Re: Marlin4Due June 03, 2015 06:38PM |
Registered: 9 years ago Posts: 4,977 |
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AndrewBCN
@ Wurstnase
Hi,
I have just checked the datasheets for both the A4988 and the DRV8825, they require respectively a 1uS minimum low and 1uS minimum high pulse width (A4988 datasheet), and 1.9uS minimum low and 1.9uS minimum high pulse width (DRV8825 datasheet).
On a 16MHz AVR MCU, these minimum pulse widths are easy to get/respect, but on an 84MHz ARM Cortex M3 MCU, you have to pay more attention to how you code this.
So I agree with you, the latest fastio.h on Marlin4Due will possibly be too fast, an analysis of the compiled assembler code would confirm this.
There is a DelayMicroseconds() function in the Arduino libraries, I am not sure what the shortest delay it is able to generate on a Due is, this would have to be investigated further.
So apparently this problem is not as easy to solve as it looks like at first glance.
Triffid Hunter's Calibration Guide | --> X <-- Drill for new Monitor | Most important Gcode. |
Re: Marlin4Due June 03, 2015 06:58PM |
Registered: 9 years ago Posts: 977 |
Re: Marlin4Due June 03, 2015 08:39PM |
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Re: Marlin4Due June 03, 2015 09:39PM |
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Re: Marlin4Due June 04, 2015 12:26AM |
Registered: 9 years ago Posts: 4,977 |
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tadawson
Any chance to look at the inverted fan issue yet?
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3DLTech
I just loaded most recent Marlin4Due files. It doesn't stop compiling, its in some sort of endless do loop.
Triffid Hunter's Calibration Guide | --> X <-- Drill for new Monitor | Most important Gcode. |
Re: Marlin4Due June 04, 2015 07:17PM |
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Re: Marlin4Due June 05, 2015 02:40AM |
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Triffid Hunter's Calibration Guide | --> X <-- Drill for new Monitor | Most important Gcode. |
Re: Marlin4Due June 05, 2015 03:58AM |
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Triffid Hunter's Calibration Guide | --> X <-- Drill for new Monitor | Most important Gcode. |
Re: Marlin4Due June 05, 2015 12:27PM |
Registered: 9 years ago Posts: 4,977 |
Triffid Hunter's Calibration Guide | --> X <-- Drill for new Monitor | Most important Gcode. |
Re: Marlin4Due June 07, 2015 01:41AM |
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Re: Marlin4Due June 17, 2015 12:35AM |
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Re: Marlin4Due June 17, 2015 09:37AM |
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Triffid Hunter's Calibration Guide | --> X <-- Drill for new Monitor | Most important Gcode. |
Re: Marlin4Due June 18, 2015 01:39AM |
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Re: Marlin4Due June 19, 2015 04:59PM |
Registered: 9 years ago Posts: 396 |
Re: Marlin4Due June 19, 2015 11:12PM |
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Re: Marlin4Due June 22, 2015 03:06PM |
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Re: Marlin4Due June 22, 2015 03:07PM |
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Re: Marlin4Due June 23, 2015 07:59AM |
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Triffid Hunter's Calibration Guide | --> X <-- Drill for new Monitor | Most important Gcode. |
Re: Marlin4Due June 24, 2015 04:43PM |
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Re: Marlin4Due July 06, 2015 09:52PM |
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Re: Marlin4Due March 19, 2016 12:49PM |
Registered: 8 years ago Posts: 75 |
Re: Marlin4Due August 15, 2017 10:32AM |
Registered: 9 years ago Posts: 159 |
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Wurstnase
Hi all,
I spend last weeks a lot of time. And now most parts works.
Marlin4Due works with RADDS (also the RADDS-Display with the Back-Button) and also should work with RAMPS-FD V1/V2 (but not tested!).
All the extras which are new in the main-fork are implemented in Marlin4Due.
- Delta Autobedleveling
- up to 4 Extruders
- Filamentsensor
- improved Autobedleveling (G29 RLFB P V) for cartesian printers
- and many other things...
Have fun with it.
Many thanks to bobc for a great starting point!
Also many thanks to all Marlin-developers!
Re: Marlin4Due August 15, 2017 10:35AM |
Registered: 9 years ago Posts: 159 |
Re: Marlin4Due August 25, 2017 03:52PM |
Registered: 9 years ago Posts: 4,977 |
Triffid Hunter's Calibration Guide | --> X <-- Drill for new Monitor | Most important Gcode. |