Langmuir's CrossFire THC How does it work?
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- Опубликовано: 3 июл 2021
- In depth discussion of Langmuir's CrossFire THC including use of smart voltage and user selected nominal voltage. Demonstration of method used to derive nominal voltage is provided.
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Please don't listen to people who say you talk too slowly. Your talk speed is perfect! This is the best instructional video I have ever watched! And as a newbie to plasma cnc cutting, let me say, thank you a thousand times for taking the time to create this AWESOME video! I have subscribed to your channel!!!
Thx for those kind words. I’m not bothered but folks that rag me about my slow speech nor at my age am I going to try and change. So have joked that they play the video in 2x speed and it helps 🤣. Glad to know the info was useful
Don’t change how long the video is. I love how detailed you get. It helps me so much on learning. I read the same thing on the Langmuir site so many times and didn’t understand it but watched your video once and understood. If I was Langmuir I would hire you to make videos for there website. Thank you for taking your time to make these videos.
Thx…it good to know the video has been useful. I’m amazed how much I learn in the process of trying to explain to others…it has helped me considerably.
u the best at teaching. please continue to provide us with this kind of content regarding this langmuir table.
Thanks for the compliment…glad this old fart has done something useful 😜
Great in depth video, great to see people dig further than the unboxing and general use.
Thx for the kind remarks…
On 1.5 speed playback, the videos are perfect.
Helps me talk in normal speed! 😂
Great video, thank you for taking your time and being thorough and informative.
Thanks for taking the time to do the video. 40 minutes was well worth it. (also the one on IHS) I've improved my cuts greatly. Now if I could just get the underside dross to improve. How about sharing your knowledge on that subject sometime. Great job!
Funny you should ask…I’m currently doing that specifically for 11 gauge steel but the methodology is appropriate for any material and thickness. I may follow it with one for 16 gauge. Should be uploaded to RUclips around 14 July. Turns out for dross it appears cut height is not as important as cut speed and what’s weird is that for 45 amp and 11 gauge steel, 125 inches per minute and 175 IPM have minimal backside dross but 150 IPM has terrible dross??? Anyway the video will show the method I use to determine the best cut height and speed.
Honestly I didn’t even realize it was 40 minutes 😂
I've never dug into any of this. However after seeing your dross, or lack of, I'm going to spend the afternoon dialing in my Pro. Thanks
There is a lot of info here. Glad you werent talking fast!
What a great tutorial I really appreciate it and on a holiday, thank you so much for taking the time to do this video and don't worry about the time of the video..... It is to bad that Langmuir did not create a video on this very important issue they should put this in the in their tutorials. Again thank you I will be using this from now on,
Great job, great visuals.
I love your videos just the way they are
Awesome video! I learned so much.
Thx for the kind remark. glad the video it was useful to you!
Thank you!
yes it was a bit long.. but it answered a lot of questions and educated me about things I hadnt considered.. thanks so much for taking the time, I appreciate it. do you also have a video or recommended set up for the grounding on your machine for the THC to work properly? ours has never worked in the 2 years we've owned it, so we gave up on it.. I'd like to re-visit it now. thanks again
Good information.... thanks
I see you are doing a marathon watching a bunch of my videos! Not sure how you can stand listening to me that long and not go crazy🤓. Thanks for all the compliments and I’m glad it has been useful!
grasias por toda tu informacion grasias me alludaastes mucho
Gracias por las amables palabras, me alegro de que haya sido útil. Hope that came out right! 🤓
You have failed at nothing sir, I hope that I never need to get this deep into my setting but it’s nice to know that ai can if I need or want to. Thank you
Those are some awfully kind words! Thanks. 🤓
I love your videos keep doing your thing buddy, ps i dont think you talk too slow 👍😀
Gret stuff!
Thx
Great video! I just ordered my machine yesterday and I’m sure this video will save me hours of headaches! Would love to figure out where that initial cut height in the gcode is coming from! Thank you!
Hi Scott, glad you found the video helpful. What is the lead time for Langmuir tables these days? Mine took over 4 months for all the boxes to arrive. The ISH video might help answer your questions. Here is a snippet of code from a simple cut from the Fusion 360 post processor where I have added the comments in Brackets. Very similar code should be from other post processors as well:
(2D Profile1)
G0 X1.92 Y4.0044
G92 Z0. [sets current torch height position to zero regardless of where it is it assumes it to be zero]
G38.2 Z-5. F100. [moves torch down at speed of 100 ipm for distance of -5 inches or until it makes contact with plate - whichever is first; then stops]
G38.4 Z0.5 F20. [moves torch back up at speed of 20 ipm for 0.5 inches]
G92 Z0. [sets this new position as the Z=0]
G0 Z0.04 (IHS Springback + Backlash) [moves upward an additional 0.4 inches to account for springback & backlash - note: I have modified my value in my post
processor. your number may be different.]
G92 Z0. [resets this new position to be the NEW z = 0]
G0 Z0.15 (Pierce Height) [now moves upward 0.15" for pierce]
M3 [turns on the torch]
G4 P0.7 [pauses 0.7 seconds while to complete pierce - note: cut charts say pierce delay for my machine and this material is 0.3 sec but i add 0.4 sec because of inherent
delay in the THC software...yours may be different]
G0 Z0.06 (Cut Height) [move from 0.15' pierce height to 0.06" cut height]
H1 [ begin the torch height control monitoring]
hope this helps
Dan
@@CustomCreations3 Hi Dan thanks for the quick reply! Lead times are 5-7 weeks on their website but that sounds very optimistic based on what I see in the forums! I will have to look at what post I get out of fusion. I am curious about the gcode value you were getting from the straight line cut built into Firecontrol if that .080 is configurable. One last thing as a newb I'm trying to learn the lingo. Is the springback and backlash the distance between when the tool hits the work and when the switch is depressed? Thanks!
@@ScottDube1 spring back includes the motion of the plate upon contact. For thin metal that is not in contact with a table slat (and thus can deflect) the torch is driven down and contacts the plate but the weight of the torch is sufficient to deflect the plate for some distance before the contact switch opens. But then when the torch is moved up the plate “springs back” so this value that comes from the post processor code is an attempt to account for it. Backlash is the loss of motion due to slop in the lead screw and nut
Thanks so much for your informative videos! At the end of the day, do you think it substantially worthwhile to use nominal voltage instead of smart voltage? It seems to me that the cut height issues (and inaccuracies) may be more important.
Thanks for the compliment.
To be honest I pretty much use smart voltage the vast majority of the time. If I’m cutting thin stuff 22-26 gauge I’ll sometimes use a voltage setting instead of smart voltage but rarely. In the time I’ve had this table I’ve come to believe the nozzle is the prime culprit for poor cuts (at least in 11 and 16 gauge steel. Next is the ground and the electrode. I could be wrong but I’ve noticed that when cut quality starts to suffer and the electrode still is within wear spec I’ll throw in a new nozzle and this usually is the fix. Granted the cut height is important but I’ve seen reasonable cuts with double cut heights…again all this is observed with the thinner material but that is where most of my cuts are so that where my limited expertise lays! 🤓
One question I have is if you put the nominal voltage in you cut parameters in fusion will fire control use that instead of the cut height? I use sheet cam and cannot find a nominal voltage or voltage setting
No i can only input a nominal voltage in the THC settings panel in FireControl. Fusion 360 CAM output using the Post processor from Langmuir is where I can set pierce and cut height and the springback/backlash value. I either have to do the line cut "experiment" to come up with the nominal voltage or get it from the cut sheet that came with my plasma cutter (Hypertherm in my case)
I’m only 15 minutes in and this is good information. I have the Crossfire Pro and I’m pretty new at this, so this is good information to have.
The pages that you’re reading off of, did you make those? Is there anyway to get those so I can print them off and have them for reference?
Hey Ryan,
I'm happy to provide you the docx I used in the video. Are you a member of the Langmuir Forum? Might be the easiest way to get them to you. I could upload a pdf on the forum for you to download. Let me know if this works for you
@@CustomCreations3 hello sir, just wanted to send a friendly reminder to send those pages. Thank you!
Hey Ryan, I’m trying to find a way to send them to you. Did you see my reply about the Langmuir forum?
Ryan, I put the slides on Google Drive. Try this link
docs.google.com/presentation/d/1ClGpBBLEAbKN3SYZ_8EG6TzjBOr9AtyysB_byyV3SRo/edit?usp=sharing
Thank you buddy..but how did you fix the .080
🤨 never did! My straight cuts on 11 gage and thicker are usually without IHS unless the plate is significantly bowed. On thinner material the dross is never as bad so the .080 doesn’t bother me. I need to find where the Gcode for straight cut is stored and do some more investigation!
Can you unconfuse an old manual machinist wading thru the CNC world? I have a Langmuir Pro table w/ IHS&THC and Razorweld45. Sheetcam is my post processor. No cut chart for the Razorweld, so Hypertherm’s chart was imported as a tool set. For both Fusion and Sheetcam, Lagmuir support download page tells you to toggle to “no” for Fusion IHS/THC and/or set pierce height and cut height to “0” in Sheetcam tool menu. This does not work. Also, if you want to view, modify, or simulate your gcode use free “NC Viewer” online.
Yea the CNC plasma table is my entry into the CNC world as well so I feel your pain! I’ve not used sheetcam but I looked through the setup instructions on the Langmuir support page and the download page. You have the Crossfire Pro so by default you have the Z-Axis upgrade so use those instructions. The setting pierce and cut height to zero are for the CrossFire machine that don’t have a z-axis that moves. On those machines you CAN upgrade to a moving z-axis but your Pro comes standard with it. Anyway, follow the setup for the z-axis and I’m thinking you’ll be set.
Would like to have a printable version of these pages
Printable version of the z-axis setup? The complete assembly guide is www.langmuirsystems.com/pro/assembly. You can print the entire guide. Hope that helps
Wish I found this video 2 years. Langmuire support is garbage.