Mains Voltage Electronics - TechforTrade/Thunderhead-Filament-Extruder GitHub Wiki
The mains voltage electronics have been separated from the low voltage electronics to reduce noise in the system. This is a new change, and enclosures have yet to be designed. The main components are the 12v power supply, the DM2722A stepper driver, and the two solid state relays. The power cord has also been included here. It has an inline GFCI to improve the safety of the device.
WARNING!!! Working with mains power in dangerous. Do not attempt this if you are unsure of what you are doing. You are responsible for your own safety.
| Image | Name | Description | Source | Qty |
|---|---|---|---|---|
 |
Solid State Relay | 32 VDC Control, 10A 24 - 280 VAC-OUT(Zero-crossing). | Gold Electric-Tech SAP2410D or similar | 2 |
 |
12V Power Supply | 20A capaity or more (18A in a pinch). Server power supplies work great | Various | 1 |
 |
Stepper Driver | Long's MN: DM2722A or Wantai MN: DQ2722MA. Buy with Stepper motor | from Longs Motor via Ebay | 1 |
 |
In Line GFCI | Make sure it meets your voltage requirements (120 or 240v) | Various | 1 |
 |
Inlet Male Power Socket with Fuse Rocker Switch | Make sure it meets your voltage requirements (120 or 240v) | Various | 1 |
 |
Power Cord | 16awg or 14awg. (Don't use 18awg!!!) Make sure it has a ground wire and fits your receptacles | Various | 1 |
 |
Wire Nuts | Must have capacity for 5 16-awg wires. Typically red in the US. | Various | 3 |
 |
Ring Terminal | Sized for 16-awg wire | Various | 1 |
 |
Ground Screw | In the US 10-32 thread size is standard. Use what is acceptable in your location. | Various | 1 |
 |
M4 Socket Cap Screw 10mm long | Used for mounting the electronics to the enclosure | Various | 12 |
 |
M4 Nut | Various | 8 | |
 |
M4 Washer | Various | 12 | |
 |
Wire 16awg Stranded Green | For making ground connections | Various | 3 ft (approx) |
 |
Wire 16awg Stranded Black | For making Live connections. The color standard in your location may be different. | Various | 15 ft (approx) |
 |
Wire 16awg Stranded White | For making Neutral connections. The color standard in your location may be different. | Various | 15 ft (approx) |
 |
3/8-in Clamp-on Type Service Entrance Connector | Separate entry/exit for both high and low voltage wires. | Various | 2 |
 |
Mains Voltage Enclosure | Not designed yet. | Made | 1 |
DM2722A by Longs Motor at (http://www.longs-motor.com/stepper-motor-driver-dm2722a.html)