I would like to buy a laser cutter, probably Aufero Laser 2. However, I have read that it has no limit switches, so does not move independently to the home position. In a video I saw that the laser head is simply moved manually to the start position above the workpiece. Here in the forum I have read that the laser head is manually pushed into the home position before switching off.
What I would like to have answered before I buy the machine: How much of a hindrance are the missing limit switches actually in practice? Is it still possible to laser/cut several identical pieces in succession at always the same position?
Or is it so annoying that I’d rather spend the extra $100 and buy the Laser Maser 2 Pro?
I can go through the lot, the simple answer it that $100 will be the best investment in any laser you could possibly make.
My first two grbl machine did not have switches. I built hall effect for them, but realized how much of a help they were. Last grbl I bought (last xmas) has ‘factory’ limit switches on it…
Most of this software is set up for machines that ‘know’ where they are automatically, usually on ‘boot’ by the limit switches.
Without switches, you have to manually place the head to it’s ‘home’ position (limit switches do this, much more accurately) and power it up. They definitely increase repeatability.
It’s not like it’s not do-able without them, but they are a very nice addition, if you can afford them, you won’t be sorry.
Read the Lightburn grbl setup on the grbl machines They speak about it. At least I think that machine is a grbl machine…
Most machines motors ‘lock’ when that ‘axes’ isn’t moving, to prevent the machine from loosing track of where it is. So you don’t want to move them any other way than via a console or computer if they are not powered off.
I’m sure you’ll have fun, take care…
Hey Jack, thanks for the explanation!
The explanation of the GRBL setups states:
“With the machine powered, jog the laser head to the origin position. In the console window, type: G92 X0 Y0 and press (enter). The G92 command tells GRBL to set the current location as the specified coordinate, so you’re telling the machine “this is zero”. You will also need to set $10=0 for this to work correctly.”
Does this mean that once I enter the coordinates like this via the console, the laser will always know where zero is? Or do you have to set it again every time you start it?
And what does it mean that you built hall effects for your first laser?
Aufero 2 has a GRBL controller, that’s right. So does the Laser Master 2 Pro. I think even all Ortur lasers, but I’m not sure about that.
Personally, I think having a way to home using limit switches makes for a much more repeatable process. It’s a time and potentially frustration saver.
Every time you wanted to reset the current position which is at least every time you startup the machine. However, the conventional way to handle this is through a startup procedure. Manually place or jog the laser head to the front left of the machine and then startup or recycle power. Location at start is 0,0. This allows you to use Absolute Coords as normal. Essentially, it’s a manual homing process.
All Ortur lasers use GRBL.
So does it make sense to spend a little more money and have the limit switches for it? Okay!
I have seen that the Aufero Laser has 1 limit switch. But it has a tiny work surface of 18x18cm. The successor Aufero Laser 2 has no limit switches
But to buy the small and to be annoyed afterwards because of the work surface is also stupid, right?
It’s all unexpectedly complicated ^^"
Maybe you should ‘look’ at other lasers, now that you are ‘more’ educated…?
Honestly this is going to do mostly with how you expect to use the laser. If you’re doing a lot of one-off items that have relatively high tolerances (e.g. <2 mm) then you’re likely to never really even miss the limit switches. Some people only burn to the approximate center of a piece of material. For them the homing is almost a nuisance.
My general advice here is to buy for what you know you’ll need. Especially as you’re just starting out and the investment cost is relatively low. You’ll discover more about what you’re missing and what you’re totally fine with only after using the laser and establishing your workflow based on your needs. Then you can make a more informed decision for the upgrade.
I’ve looked around quite a bit, I think. Atomstack and Neje I have also looked at, Sculpfun and CO2 Cutter in general. But with everything there seem to be problems more often. More often than I’ve read about Ortur, anyway. It won’t be perfect either, that’s for sure. And also never come close to a good CO2 cutter. But what matters to me is that they ship from Belgium (relevant if you live in Germany and don’t want to pay high customs fees), the support seems to be very good, the laser modules do what I plan to do with them and the racks are relatively stable.
The only question that came up in my search was what about the limit switches and to what extent their absence affects the overall experience.
However, the reference to the accuracy has helped me a lot! Perfection I do not need, but ±2mm I find already relatively much ^^" So I will probably invest more money to have the limit switches and the associated repeatability fidelity.
Thanks for your tips and help!
There are always many options. That’s what’s nice about having a choice.
If you have questions we’re around and will try and help.
I’m sure you’ll be happy with whatever you decide on and have a great time with it.