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New Plasmacutter

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17 Jul 2021 18:03 - 17 Jul 2021 20:18 #215157 by Giuseppe
Replied by Giuseppe on topic New Plasmacutter
No, this shifting of the Cut. Compare the final Skull above with the Last try. 

 

The next try works fine again.

 
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Last edit: 17 Jul 2021 20:18 by Giuseppe.

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17 Jul 2021 21:23 #215173 by tommylight
Replied by tommylight on topic New Plasmacutter
Oh, that is missed position due to steppers loosing steps, or the torch touching the plate and motors skipping due to friction/load.
Also can be due to interference, so move the plasma source as far as possible from the PC and electronics, torch cable also far from other stuff, best hanging from the ceiling.

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18 Jul 2021 14:20 - 18 Jul 2021 14:25 #215228 by Giuseppe
Replied by Giuseppe on topic New Plasmacutter
I do some more test.Please take a look.This was the best result about the slag.1.4mm Material, 1500mm/min 25Amps 
On the first picture, the edge below is skew.

 

 
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Last edit: 18 Jul 2021 14:25 by Giuseppe.

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18 Jul 2021 16:36 #215236 by billykid
Replied by billykid on topic New Plasmacutter
but at what height does the torch travel? Are the nozzles and electrode new? I did a test with mine days ago with a twisted and rusty metal sheet at f1500 and 25 amps. regards Mauro
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18 Jul 2021 17:56 - 18 Jul 2021 17:59 #215242 by Giuseppe
Replied by Giuseppe on topic New Plasmacutter
nice result.
all new, cut high 2mm

i try to cut small pieces and filigrant pattern
but slowly i think this is not possible with plasma cutters.
not the ones in this preice range :-)
Last edit: 18 Jul 2021 17:59 by Giuseppe.

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18 Jul 2021 20:04 #215247 by tommylight
Replied by tommylight on topic New Plasmacutter
Plasma is a "brute force" type of machine, so not for small or intricate designs, still a lot can be done with it.
What nozzle are you using?
Why 25A ?
-Set it at 40A and try it faster, see how that goes.
-Also, change the nozzle, set the pierce height to 3 or 4mm and test if it fires consistently, try different speeds...
-25A is not good as the nozzle has to be very close to the material
-Nozzle will have to be changed anytime the material flexes when probing and the torch fires very close or touching the material
-use 1mm or 1.1mm nozzle for 2-3mm @ 40A, 1.3mm or 1.4mm for 4-6mm @ 50A
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18 Jul 2021 20:19 #215249 by billykid
Replied by billykid on topic New Plasmacutter
It really depends on the type of torch .. mine for example is a pneumatic s45 torch that can cut in contact with the piece with good results and little power. I have this table but it seems too optimistic :-)
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18 Jul 2021 21:17 #215259 by tommylight
Replied by tommylight on topic New Plasmacutter
Yup, those seem to optimistic for a 30A plasma cutting machine using plain air.
 

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19 Jul 2021 11:41 #215313 by RNJFAB
Replied by RNJFAB on topic New Plasmacutter
I cut a lot of artwork/signs from 1.2mm or 1.6mm.

I have found that 40A (on my little plasma) with a 0.9mm nozzle is best. I run a pierce height of 3.4mm. Cut height of 1.2mm.
Normally moving around the 2800mm/min mark.
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22 Jul 2021 18:53 #215610 by Giuseppe
Replied by Giuseppe on topic New Plasmacutter
thanks for the comments. I will try tommorow. Yesterday i do this little test after optimizing the motor attachment in the x and y axis.
Now it use springs to press motor to the racks.

I think it is a bit better then before.
Second pic is after editing the axis.

 

Tomorrow i will try with the parameters you tell me.

 
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