Ok so after far too long, I finally have a new heatbed and SSR. The problem was with DHL, they ended up having it in their posession since December 28th, and it only arrived yesterday. Wonderful.
I'm now making a start on the long journey to doing all the upgrades. The first thing to tackle is the ATX power supply. I'm making a start now on tidying up all the wiring, removing excess wires etc. I know there is a chance that I'm going to have to put a load across the +5V, so I've a few questions with wiring this up:
1. IF I test it and I find that I do need a load resistor, could I use a 12V DC fan? I know that at 5V, it wont be running at full power, but it's ok, I'll find a use for it. If not, I've a tonne of 0.25W resistors. Would they suffice, and if so, what value should I be looking at?
2. I'm going to have to use my old heatbed to print a bunch of new parts for mounting the new heatbed. Thing is, it's currently mounted with 4 x 2R2 8W aluminium clad power resistors. The datasheet for them is here: http://uk.farnell.com/te-connectivity-cgs/ths152r2j/resistor-al-clad-15w-2r2-5/dp/1259346 I can't seem to find a Maximum Temperature for them. Originally, the heatbed had 4 x 4R7 15W aluminium clad power resistors, and I still have those somewhere. I'm trying to establish if I can get away with the 2R2 resistors for a short while to get the parts printed. I know they only heat in spots, but it's only a very temporary solution.
I'm now making a start on the long journey to doing all the upgrades. The first thing to tackle is the ATX power supply. I'm making a start now on tidying up all the wiring, removing excess wires etc. I know there is a chance that I'm going to have to put a load across the +5V, so I've a few questions with wiring this up:
1. IF I test it and I find that I do need a load resistor, could I use a 12V DC fan? I know that at 5V, it wont be running at full power, but it's ok, I'll find a use for it. If not, I've a tonne of 0.25W resistors. Would they suffice, and if so, what value should I be looking at?
2. I'm going to have to use my old heatbed to print a bunch of new parts for mounting the new heatbed. Thing is, it's currently mounted with 4 x 2R2 8W aluminium clad power resistors. The datasheet for them is here: http://uk.farnell.com/te-connectivity-cgs/ths152r2j/resistor-al-clad-15w-2r2-5/dp/1259346 I can't seem to find a Maximum Temperature for them. Originally, the heatbed had 4 x 4R7 15W aluminium clad power resistors, and I still have those somewhere. I'm trying to establish if I can get away with the 2R2 resistors for a short while to get the parts printed. I know they only heat in spots, but it's only a very temporary solution.