PlasmaC Fiber laser 1Kw head height control + auto focuas

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31 May 2022 18:24 #244301 by taloot
ok but u dont need it, 
u can do those from mesa board,,, also chinese Breakout have this,the 5$ one
so we need less parts, involved, to make the laser working,...
our goal here is to make ultimate fiberlaser controller, with easy to use and install , 
i make and applet have all this in qtpy,, i can control laser directly and gas, 
 

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31 May 2022 18:25 #244303 by taloot
1 more and major problem faces almost all laser machines, 
the temp compensation for capacitance, the laser is extremely senstive the the hight, 0.1mm make diffrence between clean and dirty cut, 
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01 Jun 2022 07:27 - 01 Jun 2022 07:31 #244348 by Lilow
tallot.
I thank you again for the reply and all relevant information presented.
You are so ahead on this topic.
I always wondered about the heat situation at the Laser sensor head !!
Your less parts involved is a good thing.
What is the $5 one ?
As far as controlling everything under one roof, that would be amazing if you can put it together.
I look forward to seeing your progress on this.
I tried to download LinuxCNC last night to have look.
My laptop didn't have enough grunt left to load it, but I will keep trying.
But really, I don't think I can understand the LinukCNC workings, period.
In the meantime I will keep working with an idea.
I will keep watching as not many can understand what you seem to know.
Cheers.
 
Last edit: 01 Jun 2022 07:31 by Lilow.

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11 Jun 2022 07:48 #244931 by Lilow
taloot.
Small steps but have been seeing what you did in your video lifting the plate, this is only slow with steppers until I can connect the AC servos.
Cheers.

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19 Jun 2022 15:07 #245434 by taloot
gr8 process
whats ur leadscew pitch, 
the problem we are expert in plasma and we use to run machine at slow speed
with laser u need 50m/min + becuse this is the cutting speed for 2kw on 1mm sheet, 
its more interesting when u build Formula 1 machine, 
. my all metal machine speed is about 75m and acceleration about 0.99G

also for servo as u know the best servos is yasakawa,,, but delta b3 is better, the main advantage with those, that there tunning process is very accurate and detects the inertia of ur system , so u can see the machine, using yasakawa have smoother movement than othere japaness servo 

you need high inertia  motor for y axis.  and low for x axis , 
for laser building machine is the challenging part
 

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30 Jun 2022 07:37 - 30 Jun 2022 07:42 #246251 by Lilow
Thanks taloot.
The information you say is accurate to the information to what I have sourced.
For one instance, I should not have a need for 50M/min on the Z axis.
I have settled on 21.9 M/min on the X and Y axis, due the maximum 110 Htz available from the controller.

The challenging part is no problem regarding building the machine.

I am still working with the LFS-AP01 sense, I have now replaced the relays of the DT-115 with Photo Mos relays.
This is now working to 0.002v between the high / low signals for the Fibre Laser sense head height.
The setting of the actual read voltage is set around to 0.0004v, but the read voltage will  be a digit higher when running.
I have ordered volt metre to read the extra digit.

A video showing the reaction is below, not at 20M/min, but it works.
youtube.com/shorts/hTQ89CG5kpU

Cheers, Lilow
 
Last edit: 30 Jun 2022 07:42 by Lilow.

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31 Jul 2023 04:00 #276597 by shasse
Please let me know if I shouldn't resurrect this thread, but instead ask somewhere else. I am starting in on a LinuxCNC fiber laser project, and am working with a BCL-AMP sensor. I was wondering if the correct pinout was ever conclusively determined for the 4 pin connector. 5V or 24V? Also is the sensor PWM or frequency output? It seems like it can possibly be used as a drop-in replacement for THCAD, but I believe a THCAD outputs frequency. I've never been able to find a data sheet on the BCL-AMP. I'm hoping since the time this thread dropped off folks have made progress on workable fiber laser LinuxCNC machines.

Thanks!

Scott

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31 Jul 2023 05:23 - 31 Jul 2023 05:32 #276607 by Lilow
Scott.
There is possibly a need to do it.
I am using the LFS-AP01 sensor.
I've the Laser head and sensor running through the Mosfet relayed DT115, holding 0.15mm clearance at 8000mm/min.
Cheers, Lilow

Last edit: 31 Jul 2023 05:32 by Lilow. Reason: Put a video in.

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01 Aug 2023 02:07 #276675 by shasse
Thanks. Am I understanding it right that the LFS-AP01 is similar in the plasma world to the dedicated torch height controllers that worked independently of something like LinuxCNC? And if that analogy holds, I think the potential is for the BCL-AMP to be analogous to the THCAD board, feeding a capacitance value into LinuxCNC by way of the velocity of an encoder input so that LinuxCNC can do torch height control via external offsets.

If that's the case I'm much more interested in getting the BCL-AMP to work, but information on that sensor has been hard to come by.

Thanks,

Scott

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01 Aug 2023 02:46 #276678 by Lilow
Scott.
The LFS-AP01 has an adjustable voltage to position of 0 to10 volts.
The voltage is sensed from the capacitive field produced by the Laser cutting nozzle.
By putting this voltage into the modified DT115, I was able to set the nozzle height to plate by adjusting both the LFS-AP01 and the read value of the DT115.
Once establishing the desired voltage, the DT115 is the only read voltage being adjusted by utilizing a 5 digit volt metre.
If the read voltage in under 4 volts, it will read something like 1.2344 volts, (eg).
I could not get the BCL-AMP to work, it may have been faulty.
I will try and find the literature gathered and put up here.
Cheers, Lilow.
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