I have some “baby heater beds” that i ordered from dirty PCBs. they are 100x100mm. I am planning on using them on my Printrbot simple. I have parts on order for actually getting everything together (bigger power supply, connectors, wire etc). The minimum order was 10 PCBs for 25 USD. Dirty PCB does not claim quality or process control, but these are the results.
2 out of 10 of these boards had visual defects (holes in the copper, either a mistake in the photo block application). These defects will probably make “hot spots” in the trace so i wont be using them. But even with 2 junk boards the price is $3.13 a board…
Heh. As long as a company tells you there might be defective boards, I think that is fine. I think a number of US companies should have “dirty” versions of their products for cheap. We all know that quality control costs money. I can spend more time proving we did not screw up at work than the amount of time doing the work. Of course then, for a place making a PCB, they could probably do quality control via USB webcams and an image comparison program.
This is just a guess, but you might have a slightly cooler spot on that line going down the center. and at the hole in the middle. Here is hoping that the heat is even enough when it gets through the glass.
I may use them down the road. But for now the other 8 will work fine… Accuracy by volume;) this was a 2 part venture, i wanted to check and see if dirty pcb was making usable boards, and these scream heater for the simple
I don’t have a psu that i can give up tougher now… But one is on the way…
The boards resistance is ~3ohm… Measured with a garbage meter. So i expect 4 amps, but am sourcing wires and a psu for 6amps a board. In the end i will be using an array of these on my ring rap build as they are about half the price per area as the prusa boards.
+Peter van der Walt does that mean that on a board that is bad on one side, you could just mark an X on it and use the other side? If both sides are good, could you use both sides till it gets hot and the just use one side? That would put it at potentially a 1.5 minute heat up time.
