a couple noobie questions November 26, 2014 04:43PM |
Registered: 9 years ago Posts: 3 |
Re: a couple noobie questions November 30, 2014 02:16PM |
Registered: 11 years ago Posts: 205 |
Re: a couple noobie questions December 01, 2014 09:51AM |
Registered: 10 years ago Posts: 869 |
22 ga is typically what steppers will come with. If you have a very long run stepping up to a larger gauge might get you a little but probably isn't necessary.Quote
jmorken
What wire thickness is recommended for the nema17 stepper motors?
Voltage doesn't really matter. Current does. You can use a table like this to see what wire gauge for the current you'll be drawing. Use the chassis wiring column. Most beds will draw 15 amps or less so 18 ga is the minimum. If you want to play it safe, you can go up a gauge or two. For the hot end, less than 4 amps is drawn and 20 ga is usually fine.Quote
What wire thickness is recommended for the heated bed 12Volt power wires and the 12V hot end heater cartridge wires?
Depends on what thermistor you're using and what "room temperature" is. Usually a 100 kOhm (but sometimes 10kOhm or rarely something different) thermistor is used. That 100kOhm value means that at T25 (25 degrees C/77 degrees F) the resistance should be 100kOhms. As the temperature goes up, resistance goes down with a NTC (negative temperature coefficient) thermistor so if you're room is warmer than 25 degrees C, then it will measure a little less than 100kOhms, if it's a little cooler than it will measure more.Quote
What resistance values should I be getting on my hot end and heated bed thermistors at room temperature?
Depends if you want torque or velocity. Series wired will have more torque, but at the expense of velocity. The faster you go, the torque will drop off quicker. Parallel wired stepper will have less overall torque than series wired, but the torque will be maintained at a higher velocity. Many wire them in series as the z-axis doesn't usually have the need for high torque at faster speeds. If you're using RAMPS or another electronics that has an extra unused stepper driver, you can have the best of both worlds and use the extra driver for the 2nd motor.Quote
To wire the Z axis stepper motors, should I just solder the stepper wires in parallel and then connect this to the Reprap electronics?