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| Science Forum Index » Engineering - Joining (Welding) Forum » Plasma cutter flow rate requirement... |
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| Martin H. Eastburn... |
 Posted: Wed Jul 01, 2009 7:44 pm |
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Guest
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What kind of table do you have ?
I have one and there are groups in Yahoo. I have PlasmaCam myself.
Martin
Pete C. wrote:
[quote:6171130405]"Martin H. Eastburn" wrote:
If you have a big tank that will help. If you have several smaller ones all
connected it will deliver from the volume while the pump tries to catch up.
You have to have them stored with say 100 more pounds of pressure and regulate
it down. SO if you have an old one, put in line and as a storage and even pump
it to aid in re-pressuring. When you can replace what you have you might
want to keep the extra volume, but not pump.
A lot of time you can find various pumps and tanks for sale in estate sales
or simply moving. Using the tanks as a storage area will help a lot!
Think of water. If you have two 1/2" inlets and a 3/4" outlet - one won't
be able to keep up, but two will match the output. The volumes in the tanks
will deliver the flow as they drop in pressure being refilled by one or more
of the 1/2" inlets... So if you don't do 100% cutting for many minutes -
you might be ok. When you let go of the trigger, the pump starts overtaking...
As I mentioned in another post, you don't have to replace the existing
compressor, you can supplement it. If the current compressor can do say
4 CFM you only need to parallel it with another that can do 2 CFM or
better to get your required 6 CFM to support continuous cutting.
Consider cutting right angles - cut 2" across one flat and then let go of the
trigger. Reposition and cut again.
You won't use it all of the time, it is best to have one rated higher than
needed in volume and pressure.
The one I have is a belt driven, double headed cast iron I bought at Home Depot
(as I recall) with all green on the front - meaning all air tools can be used.
The low trip is above my Hypertherm 600 trip point and the pump can generate
more than I use and fill the tank several times during long cuts. I cut some
1/2" AR400 pre-hard at 8-10"/minute. If it weren't so tense, I could fall asleep.
I cut thin stuff at 200+ in/min and that scares me as the CNC table goes into
action!
I fired up the CNC plasma table I've been building for the first time
this past weekend  I did my test cuts on 14 ga steel at 150 IPM and it
is amazing the time dilation effect that occurs. The gantry moving at
150 IPM during testing seems pretty slow, but that same 150 IPM seems
like a rocket when there is a plasma stream going.[/quote:6171130405] |
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| Pete C.... |
| Posted: Thu Jul 02, 2009 6:36 am |
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"Martin H. Eastburn" wrote:
[quote:4716180028]
What kind of table do you have ?
I have one and there are groups in Yahoo. I have PlasmaCam myself.
Martin
[/quote:4716180028]
I built it to match my needs. Basically compact to not take up my whole
shop and fully enclosed and with water table to not mess up my whole
shop. Powermax 1000, CANDCNC Dragon Cut DTHC controls, Mach3, SheetCAM,
TurboCAD.
http://wpnet.us/first_plasma.wmv
[quote:4716180028]
I fired up the CNC plasma table I've been building for the first time
this past weekend I did my test cuts on 14 ga steel at 150 IPM and it
is amazing the time dilation effect that occurs. The gantry moving at
150 IPM during testing seems pretty slow, but that same 150 IPM seems
like a rocket when there is a plasma stream going.[/quote:4716180028] |
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| Winston... |
| Posted: Thu Jul 02, 2009 11:36 pm |
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Pete C. wrote:
[quote:ac762be44f]"Martin H. Eastburn" wrote:
What kind of table do you have ?
I have one and there are groups in Yahoo. I have PlasmaCam myself.
Martin
I built it to match my needs. Basically compact to not take up my whole
shop and fully enclosed and with water table to not mess up my whole
shop. Powermax 1000, CANDCNC Dragon Cut DTHC controls, Mach3, SheetCAM,
TurboCAD.
http://wpnet.us/first_plasma.wmv
[/quote:ac762be44f]
Yeah! I actually jumped when it lit off!
Very cool!
--Winston |
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| Pete C.... |
| Posted: Fri Jul 03, 2009 9:05 am |
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Winston wrote:
[quote:456a8a6e09]
Pete C. wrote:
"Martin H. Eastburn" wrote:
What kind of table do you have ?
I have one and there are groups in Yahoo. I have PlasmaCam myself.
Martin
I built it to match my needs. Basically compact to not take up my whole
shop and fully enclosed and with water table to not mess up my whole
shop. Powermax 1000, CANDCNC Dragon Cut DTHC controls, Mach3, SheetCAM,
TurboCAD.
http://wpnet.us/first_plasma.wmv
Yeah! I actually jumped when it lit off!
Very cool!
--Winston
[/quote:456a8a6e09]
Yes, nice to see it up and running finally. I've been working on it
since December or so intermittently. |
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| Martin H. Eastburn... |
| Posted: Fri Jul 03, 2009 8:19 pm |
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Guest
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Nicely done.
One thing I noticed was the return clamp on top!
At least you were not near.
I put mine on the bottom with a magnetic twist on attachment.
I use a high percentage of a plate and when possible, I cut out
circles, and rectangles - various shapes - to have steel around.
I cut a lot of AR400 steel and get chunks that the scrap man wont.
I'll make something out of them. The circles I like to use as
steel pads on machine feet.
Spreading the weight over a wider surface.
Looked like a large cane knife being cut.
I can't find a knife man around here - he'd love some of the scrap
I have for his forge.
Martin
Pete C. wrote:
[quote:2ce9023226]"Martin H. Eastburn" wrote:
What kind of table do you have ?
I have one and there are groups in Yahoo. I have PlasmaCam myself.
Martin
I built it to match my needs. Basically compact to not take up my whole
shop and fully enclosed and with water table to not mess up my whole
shop. Powermax 1000, CANDCNC Dragon Cut DTHC controls, Mach3, SheetCAM,
TurboCAD.
http://wpnet.us/first_plasma.wmv
I fired up the CNC plasma table I've been building for the first time
this past weekend I did my test cuts on 14 ga steel at 150 IPM and it
is amazing the time dilation effect that occurs. The gantry moving at
150 IPM during testing seems pretty slow, but that same 150 IPM seems
like a rocket when there is a plasma stream going.[/quote:2ce9023226] |
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| Pete C.... |
| Posted: Fri Jul 03, 2009 9:49 pm |
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"Martin H. Eastburn" wrote:
[quote:505d42c8d3]
Nicely done.
[/quote:505d42c8d3]
Thanks, it seems to have come out nicely. It only occupies a 3x4
footprint and is designed so I can move it with the forklift or palette
jack if I need to. The water table and enclosure seem to do a good job
of containing any mess. The other plasma torch for cutting down the
sheet to fit the table makes a nice mess on the floor of course.
[quote:505d42c8d3]
One thing I noticed was the return clamp on top!
[/quote:505d42c8d3]
I'm going to put a basic lug connection to the support frame that holds
the slats and use the frame for the return, since I clamp one corner of
the sheet to that frame to eliminate any wiggle in the slats.
[quote:505d42c8d3]
At least you were not near.
I put mine on the bottom with a magnetic twist on attachment.
I use a high percentage of a plate and when possible, I cut out
circles, and rectangles - various shapes - to have steel around.
I cut a lot of AR400 steel and get chunks that the scrap man wont.
I'll make something out of them. The circles I like to use as
steel pads on machine feet.
Spreading the weight over a wider surface.
[/quote:505d42c8d3]
I'll have to put a few more sheets of material on my next steel order. I
need to order some more tube and angle, going to add a perimeter rail to
the roof of my camper, also looking at building a back porch for the
truck / camper combo.
[quote:505d42c8d3]
Looked like a large cane knife being cut.
[/quote:505d42c8d3]
Actually, it was a support slat. The slats that were in the frame in
that pic were just pieces cut from a roll of steel anchor strapping. The
first cutting task was to cut "real" support slats out of 14ga sheet.
[quote:505d42c8d3]
I can't find a knife man around here - he'd love some of the scrap
I have for his forge.
Martin
Pete C. wrote:
"Martin H. Eastburn" wrote:
What kind of table do you have ?
I have one and there are groups in Yahoo. I have PlasmaCam myself.
Martin
I built it to match my needs. Basically compact to not take up my whole
shop and fully enclosed and with water table to not mess up my whole
shop. Powermax 1000, CANDCNC Dragon Cut DTHC controls, Mach3, SheetCAM,
TurboCAD.
http://wpnet.us/first_plasma.wmv
I fired up the CNC plasma table I've been building for the first time
this past weekend I did my test cuts on 14 ga steel at 150 IPM and it
is amazing the time dilation effect that occurs. The gantry moving at
150 IPM during testing seems pretty slow, but that same 150 IPM seems
like a rocket when there is a plasma stream going.[/quote:505d42c8d3] |
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