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    robinS3

    @robinS3

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    Best posts made by robinS3

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    Latest posts made by robinS3

    • RE: Problems with setting up

      @dc42
      M558 set to p1, F200
      G1 set to p500
      M201 has Z15
      IR sensor is about a year old but only 6 months in service.

      The results I posted were all repeated at the same point (and today are ranged about 2.42 rather than 3.? I got three results within the same 0.5mm, nowhere near your 0.01

      mechanics, I have an M8 rod, an old RepRapStore model Prusa) and there is a bit of Z wobble. I modified the Z axis to put the drives at the bottom, with the flexible connections (from E3D) mounted on deep groove bearings to reduce the load on the Z axis motors.

      posted in Tuning and tweaking
      robinS3
      robinS3
    • RE: Problems with setting up

      @phaedrux Done that. Same sort of results with plain white paper. I shall try it again later with coloured paper in case the white overloaded the sensor.

      posted in Tuning and tweaking
      robinS3
      robinS3
    • RE: Problems with setting up

      @dc42 " Did you read the upgrade notes, which I advise users to do on every Releases page that I publish? You need to read the upgrade notes for the released you skipped too."

      I try to do so, but I am not sure I interpret what you meant me to understand. I often find myself looking at results, going back to the notes and thinking, " Ah, that's what he meant" My brain doesn't seem to work as people expect!

      "It suggests that your X axis is sagging in the middle. "
      it seems to affect the Y axis much more. I know that the DTI shows every touch , and I was playing with the effect of putting an AAA battery cell on the bed. the deflection registered.

      posted in Tuning and tweaking
      robinS3
      robinS3
    • RE: Problems with setting up

      @phaedrux "But Since g30 is only accurate once"
      I'm not sure what you mean

      Ive just spent some time following the instructions for setting up the Z probe on a kaptan covered glass bed

      I repeated the G30 S-1 several times and got the following results
      3.309,3,392, 3.665, 3.179, 3.583.

      Yesterday when I did similar the results were scattered between 2.7 and 2.3.

      What I usually do is to repeat g30 until I get three readings inside the same tenth, eg:2,55, 2.57.2.51, but by the end of a print, a return to G30 can be significantly off, even if the print itself is only hundreths of an mm of the programmed size. So the probe will report it has returned to a similar height, but manual checking with a height gauge can show an error up to about 1 mm. the probe seems tight on its mount, otherwise I would suspect that somewhere the probe had collided with something and moved.

      posted in Tuning and tweaking
      robinS3
      robinS3
    • Problems with setting up

      Firmware Name: RepRapFirmware for Duet
      Firmware Electronics: Duet 0.6
      Firmware Version: 1.23 (2018-12-24b1)
      Web Interface Version: 1.22.6

      So as an Xmas present I updated from something older on my Duet powered Prusa and found that quite a lot of the behaviour had changed:

      When trying to home X or Y (after an M84 or on start up) the system told me that not enough axes had been homed. Eventually I had to manually set Z via a G92,

      Then G30 returns to approximately 5mm after finding the bed, but since G30 is only accurate once ( the variation can be 0.3mm between probings for at least the first five probes on the same spot, it requires a manual operation to accurately set 0.

      M557 doesn't seem to work. If I send M557 X20:180 Y20:180 S20 as a Gcode, then check it from the auto bed compensation panel it remains set at x0:180 Y0:180. If I set it manually from teh auto bed compensation panel, then the cset condition persists.
      Run Mesh Grid compensation works from the panel but the results are unpredictable (especially on the black PEI bed) where it suddenly dived into the deck and broke the glass, which means a new PEI sheet, new Glue sheet and new Glass.

      I thought I had followed the advice on tuning the Mini IR probe, but there is obviously somethng missing and on a Kaptan covered bed the system has just stripped the film off for the third time as it seems to compensate for a height variation that just doesn't seem to be there.

      Does anyone have any ideas what is going wrong?

      At he same time, even with bed compensation, and after extensive manual bed levelling, the micrometer shows a 4 thou hollow in thecentre of the bed, even with a brand new bit of glass that is flat when measured on the mill, even if I then turn the glass over expecting to find a bulge. (and even if there is no bulldog clip to apply warp. Is this an indication that the X and Y travel guides are bent from too many head crashes? Or have I discovered micro-gravitic anomalies?

      Any help would be welcome, I' d like print something over 20mm successfully soon after three years of trying!

      Rs3

      posted in Tuning and tweaking
      robinS3
      robinS3