Ok well I just made THE BEST mod yet to the rostock today and I'm verry happy with the results so I thought I would share the happiness around.

It all started last night when the power just cut out to the machine while I was trying to do a print with a 105C bed and a 255C nozzle temp, I decided then that the machine needs a pressure test so I dont get stuck with it stopping on me mid print or while I'm not watching it. I set a 120 C bed and a 255 nozzle temp and let it get on with the job.... I got it up to temp (well almost) once before it just started cutting out on me time after time... I removed some covers, it still cut out... I removed all the covers and panels, it still cut out... I let it cool, ran it up to temp to get a benchmark and thats where I switched it off and started the dissassembly.
If you have read the first post you would know I already had a Thermaltake Toughpower 750w CM but Thermal's ran high and tough it certainly wasn't so it had to go. Just for reference here's my warm up times for the Thermaltake, I only started heating the hotend after Heated Bed had hit 110C but it kept switching itself off and subsequently to get to 115C I had to forego Hotend ignition... boo... I will say though that at least the thermaltake shut tself down and didnt try to catch fire on me or something.
This was also wired correctly as in I had 3x 18AWG wires running from each of the 4 12V rails with 2 rail (6x18AWG wires) dedicated to the Heated Bed which apparently should have been 36 Amps total available to the Heated bed circuit.
Thermaltake 750w Test:
Ambient Air Temp 24C
Heated Bed starting temp 24.4C
Time to heat to 100C = 12 minutes.
Time to heat to 110C = 17 minutes.
Time to heat to 115C = 20 minutes. (hotend switched off)
Time to heat to 120C = Failed to reach temp due to psu failure. (Ran out of steam pffft)
So today I spent a large part of the day re-wiring and installing the new power supply, a stunningly beautiful Coolermaster 1100W UCP (Ultimate Circuit Protection) unit that I had lying around.

It puts out 1350W peak too by the way so I wasn't going to run out of juice this time...I hoped...
Heres the pics of the change over and re-wire.
6 x 12V Rails at a whopping 22 Amps each.
All the wires I didn't need were swiftly cut off at the knees... a bit hesitantly but swiftly none the less.
My finished wiring.
0.38A OK that should do the trick.
Copper.
Woop there it is...
Yes that's a lot of wires, I used what I had which meant as many 18AWG wires as I could cram in there. Two rails dedicated to the bed (44A), two to the logic and hotend etc (44A), one goes to the motors (22A) and theres one rail (22A) spare for future requirements plus still the 5V and 3.3V available for future use as well.
Neat and tidy.
Boom.
And finally for anyone who is interested and can be bothered reading all my ramblings...
Coolermaster 1100W UCP Test:
Ambient Air Temp 24C
Heated Bed starting temp 24.0C
Time to heat to 100C = 9.5 minutes. (save 2.5 minutes)
Time to heat to 110C = I bloody missed it coz it went so quick by the time I checked it was nearly at 115C
Time to heat to 115C = 14 minutes. (hotend switched off will test hotend on soon but I doubt it will make a difference

)
Time to heat to 120C = 16 minutes. (it wanted to keep going lol, how hot can I take this bed for testing purposes??)
As a note that is the potential Amps available to the Rambo... I still only have the bed wired up to the Rambo with the standard wiring as per the assembly guide so maybe I can do better yet but i've had enough wiring for one day.
I call that a success and time well spent, now to re-calibrate and start printing.
