ht 2000

[junkdog]

i was wondering if you guys might be able to help me to answer a few questions
i am new to this plasma game i have a cnc router for 10 years now but plasma is new to me

i have a ht 2000 lhf plasma on a precision cutting systems machine with an adtech controller
i think its a burny knock off not sure
some issues the arc doesnt always start it just has a little arc then goes out especially if i am cutting thin material
11 guage to 3/16
at the higher amperages 200 it always seems to work 100 amp o2 and air it seems to have trouble firing
but the" arc on" about three inches above plate always fires (test )
i also have some issues with cutting squares in the picture 25 mm across i am ok in the middle but in the corners it is wide about 1 mm sort of a belly in the middle of the square
not sure what the problem is

100 amp o2 air consumables as recomended by hypotherm
tried several speeds
2000 mmpm
3000mmpm
4000mmpm
5000mmpm

i am wondering if i need to maybe change the pilot relay

the last question the thickness of the kerf seems to bee about 1/8 or about 3mm
so do i need finecut consumables to achieve thinner kerfs on thin materials
to be able to make some of the awsome artwork on this forum

[jimcolt]

For the misfiring issue...

-Make sure you are using genuine Hypertherm consumables.....misfiring with aftermarket consumables is very common.
-Make sure you are setting plasma and shield gas flow settings EXACTLY as outlined in the operators manual cut charts, misfiring will occure if these are not set as the cut charts suggest.
-Be sure your height control is accurately setting the pierce height and cut height. If pierce height is too close, or too far, expect misfires.
-If you are 100% sure all is being done correctly as listed above, contact Hypertherm tech service and they will help you troubleshoot.

For best cut quality on thin materials use the 50 amp oxygen/oxygen consumables and follow the cut specs in the opertaors manual.

jim Colt Hypertherm

i was wondering if you guys might be able to help me to answer a few questions
i am new to this plasma game i have a cnc router for 10 years now but plasma is new to me

i have a ht 2000 lhf plasma on a precision cutting systems machine with an adtech controller
i think its a burny knock off not sure
some issues the arc doesnt always start it just has a little arc then goes out especially if i am cutting thin material
11 guage to 3/16
at the higher amperages 200 it always seems to work 100 amp o2 and air it seems to have trouble firing
but the" arc on" about three inches above plate always fires (test )
i also have some issues with cutting squares in the picture 25 mm across i am ok in the middle but in the corners it is wide about 1 mm sort of a belly in the middle of the square
not sure what the problem is

100 amp o2 air consumables as recomended by hypotherm
tried several speeds
2000 mmpm
3000mmpm
4000mmpm
5000mmpm

i am wondering if i need to maybe change the pilot relay

the last question the thickness of the kerf seems to bee about 1/8 or about 3mm
so do i need finecut consumables to achieve thinner kerfs on thin materials
to be able to make some of the awsome artwork on this forum

[junkdog]

thanks for the reply

i am using the genuine deal
gas is as the manual says
i will check the pierce height and cut height are set correctly (could be the culprit )

any ideas on the washout in the corner of my square
change of height in the corner perhaps
change of speed in the corner
maybe the question should be what is the optimum controller settings for cutting corners

straight cut
slow for corner
hieght freeze
cut corner
height freeze off
resume speed

any info would be great

Bryant

[jimcolt]

Washout in the corners is cuased by:
-Machine slowing too much in corners. I don't know anything about your machine.....some machines have poor acceleration, some have great acceleration. The ones with great acceleration do better in corners. You can try increasing corner speed or acceleration settings...if you go too high you will see wavy lines exiting corners.
-Too much power. To cut 11 gau and 3/16" you need to use the 50 amps consumables. 100 amps is way to high for best quality.
-If height is diving in corners then you need to ensure that the anti dive functions in your cnc or height control are set correctly. The height control on most cnc machines will automatically freeze when the machine goes into decel for corners...this eliminates diving which will affact quality.

Jim Colt Hypertherm

[junkdog]

thanks for your response
changing some settings in my controller to do with the arc stating process has fixed my starting problems

machine does slow a lot in the corners will be addressing that today
what percentage of regular cutting speed should i slow it down to

i read in jim colts pdf about small circles that less that 1 in diameter 60 % reg speed
i have read in other posts that 20% reduction is sufficient
looking for starting point(pun intended)

i will also be ordering up some finecut comsumables

question what happens if i put 100 amp consumables in and turn down the current
answer the arc density will not be proper (searched it myself i did )

thanks for your time


Bryant

[jimcolt]

There are no "finecut" consumables for an HT2000. Use the 50 amps oxygen consumables and follow the specs in the manual.

Reducing the amperage on any set of consumables (less than the consumable amperage rating) reduces the energy density and velocity of the arc. Bad angularity and dross are the result. All plasma consumables should be operated at their design amperage....unless the operators manual suggests something else!

Bes cut speed for holes under 1" is 60% of the book speeds.


Jim Colt

thanks for your response
changing some settings in my controller to do with the arc stating process has fixed my starting problems

machine does slow a lot in the corners will be addressing that today
what percentage of regular cutting speed should i slow it down to

i read in jim colts pdf about small circles that less that 1 in diameter 60 % reg speed
i have read in other posts that 20% reduction is sufficient
looking for starting point(pun intended)

i will also be ordering up some finecut comsumables

question what happens if i put 100 amp consumables in and turn down the current
answer the arc density will not be proper (searched it myself i did )

thanks for your time


Bryant