Hi,
I am trying to build my own hot-wire polyester cutter. I am using a switching power supply rated at 12V@1.5A, and a stainless steel wire (SS316L) that is long just as needed to get at around 10 Ohm.
The problem,is that the load resistance is not enough, and triggers the short-circuit protection. In fact, the power supply goes to 0V as soon as I connect the 10Ohm wire.
I am looking for possible solutions... I would like to avoid using a dummy load to not waste power.
A possible solution that came to my mind is to use a linear voltage regulator like a good old LM317 (or LM338) - actually, varying the output power could come in handy -but that would defeat the purpose and efficiency of a SMPS...
Do you guys have any tricks for this issue?
I am trying to build my own hot-wire polyester cutter. I am using a switching power supply rated at 12V@1.5A, and a stainless steel wire (SS316L) that is long just as needed to get at around 10 Ohm.
The problem,is that the load resistance is not enough, and triggers the short-circuit protection. In fact, the power supply goes to 0V as soon as I connect the 10Ohm wire.
I am looking for possible solutions... I would like to avoid using a dummy load to not waste power.
A possible solution that came to my mind is to use a linear voltage regulator like a good old LM317 (or LM338) - actually, varying the output power could come in handy -but that would defeat the purpose and efficiency of a SMPS...
Do you guys have any tricks for this issue?