Eric642
Red Skull Member
So if you cut a square only two sides are beveled? I would be looking at your torch not square to the table or maybe since your slats are straight you are cutting right on top of a slat or one side?
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Home Built CNC Plasma Table
- Thread starter LScout800
- Start date
This was a picture of a piece I cut out of 1/4".
Square on one side, heavy bevel on the other.
Torch not being square is a possibilty, I will get my new design together and see if it improves any since I did redo the torch mount.
Eric642
Red Skull Member
Wow that is quite a bevel. If the torch wasn't square you would have two sides beveled (one outwards and the other inwards).
Weird one. The bevel only shows up when the torch switches directions? I.e. the whole side of the square is beveled? Just trying to figure out if it is a consumable (or maybe air) issue or mechanical.
Weird one. The bevel only shows up when the torch switches directions? I.e. the whole side of the square is beveled? Just trying to figure out if it is a consumable (or maybe air) issue or mechanical.
Yes only when you switch directions. Bolt holes end up not being cocentric by a wide margin.
CarterKraft
Red Skull Member
yeah 45* bevel seems like you would have noticed the torch out that far.
carslut
perfection in plasma
wow, that's def not great. is it consistent with the bevel edge on the same spot for all parts? i had a thermal dynamics machine that would do that on the same edge no matter what. ended up just how that plasma wanted to cut. swapping to a hypertherm and zero issues like that to deal with.
It is consistent for all parts, have tried different air pressures, travel speeds, and amperages (have plugged in some extreme values.) And still the same results, if it persists I will pick up one of those torches that are meant for a cnc table that point right at the piece, and if it keeps happening I will save up for the hypertherm.
If rotating the nozzle affects it, that pretty much tells you it's consumables or the torch head itself.
Is it always the same side of the piece being cut, but changes sides when you rotate the nozzle?
Firstram
Well-known member
Have you tried cutting in the opposite direction, CCW vs CW?
Will give this a shot.
Firstram
Well-known member
I don't have any experience with this but a buddy told me he saw a difference. Worth a try
I had my cutter set up cutting the same direction as everyone else with this same plasma cutter. We will see if there is a difference going the other way.
PAToyota
Red Skull Member
From Hypertherm:
Some good basic information: https://xnet.hypertherm.com/Xnet/library/download/?file=HYP105860
Some good basic information: https://xnet.hypertherm.com/Xnet/library/download/?file=HYP105860
This is good info. Looks like my torch is too high and my travel speed is too fast among other things.
SomeGuyFromOlympia
Well-known member
- Joined
- May 31, 2020
- Member Number
- 1706
- Messages
- 1,030
if you are using a Hypertherm, like already stated, set it by the book exactly and it will work perfectly
dont forget to keep your air dry,
dont forget to keep your air dry,
Been busy since school started, between work, school, and girlfriend managed to get this thing working.
It works, much better than before. The increased bearings and rigidity made it much better. The touch off is giving me issues, can't seem to figure it out on the software side of things. Z-Axis works just fine I just need to zero it manually which is a pain. A few small changes I want to make, like cleaning up the wiring and adding a control box, and it should be fine.
CarterKraft
Red Skull Member
Awesome
Been busy since school started, between work, school, and girlfriend managed to get this thing working.
It works, much better than before. The increased bearings and rigidity made it much better. The touch off is giving me issues, can't seem to figure it out on the software side of things. Z-Axis works just fine I just need to zero it manually which is a pain. A few small changes I want to make, like cleaning up the wiring and adding a control box, and it should be fine.
With your computer skills you might look in to Linuxcnc/QTPlasmac, not that there is anything wrong with your setup just that linuxcnc/QTPlasmac is plasma cutter specific controller with built in THC and Ohmic sensing support.
LCNC is free, the top notch MESA hardware is under $300.
Sorry for al that, your setup is awesome
WIll have to look into that. Been having so many issues with the openbuilds controller it is annoying. I also tried UGS but it is very unreliable, it just randomly disconnects or will not connect at all. I guess if I was running their hardware it would work but it is a lot of trouble.Awesome
With your computer skills you might look in to Linuxcnc/QTPlasmac, not that there is anything wrong with your setup just that linuxcnc/QTPlasmac is plasma cutter specific controller with built in THC and Ohmic sensing support.
LCNC is free, the top notch MESA hardware is under $300.
Sorry for al that, your setup is awesome
Been trying to find a controller I can run on my old laptop that is stuck running windows 7, would really be nice to avoid bringing my new (and very expensive) laptop into the garage. Looks like I might be able to put linux on it.
CarterKraft
Red Skull Member
I am far from the expert on the subject but I was able to get it going.
You don' need much PC for it is a plus, many guys use old PCs, Laptops and Bios with a lot of energy saving stuff are frowned upon.
I am using a HP 600 ProDesk mini like this.
Mesa card (not required)
THC
Wiring goes like this as an example
I think I am going to figure out my issues with openbuilds and run that. It seems difficult to find anywhere else with free CAM that works with my controller.I am far from the expert on the subject but I was able to get it going.
You don' need much PC for it is a plus, many guys use old PCs, Laptops and Bios with a lot of energy saving stuff are frowned upon.
I am using a HP 600 ProDesk mini like this.
Mesa card (not required)
THC
Wiring goes like this as an example
Yes, it is just settings issues. That was the first cut and it needed a little bit of calibration since I had the wrong step per mm settings so it was cutting a little smaller. I cut a bunch of holes and squares and it is around +/- 1/32 based off a bunch of small 1 inch squares and 1 inch holes in the 1/4 inch plate.
I am toasting the consumables, they are only lasting like 2 minutes of cut time. It will cut great three times then the fourth, bam just destroys the workpiece because the consumables were bad, replace them then we are fine. Will have to start looking for another torch, this one has special consumables that are specific to this one. And are like twice the price of the others and a lot shittier. My other chinese plasma cutter's consumables last way longer and are cheaper.
Edit: I was looking at my consumables kit and noticed a part in there called a swirler I had never seen before. Looked at my torch and it was not there. Apparently the child that put my plasma cutter together in china forgot to put it on. Put it on and it works much better now. Cuts are much cleaner with barely any slag.
Edit: I was looking at my consumables kit and noticed a part in there called a swirler I had never seen before. Looked at my torch and it was not there. Apparently the child that put my plasma cutter together in china forgot to put it on. Put it on and it works much better now. Cuts are much cleaner with barely any slag.
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CarterKraft
Red Skull Member
Good find.
There is some info I posted in the non HF plasma thread about different nozzle sizes in regards to amperage, look into that if you have not already, the standard shit is nearly random.
There is some info I posted in the non HF plasma thread about different nozzle sizes in regards to amperage, look into that if you have not already, the standard shit is nearly random.
I will have to. So far I have been getting weird results with playing with amperage, the best results have nothing in common with the specified ones in my manual I am finding out.
CarterKraft
Red Skull Member
My 80amp machine came with 1mm nozzles which aren't what is specs for 80 amps...
The 1mm nozzle is also too big for 30-40amp cutting 🤦 so I expect to buy a decent assortment of sizes once I get rolling to try and dial in the cut charts.