Height Map from my updated MarkForged style printer
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A little bit of a follow up on my last.
In looking at my bed mesh below, it would seem that in most cases that the bed anchoring points are stable (bolded cells) where as the area in between the anchor points tends to bow. Granted, I don't consider any of this mesh bad - and it has no visible effect on the parts printed - but as most, I'm always looking to push to the best achievable performance. This is what has me thinking to maybe loosen and then tighten the exterior points while the bed is heat stabilized.
Have either of you seen this before?
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May I ask how this table was generated together with the nice colouring and stuff. Sure beats the standard spreadsheet display. Very easy to look over and see what is going on at a glance!
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@Kolbi said in Height Map from my updated MarkForged style printer:
@fcwilt , @Phaedrux ,
Have either of you had any results, or ideas, on fastening the heated bed while it is cool / vice hot - or vice versa? I was wondering this the other day, expansion and such.As far as I know, the only way to do this that makes sense is a 'compliant mount'. The bed is only fastened rigidly at a single point. all other points allow movement in the x/y plane but not in Z. Typically it is a three point bed mount.
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@jens55 It was pretty easy actually. I took the heightmap data points, copied them and pasted into a next text file and called it bed.csv. Then I opened this in Excel, used conditional formatting for the cell coloring, and then used sparklines for the end of each row. I played around with a few charting options and that data also showed the same displayed findings in this image. I'd say import it into excel and play around with it - kinda fun.
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Very well done ... obviously the 'force' is with you!
My Excel 'foo' is nowhere near that level .... never mind the fact that I use open office in Linux for my spreadsheets.Edit: the bit that shows the graph of the particular row or column is insane - never seen that before !!!
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Cooool ! Thanks!
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@Kolbi said in Height Map from my updated MarkForged style printer:
@fcwilt , @Phaedrux ,
Have either of you had any results, or ideas, on fastening the heated bed while it is cool / vice hot - or vice versa? I was wondering this the other day, expansion and such.I recently switched to these silicone "standoffs" from the traditional springs I used to use.
They seem to work fine. The long term question is will they deform and change height.
As to hot/cold the M3 screws I use go through tapped holes in the heated bed and into M5 clearance holes in the bed support.
I believe that this should accommodate any expansion/contraction.
Frederick
Printers: A FT-5 with the 713 upgrade bits, a custom MarkForged style, a small Utilmaker style, a small CoreXY from kit and a E3D MS/TC setup. Various hotends. Using Duets (2 and 3) running 3.4.6
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@jens55 If OO doesn't show it correctly, let me know and I'll share it as a google doc once I get home.
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@fcwilt @jens55, I have a mk52 style bed like the below pic. I am thinking that I could solidly mount the center, and then use semi-rigid standoffs for the perimeter fixation points.
Thinking about it, I could do a heat stabilized bedmesh, and then while keeping heat on, loosen and re-tighten the perimeters, and perform a second bedmesh - this should let me know if it is actually caused by bowing from heat expansion ....I think...
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@jens55 Did the OO file work?
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Yes it did except it did not display the graphs of the rows and column values which although neat, is not that important to me.
I have not had an opportunity to look at the underlying code yet. -
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It doesn't give me permission to access.
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I now have permission - thanks
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Looking at the code behind the spreadsheet, there seems to be nothing there that sets the colour. Is that something that is done through formatting or similar (ie not on a cell level)?
As you can tell, my spreadsheet foo is very low
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@jens55 No worries, that's called 'conditional formatting' - check this out: https://support.google.com/docs/answer/78413?co=GENIE.Platform%3DDesktop&hl=en
So, if you select all the cells with red/blue/white and do a 'right-click' - you should have a menu pop-up. On the near bottom of the menu should be 'conditional formatting'. Select that and you should see the formatting rule for those blocks on the upper left on the screen. Click on that and you'll see the logic it uses to colorize the cells.
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I don't get the option of the formatting ... probably because the document is read only.
No matter, I have learned a lot. I have also found conditional formatting in OO and will explore things through OO.
Thanks for your help! -
@jens55 No worries, I just a copy of my saved sheet so I changed it to edit enable - give it a shot if you want, can't really hurt anything.
And I just tried loosening the screws and retighten while hot, it didn't really do anything. So I'll probably get brass standoffs, put those on, measure mesh, and lightly sand down offsets until satisfied.
