How to Resurrection for 3D printers

Hi everybody !

In the process of using a 3D printer I encountered a lot of power problems suddenly lost. My 3D products have to be reprinted from the very beginning. I found out on the network that some lines have function to restore the printing process after a power outage. The Original Prusa I3 MK3, Gyan limited, or WASP delta models. From here I have the idea of writing code back to malirn to save the data when lost to the memory card. That process I have done but for the hardware I have no electronic experience I will describe briefly, you contribute to me on this hardware model so that I can complete it. My 3D printer in Vietnam CGen It is also prusa i3 is also very.

The Duet WiFi and Duet Ethernet controller electronics running RepRapFirmware have this resurrect facility too (https://duet3d.dozuki.com/Wiki/Setting_up_to_resume_a_print_after_a_power_failure). The hardware you need is:

- A mechanism to detect that power is going down. The Duets have this built in. The Prusa uses a separate power detect board that feeds a signal into the main electronics.
- 24V power not 12V, so that sufficient voltage is available to drive the motors for longer.
- A mechanism to turn off the heaters quickly when power failure is detected, to conserve power. The Duets are fast enough to do this in firmware. The processors used in 8-bit electronics are slower and don't provide configurable interrupt priorities, so Prusa has extra circuitry included on the Einsy controller to do that.
- If you save the resume data to SD card, you may need a mechanism to continue to provide power to the processor for several tens of milliseconds after the main power is exhausted. Again, this is built in to the Duet. I don't know whether the Einsy has this too. A large capacitor connected across the processor power rail may be sufficient.

Edited 1 time(s). Last edit at 03/16/2018 12:22PM by dc42.

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Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod

Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].

Quote
dc42
The Duet WiFi and Duet Ethernet controller electronics running RepRapFirmware have this resurrect facility too (https://duet3d.dozuki.com/Wiki/Setting_up_to_resume_a_print_after_a_power_failure). The hardware you need is:

- A mechanism to detect that power is going down. The Duets have this built in. The Prusa uses a separate power detect board that feeds a signal into the main electronics.
- 24V power not 12V, so that sufficient voltage is available to drive the motors for longer.
- A mechanism to turn off the heaters quickly when power failure is detected, to conserve power. The Duets are fast enough to do this in firmware. The processors used in 8-bit electronics are slower and don't provide configurable interrupt priorities, so Prusa has extra circuitry included on the Einsy controller to do that.
- If you save the resume data to SD card, you may need a mechanism to continue to provide power to the processor for several tens of milliseconds after the main power is exhausted. Again, this is built in to the Duet. I don't know whether the Einsy has this too. A large capacitor connected across the processor power rail may be sufficient.

Thanks . I Used 24V power . It work.