Lowering Burny-Star L ST 171 Pyrograph Tip Temperature for Detailed Work

Hello,
While reading the reviews about the devices, I have recently purchased a Burny-Star L ST 171 professional pyrograph. (A supply station with temperature control and a butt with a resistance wire).
Reading the topics on this forum, due to the rather complicated process, dissuaded me from trying to create a device from scratch.
Coming to the point: the lowest temperature offered by the burner is 450 degrees - this temperature is definitely too high to work on miniatures with small details, also shading comes with great difficulty (Razertip, unavailable in Poland, offers work from 170 degrees)
Could any of the Readers advise me on a safe way to lower the temperature of the tip?
I was getting ready to prepare my tip from a thicker wire (hoping to lower the temperature) but the fear of burning the power station led me here to ask more experienced people.
I will be grateful for your help on the topic.

It is impossible to answer this question without knowing what is inside such a pyrograph. I suppose there is a thermocouple inside that senses the temperature of the tip, a comparator and, for example, a power supply whose power is controlled by voltage. In the simplest situation, the whole thing can be reduced to replacing the resistor next to the potentiometer for setting the temperature.

Ok, would it be safe for the station to experiment with tips made of wire with different resistance? Could this method be used to lower the temperature without affecting the life of the transformer?

Gmiter wrote:

Could any of the Readers advise me on a safe way to lower the temperature of the tip?

I suspect that this "temperature control" is just a regulation of the current flowing through the tip. However, without knowing the internal system, nothing can be said more precisely.
You would have to disassemble the device and take clear pictures of the interior and the circuit board.
The tip is most likely a piece of resistance wire, not ordinary copper wire.

Wouldn't a lower resistance wire tip reduce the temperature?

Added after 23 [minutes]:

Additionally, how would the solution based on creating a bridge on the mainsail according to the diagram attached in the photo work? Would the temperature at the tip of the tip stay the same?



Added after 15 [minutes]:

I already have the equipment at home - hence the need to lower the temperature when I tested it.
It is covered by the warranty, so I try minimally invasive methods first.

Is there any risk of an increased electromagnetic field in the case of the above-mentioned bridge?

Freddy wrote:

I suspect that this "temperature control" is just a regulation of the current flowing through the tip.

There is definitely no thermocouple there, because how would it fit into the tip of the burner?

Gmiter wrote:

Wouldn't a lower resistance wire tip reduce the temperature?

Gmiter wrote:

How would the solution based on creating a bridge on the mainsail according to the diagram attached in the photo work?

It all depends on the design of the device in the box (power supply with power regulation). If it can safely withstand the increased power consumed (additional jumper on the tip) is OK, but how not? As for lowering the power by changing the resistance of the tip - it is not known exactly what the power supply is - if it regulates the power by changing the voltage, then when the resistance is reduced, more current will flow - assuming that the voltage remains at the same level - the power will increase. It can also be a current regulation - then changing the tip resistance can do something.
However, it all depends on how the power supply is built.

Gmiter wrote:

Is there any risk of an increased electromagnetic field in the case of the above-mentioned bridge?

Danger? For whom? For the user? Have you heard about MRI? A magnetic field that is thousands of times more powerful is used for this study, and somehow the patients survive the study.

Regulates the change in voltage at the output: from 0.5 V to 1.6 V

This voltage can be achieved in several ways. Anyway, you can try with increase tip resistance (if you have such a resistance wire).

398216 Usunięty wrote:

If it can safely withstand the increased power consumed (additional jumper on the tip) then OK, but if not

I could also ask for an explanation of the risk of short-circuiting the tip with a bridge (e.g. from copper wire)?

398216 Usunięty wrote:

In any case, you can try to increase the resistance of the tip (if you have such a resistance wire).

Can I find out the resistance of the current tip with a simple multimeter? I tried initially and the values change quite a lot over time (probably due to the bad adhesion of the meter tips)

Gmiter wrote:

I could also ask for an explanation of the risk of short-circuiting the tip with a bridge (e.g. from copper wire)?

You add additional resistance in parallel to the existing burr - as a result, you reduce (as long as you don't measure the resistance of the tip) the resistance "seen" by the power supply. If this resistance is too low, the power supply may be overloaded and, consequently, damaged. Besides, such a bridge (for the voltage you specified) will not touch the tip well (you would have to weld it), and therefore it can bypass once and not once.
I think that the principle is similar to transformer soldering irons - in them too much wire thickness causes a significant voltage drop (because it overloads the transformer) and the tip heats up less, but the transformer (in this case the power supply) more ...

Unfortunately, I will not look inside the power supply because I have a warranty seal. Well, at the moment I am releasing the modifications. Maybe one day I will catch my eye something that suits the installation of a thinner resistance wire in place of the current tip.
Thank you for your help.