbourne to Canberra because Qantas ground crew in Canberra refused to work in it. My newly arrived grand daughter has been pretty much house bound since she was born. Rain is forecast later this week so hopefully that'll do some good.

    • samlogan87undefined

      Non Planar 3D Printing

      General Discussion
      • non planar • • samlogan87
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      samlogan87undefined

      @deckingman
      Yeah once you set it up it is pretty easy. You just need to measure the clearance height and angle. It is really cool to watch it go. If I was to do it more often, it is pretty limited as to what you can print unless you have that clearance. Still cool anyway

    • samlogan87undefined

      Blobs on Corners

      Tuning and tweaking
      • tuning blobs • • samlogan87
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      JamesMundefined

      Pretty sure they are just the start/stop points of lines(seams). Other than printing in vase mode they are nearly impossible to totally get rid of due to the nature of FDM printing. Things like coast, wipe, pressure advance will all help but when you have molten plastic being laid down in lines that start and stop there's not much that can be done.

      Best thing you can do is properly tune your extruder, filament flow and work with pressure advance.

    • samlogan87undefined

      Magnetic Filament Monitor Calibration

      Filament Monitor
      • magnetic filament monitor calibration • • samlogan87
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      samlogan87undefined

      thanks for your reply @T3P3Tony

      I will use that and see how I go. It makes sense to use the longer one. I did a print last night that had a fair bit of retraction and it only got down to a min 94% and a max of 107% over 9m of filament using the newer mm/rev.

      Sam

    • samlogan87undefined

      Shielded Cable Termination Point

      Duet Hardware and wiring
      • wiring bonding stepper noise • • samlogan87
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      samlogan87undefined

      @bearer

      Sorry I did not read your reply properly. Yes it did fix it by reverting back, however as I was buying a filament monitor, I could not use that firmware.

      Regards,
      Sam

    • samlogan87undefined

      DWC 2.07 doesn’t adhere to move speed limits

      Duet Web Control
      • duet web control • • samlogan87
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      No one has replied

    • samlogan87undefined

      Problems after updating firmware

      Firmware installation
      • update firmware • • samlogan87
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      samlogan87undefined

      I may just get some shielded cable off Ali express and put that in.

      Another though, would ferrite beads work on the endstops to shield noise?

      Kind Regards,

      Sam