Hangprinter version 3
Posted by tobben
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Re: Hangprinter version 3 December 28, 2017 06:59PM |
Tobben,
Which is labeled correctly Fig.1 or Fig 2. in the following drawing?
Thank you
Edited 1 time(s). Last edit at 12/28/2017 06:59PM by 3dprintgeek.
Which is labeled correctly Fig.1 or Fig 2. in the following drawing?
Thank you
Edited 1 time(s). Last edit at 12/28/2017 06:59PM by 3dprintgeek.
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Re: Hangprinter version 3 December 29, 2017 02:52PM |
Tobben,
Thank you for that information.
I watched the HP build videos. This is where the questions are coming from as I get ready to document things and create standards I hope will make it easier to understand the build. Below is a poorly constructed image of the anchors. This approximates the way things were laid out when you measured for the calibration. I was really unclear on what was getting measured. Can you explain it here?
Thank you
Edited 1 time(s). Last edit at 12/29/2017 02:54PM by 3dprintgeek.
Thank you for that information.
I watched the HP build videos. This is where the questions are coming from as I get ready to document things and create standards I hope will make it easier to understand the build. Below is a poorly constructed image of the anchors. This approximates the way things were laid out when you measured for the calibration. I was really unclear on what was getting measured. Can you explain it here?
Thank you
Edited 1 time(s). Last edit at 12/29/2017 02:54PM by 3dprintgeek.
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Re: Hangprinter version 3 December 29, 2017 06:39PM |
Seen from above, I measured this (B and C might be mirrored, I don't remember):
As a sanity check, I measured the hypothenuses to the B and C anchors, and compared:
The sanity check was ca 10 mm off in both cases.
torbjornludvigsen.com
As a sanity check, I measured the hypothenuses to the B and C anchors, and compared:
The sanity check was ca 10 mm off in both cases.
torbjornludvigsen.com
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Re: Hangprinter version 3 January 27, 2018 05:50PM |
It's alive! I should be up and printing soon, but everything is mounted and moving.
Hang v3 [imgur.com]
[www.youtube.com]
Edited 1 time(s). Last edit at 01/27/2018 05:52PM by brotherchris.
Hang v3 [imgur.com]
[www.youtube.com]
Edited 1 time(s). Last edit at 01/27/2018 05:52PM by brotherchris.
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Re: Hangprinter version 3 January 27, 2018 07:08PM |
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Re: Hangprinter version 3 February 06, 2018 07:03PM |
If you use the stock Marlin, you can set exactly those things you have changed (radii and #teeth) 
See: [github.com]
If you use good old HangprinterMarlin you will get away with only setting radii, since you kept 1:10 teeth.
You risk getting too much line buildup with so small spools. I recommend the 0.36 mm FireLine instead of the 0.5 mm one. Set spool buildup factor accordingly. Mount as short lines as you can, even if this limits your print volume. (And specify mounted line accordingly.)
When mounted, test carefully that the individual axes feed the exact amount of line that you tell it to feed. This can be done with G1 or torque mode (G95). HangprinterMarlin also has G7 which will take spool buildup into account. G6 will ignore buildup, so it can't be used for testing axes' accuracy.
Looking forward to see your build!
torbjornludvigsen.com
See: [github.com]If you use good old HangprinterMarlin you will get away with only setting radii, since you kept 1:10 teeth.
You risk getting too much line buildup with so small spools. I recommend the 0.36 mm FireLine instead of the 0.5 mm one. Set spool buildup factor accordingly. Mount as short lines as you can, even if this limits your print volume. (And specify mounted line accordingly.)
When mounted, test carefully that the individual axes feed the exact amount of line that you tell it to feed. This can be done with G1 or torque mode (G95). HangprinterMarlin also has G7 which will take spool buildup into account. G6 will ignore buildup, so it can't be used for testing axes' accuracy.
Looking forward to see your build!
torbjornludvigsen.com
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Re: Hangprinter version 3 February 09, 2018 04:33AM |
Hi Chris,
That is just a convention. It is chosen quite at random, but establishing a convention has been useful. It makes possible a sanity check of anchor calibration value signs at compile time (feature in Configuration.h). It also makes it easier to write auto-calibration code that works for everyone. Putting constraints on the non-linear solver, like here, makes it converge faster and in more predictable ways.
Only if we use computer vision in our auto anchor calibration procedure can we throw away conventions about motor order. In that case, we can even put ABC motors on any of the XYZ motor connectors. Not having to track our ABC spools during build would be nice... Let's cheer for @fredrudolf's computer vision work, using PI + PI Cam to calibrate
torbjornludvigsen.com
That is just a convention. It is chosen quite at random, but establishing a convention has been useful. It makes possible a sanity check of anchor calibration value signs at compile time (feature in Configuration.h). It also makes it easier to write auto-calibration code that works for everyone. Putting constraints on the non-linear solver, like here, makes it converge faster and in more predictable ways.
Only if we use computer vision in our auto anchor calibration procedure can we throw away conventions about motor order. In that case, we can even put ABC motors on any of the XYZ motor connectors. Not having to track our ABC spools during build would be nice... Let's cheer for @fredrudolf's computer vision work, using PI + PI Cam to calibrate
torbjornludvigsen.com
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Re: Hangprinter version 3 February 09, 2018 06:34PM |
Thanks for notifying me. The buildup compensation is now back on by default.
The print looks great! Congrats!
So well deserved!
I think your wooden sheet (below the glass sheet in the video) can be a great print bed if you cover it in white glue. It's sometimes easier to distribute a thin layer of glue if you dilute it with a little water first.
torbjornludvigsen.com
The print looks great! Congrats!
So well deserved!I think your wooden sheet (below the glass sheet in the video) can be a great print bed if you cover it in white glue. It's sometimes easier to distribute a thin layer of glue if you dilute it with a little water first.
torbjornludvigsen.com
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