I have a GRBL laser controller and one output I cannot find what it is for. It’s bugging me can some one help. It’s marked as “Steering Gear” ?
Are you talking about a remote pendant socket on the controller board?
If my guess was not good, then an image of what you are talking about might help someone help you.
Couldn’t it be an output to switch between low or high airflow to complement the Air assist?
These Chinese translations are often misleading.
Google through this up if it helps
This was my first thought too, but I think this applies to some kind of CNC milling machine. Milling machines need Z axis. This board only have X and Y so it maybe something else… 
That board looks like a custom manufacture unit, like my iCube board, made just for the manufacturer. I would hook a meter to it to see if it supplies power or is a switch. The connector is too small to be much else. Only the manufacturer knows for sure. Contact them to learn what they will say.
Thanks guys. Very interesting particularly the Far Eastern bit.
It’s from a Lunyeetools S1 3040 laser engraver and no I have not yet put a meter / scope on it yet. But soon. Thanks
It’s from a lu
Its a 5v output… maybe can configure it to trigger air assist via relay solenoind valve etc ?
THe description I found as follows …
● This control board is a 32-bit MCU control board, which runs faster, the maximum no-load speed reaches 40000mm/min, the algorithm is optimized better, the vibration is smaller when the machine moves at high speed, and the performance is more stable;
● Using the Type-C USB interface, it is more convenient to use and the data transmission is more stable;
● One-piece integrated drive
● PWM output frequency 10kHz, higher engraving precision and clearer details
● Y-axis dual drive, stronger drive capability;
● Support USB automatic identification, when plugged in USB and connected to the computer, the offline interface is automatically shielded to avoid offline interference with data;
● 5V power output port, and software controllable, easy to expand various functions;
● Support USB flash firmware, firmware upgrade is more convenient;
● XY limit switch interface each
● Self-contained laser anti-burn mode, laser S value >=100, after the laser is turned on, if there is no movement within 5S, an alarm will occur
● Type 4540 - with a gyroscope module that can detect the movement of the machine during the engraving process, preventing someone from moving the machine
This is contrary to most engineering opinions.
I do not understand the relevence of vibration, to a port on a controller board?
Me neither. It is your text apparently copied from tech sheet.
Yes it was copied the clue was in the line “THe description I found as follows” Umm sorry I copied the text in full from the data sheet next time ill just post pictures, i thought it would just show all the info i found for the board. IE what that port was outputting was the question, of course we could start looking at component identification, and see if any of the components could be changed out just to go off topic even further !!!
This will not tell you what “Steering Gear” on the board means.
Yea well, you need to inject some humour in your life, the diagram already shows as to the opening post what is the steering gear port, it shows as you well know its a 5v output port, why you have to dig into posts, to go off topic is amazing I was taking the piss!
As the Description says>>>>>● 5V power output port, and software controllable, easy to expand various functions;<<<<<< did you miss that in your disection?
As you are an Electronics Eng, I would of presumed that you would of put it together that a GRBL board it is probably an output for relay activation, maybe even for Air assist function, as many other GRBL Boards have as a 5v port. Do I need to buy one and test it for you so you can rest easy, as I can see this is interupting your sleep pattern!
As with so many forums, there is always one that has to make irellevent points to a simple question. Electronics Engineer LMAO
Here is another reference to Steering Gear, read it you can go off topic even more then!
The joke is on you, I never claimed to be an engineer.
Why the rant? I am simply indicating i do not know what the Chinese meant when they used the phrase “steering gear” for an output on a digital board.
Hope you did not get any on your foot.
● 5V power output port, and software controllable, easy to expand various functions; < And lifes to short to engage with you any further. IGNORED MUTED!
Don’t tease me!
And life’s too short…