Woes of ABS and part warping September 20, 2017 12:52AM |
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Re: Woes of ABS and part warping September 20, 2017 01:44AM |
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Re: Woes of ABS and part warping September 20, 2017 09:19AM |
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Re: Woes of ABS and part warping September 20, 2017 10:11AM |
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Re: Woes of ABS and part warping September 20, 2017 02:04PM |
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Re: Woes of ABS and part warping September 20, 2017 02:57PM |
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Re: Woes of ABS and part warping September 20, 2017 03:32PM |
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Re: Woes of ABS and part warping September 21, 2017 08:41AM |
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Re: Woes of ABS and part warping September 21, 2017 06:49PM |
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Re: Woes of ABS and part warping September 21, 2017 08:16PM |
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Re: Woes of ABS and part warping September 21, 2017 11:16PM |
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Re: Woes of ABS and part warping September 22, 2017 12:56AM |
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Re: Woes of ABS and part warping September 22, 2017 09:44AM |
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Re: Woes of ABS and part warping September 22, 2017 07:56PM |
Registered: 7 years ago Posts: 619 |
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waitaki
You haven't told us what your nozzle gap is set at and if your bed has been truly leveled? Major contributors to print problems if they are not correct.
Re: Woes of ABS and part warping September 23, 2017 03:56AM |
Registered: 10 years ago Posts: 893 |
Re: Woes of ABS and part warping September 23, 2017 04:31AM |
Registered: 11 years ago Posts: 14,685 |
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dlc60
Yes, this is a delta printer, leveling the bed is half hardware and half firmware. Measuring from the tower limit switches to the bed, all are the same. I have adjusted the end effector radius and rod lengths until my three tower points and the center report less than 0.1mm difference, worse case. This is about as level as you can get a delta printer. An incredibly tedious process, this is (in best Yoda voice.)
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dlc60
I plan to improve this even more by replacing my default mechanical switches with optical ones.
Re: Woes of ABS and part warping September 23, 2017 10:13AM |
Registered: 7 years ago Posts: 619 |
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dc42
Quote
dlc60
Yes, this is a delta printer, leveling the bed is half hardware and half firmware. Measuring from the tower limit switches to the bed, all are the same. I have adjusted the end effector radius and rod lengths until my three tower points and the center report less than 0.1mm difference, worse case. This is about as level as you can get a delta printer. An incredibly tedious process, this is (in best Yoda voice.)
It sounds to me that you are very out of date with delta printer technology, probably using old electronics and firmware. With a good Z probe (preferably of the nozzle-contact type) and the right electronics and firmware, calibration is automatic and takes less than 30 seconds. I run it every time I turn the printer on. It doesn't just calibrate the endstop corrections and delta radius, it handles tower position corrections and bed tilt too.
More info at [duet3d.com]. This page is written for Duet electronics, but apart from the detailed calibration instructions, most of the content is relevant to any linear delta printer.
I am a little out of date, but not THAT far. I run an auto bed level using a magnetic zero offset probe I modified from a Thingiverse project. I get a very good first layer that normally needs good leverage to get off the bed. I am using the Marlin firmware that came with the printer whose vintage is unknown since they didn't bother to label or date the source, my guess is at least four years old. I am currently setting up the most recent Marlin from the repo for my printer. There is always a project that gets in the way. I run it at the start of every print. I am using the old traditional Arduino Mega/Ramps 1.4 combo. I have several ChipKIT 32 boards that will use the Ramps board, but have not had the time to port what is certainly an Atmel hardware tied code base to it. The ChipKIT boards are all supported by the Arduino environment, I am sure the Marlin code is tuned and optimized to the ATMega chips, so, nontrivial task ahead. At the moment the Arduino works well enough to move on with, but the thought of a 32 bit platform with hardware math support is very enticing... The duet looks pretty good, but moving to another platform with an entirely new development platform gives one pause.
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dlc60
I plan to improve this even more by replacing my default mechanical switches with optical ones.
Mechanical switches are accurate enough unless they are really bad ones, or used the wrong way.
Re: Woes of ABS and part warping September 25, 2017 07:57PM |
Registered: 7 years ago Posts: 70 |
Re: Woes of ABS and part warping September 26, 2017 12:45AM |
Registered: 7 years ago Posts: 619 |
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number40fan
Sometimes it is the filament that causes the issue. I have a roll of black ABS from Hatchbox that warps like heck on a long run, but the same part with other ABS filaments, does fine.
Try lowering your layer height too. .2427 (yep, weird number, but proven to work with Deltas) and try again.
I have an enclosed printer that I use exclusively for ABS and run the bed at 110° and hotend at 220°. Glass and hair spray.
Are you making a 2040 corner piece or just 2020?
Re: Woes of ABS and part warping September 26, 2017 05:55PM |
Registered: 7 years ago Posts: 70 |
Re: Woes of ABS and part warping September 26, 2017 06:14PM |
Registered: 7 years ago Posts: 619 |
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number40fan
Do you live in the states? I have some injection molded corners from an HE3D delta that I don't need any more. There are 9 pieces in total.
Re: Woes of ABS and part warping September 26, 2017 06:19PM |
Registered: 7 years ago Posts: 619 |
Re: Woes of ABS and part warping September 26, 2017 08:00PM |
Registered: 7 years ago Posts: 70 |
Re: Woes of ABS and part warping September 27, 2017 12:50AM |
Registered: 7 years ago Posts: 619 |
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number40fan
I just looked at your list of tried "fixes", but one that I didn't see was either changing the orientation of the part on the build plate or changing your layer directions. Have you tried any of those?
Re: Woes of ABS and part warping September 28, 2017 04:41PM |
Registered: 7 years ago Posts: 70 |
Re: Woes of ABS and part warping September 28, 2017 04:50PM |
Registered: 7 years ago Posts: 619 |
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number40fan
Yep, that is what I meant. Changing the offsets so they aren't pulling on the effected areas as much.
Re: Woes of ABS and part warping October 02, 2017 01:04PM |
Registered: 7 years ago Posts: 619 |
Re: Woes of ABS and part warping October 02, 2017 06:00PM |
Registered: 11 years ago Posts: 14,685 |
Re: Woes of ABS and part warping October 02, 2017 09:40PM |
Registered: 7 years ago Posts: 619 |
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dc42
What temperature does the chamber reach? Perhaps it's still too low to prevent warping effectively.
Re: Woes of ABS and part warping October 02, 2017 09:58PM |
Registered: 12 years ago Posts: 335 |