Need some help for the cables. March 16, 2014 05:37AM |
Registered: 10 years ago Posts: 38 |
Re: Need some help for the cables. March 17, 2014 04:59PM |
Registered: 10 years ago Posts: 869 |
RAMPS has 5 and 11amp fuses for the main electronics and heated bed respectively. 11 amps chassis wiring is a 20 AWG cable or approximately .5mm^2 for you metric loving builders. That's the bare minimum and doesn't give you any safety margin. Anything 1.5-4mm^2 will be fine with the larger the better up to what will fit in the connector.Quote
BoByS
Based on the formula, I think that 4mm^2 will be good enought, but I still need a help..
1. Pretty much any old extension cord will work. An old computer cable is fine with the connector cut off. 360 watts / 220 volts = 1.46 amps. Even if your power supply has awful efficiency converting AC to DC, you're still only drawing a couple of amps.Quote
BoByS
1) 1.5 mm^2 - for the LNG cables;
2) ??? - for the yellow and black cables;
3) ??? - for the heated bed's D08 purple cables.
The sockets normally only have 11 and 5 amps. They can have higher demands for short periods of time. Also many power supplies are a little overly optimistic in their rating and they can't produce that full current 100% of the time. Or in the case of many computer power supplies, the power supply is incapable of delivering the full power on the +12v rail. Instead, the total wattage is the optimistic sum of all the rails, or a combination of rails. The good news is that oversizing the power supply doesn't hurt anything and the printer will only draw what it needs. You may however pay extra for additional capacity you really don't need, or your supply won't operate at it's peek eficiency.Quote
P.S. Sorry about my lame questions, but these 30Amps really confuse me. The RAMPS board have only 11 and 5 Amps sockets...
Re: Need some help for the cables. March 18, 2014 09:39AM |
Registered: 10 years ago Posts: 38 |