Which 32bit board/firmware to go for? (sorry!) July 12, 2016 07:04AM |
Registered: 8 years ago Posts: 9 |
Re: Which 32bit board/firmware to go for? (sorry!) July 12, 2016 10:46AM |
Registered: 10 years ago Posts: 14,684 |
Re: Which 32bit board/firmware to go for? (sorry!) July 12, 2016 10:54AM |
Registered: 8 years ago Posts: 9 |
Re: Which 32bit board/firmware to go for? (sorry!) July 12, 2016 11:00AM |
Registered: 10 years ago Posts: 14,684 |
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Mr Spangles
Btw, if using a tablet/phone as a controller over the network on this or the 0.8.5 Duet, does that offer all the same or more functionality/control as the PanelDue?
Re: Which 32bit board/firmware to go for? (sorry!) July 12, 2016 11:10AM |
Registered: 8 years ago Posts: 9 |
Re: Which 32bit board/firmware to go for? (sorry!) July 13, 2016 12:40PM |
Registered: 9 years ago Posts: 346 |
Re: Which 32bit board/firmware to go for? (sorry!) July 13, 2016 01:43PM |
Registered: 10 years ago Posts: 14,684 |
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LarsK
I took the duet and have had to learn the hard way that its firmware has close to zero safety precautions. And no plans to change this.
Read my experience here:
Re: Which 32bit board/firmware to go for? (sorry!) July 13, 2016 03:06PM |
Registered: 9 years ago Posts: 346 |
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dc42
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LarsK
I took the duet and have had to learn the hard way that its firmware has close to zero safety precautions. And no plans to change this.
Read my experience here:
LarsK, you are the only person who has experienced anything like that. The caused was because you failed to take proper safety precautions when you assembled your hot end, by (a) failing to secure the heater cartridge, and (b) by leaving the heater wires in a position in which they could snag on the print. Because your heater cartridge only came out after the hot end was up to temperature, the usual safety feature of heat-up timeout did not detect the error.
You are wrong in your assertion that the firmware has close to zero safety precautions. It has three that relate at least in part to the heating: (a) the heat-up timeout, (b) a software watchdog that continuously monitors the thermistor for over-temperature and for a disconnected thermistor, and (c) a hardware watchdog that monitors the software watchdog. However, none of thee will catch the situation of the heater cartridge and the thermistor becoming decoupled after printing temperature has been reached.
I admit that in principle the software could detect temperature abnormalities after initial heating is complete, and I have not said that I have no plans to change the firmware in this respect. I object strongly to being mis-represented. In fact I am looking to replace PID by feed forward temperature control. At that time is will be easier to detect abnormalities in the temperature response very quickly, and I will add a check that the temperature is behaving as expected, with heater shutdown if it is not.
RepRapFirmware is fully open-source, so you can of course add whatever additional precautions you want - with the help of the community if you want.
Re: Which 32bit board/firmware to go for? (sorry!) July 13, 2016 03:50PM |
Registered: 8 years ago Posts: 9 |