CR-10 S5 AC Hot Bed Control Cabinet with Thermal Protection (Home Assistant)
Description
CR-10 S5 AC Hot Bed Control Cabinet with Thermal Protection (Home Assistant) CAUTION: It is advised to get a qualified person to do any electrical work. Version 1: 8 Amp IEC Connector - for smaller heated beds that draw 8 amps or less. Version 2: 12 Amp IEC Connector - for larger beds that draw 8 to 12 amps I designed this out of need for one. I haven't found anything else for this function. This provides thermal runaway protection for the AC silicone heaters for the printers build platform. The temperature of the bed is actually controlled through the printer. There are heaters available that have the temperature controller built in-line but I thought that would be inconvenient as I wanted to control the temperature through the printer controller and Octoprint. The temp controller here is setup to cool so as the temperature starts to get close to the set point (max temp you desire the bed to reach; i.e. 100c plus) it start to take control.It does this through a relay on the AC or Line voltage side, not the DC printers side. This might happen if the printer controls have failed, a thermistor has gone bad and reading low, or even the Solid State Relay has failed closed (shorted). This will help prevent a severe overheating problem and possibly a fire. I designed this around the CR-10 S5 mounted in the back, underneath on the 2040 rail. It may fit other printers but I don't have them to test fit. Sorry. The circuits will work with other printers if you want to retrofit something. Home Automation Option: I have mine set up with Home Assistant home automation software. I have a smart outlet on the power cord for the Hot Bed cabinet and a D1Mini inside the cabinet. I run Tasmota running on the D1Mini, the alarm output of the temp controller is run to the D1Mini as a switch input. The temp controller alarm is set to Deviation mode with a 5 degree temperature setting. If the temperature reaches 5 degrees above the set point then the alarm trips, the D1Mini then sends a message through the MQTT protocal over WIFI to Home Assistant. Home Assistanty sees an Unsafe condition and turns off the smart outlet, killing power to the hot bed. This adds additional protection. Parts Required: Adjustable Feet, 75mm or taller: - https://www.thingiverse.com/thing:3874584 Temperature Controller - SOLO SLB4848-R2 single-loop temperature controller, 1/16 DIN, 2-line LCD, RTD or thermocouple input, (1) 5A SPST relay, (2) 3A SPST relays output, 100-240 VAC operating voltage.-R2 https://www.automationdirect.com/ 30amp Relay - American Zettler Power Relay, SPDT, 30A, 115v, Mini, 30A SPDT 120VAC AZ2280-1C-120A( Pack of 2) Solid State Relay - Solid State Relay and Heat Sink SSR 40amp 40DA 3-32V DC / 24-380V AC Cooling Fan - GDSTIME EC Cooling Fan 60mm x 60mm x 25mm AC 110V 115V 120V 220V 240V Dual Ball Bearings Case Fan Dust Filter - BQLZR 60mm Black Plastic Dustproof Case Fan Dust Filter Guard Grill Protector Cover PC Computer Pack of 5 Terminal Block - Qishare 15 Pcs Dual Row 6 Position Screw Barrier Terminal Block 600V 15A + 400V 15A 6 Postions Pre Insulated Terminal Barrier Strip Red/Black 10 Pcs (15A 6P) Rocker Switch Power Inlet Module 8 Amps Max- BIQU 15A 250V Rocker Switch Power Socket Inlet Module Plug 5A Fuse Switch with 5Pcs 16-14 AWG Wiring 3 Pin IEC320 C14 Rocker Switch Power Inlet Module 12 Amps Max- TE CONNECTIVITY / CORCOM 15CE1 Power Entry Connector, C Series, Plug, 250 VAC, 15 A, Panel Mount, Quick Connect From Newark Element 14 (https://www.newark.com/) Newark Part No.: 60R5552 Power Cord - StarTech.com 14 AWG Computer Power Cord - NEMA5-15P to C13 - Power Cable - IEC 60320 C13 to NEMA 5-15 (M) - 10 ft - Black - PXT1011410 K-Type Surface Mount Thermocouple - PerfectPrime TL0225, Surface Contact,0.25 mm diameter, K-Type Sensor Probe with Sticker for K-Type Thermocouple Thermoemter/Meter, Temperature Range up to 200 °C/ 392°F K-Type Thermocouple Panel Mount Connector - MPJ-K-F - Thermocouple Connector, MPJ Series, Panel Jacks, Miniature, Type K, Socket from (https://www.newark.com/ Newark Part No.: 31AC5607) Cable Strain Relief: - uxcell PG11 Waterproof Nylon Cable Gland Joint Adjustable Connector Shrink Tubing of various sizes M3, M4, and M5 cap screws Standalone Cabinet Additional Parts: Feet for cabinet - Small Round Rubber Feet W/Screws - .250 H X .671 D Optional Equipment: D1Mini Node MCU - MakerFocus 2pcs D1 Mini NodeMcu 4M Bytes Lua WiFi Development Board Base on ESP8266 ESP-12F N Compatible NodeMcu Arduino 5vdc Microusb power supply - 2-Pack 5V 2A Micro USB Power Supply Adapter for Security Camera Raspberry Pi and More by Security-01 Smart Outlet - Leviton DZPA1-2BW Decora Smart Plug-in Outlet with Z-Wave Technology, White, Repeater/Range Extender Equipment Instructions: Assemble the components and wire as to the schematic provided. Optional Equipment Instructions: The power 5VDC power supply for the D1Mini will need to the case split and the circuit board removed. I unsoldered the usb cable, cut it shorter and resoldered it. The AC line cables, the ones from the board to the outlet prongs, were replaced with 18awg THHN wires to be able to reach the terminal block. For the most recent updates on my projects, join my group: https://www.facebook.com/groups/3DPrinterModding/
Statistics
Likes
13
Downloads
0