reverse taper
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reverse taper
I need some help. On our plasma table we are currently trying to cut some 1/2 holes on the top side they measure .502 but on the bottom where they rest on the table they are .540. I have never seen it cut wider on the base and narrow on the top, normally it is reversed. Any ideas?
- acourtjester
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Re: reverse taper
may be cutting to low with cut height
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Re: reverse taper
Rather have it big then small!! LOL
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4 X 8 Precision Plasma
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- Gamelord
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Re: reverse taper
Most of the time this is caused by not having the proper cut height.
Once you take flight, your eyes will forever be turned to the sky." "Lack of appreciation is the worlds biggest crime."
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Torchmate CAD
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Re: reverse taper
This is where I get really confused with machine torches. At a lower height wouldn't the torch be more controlled then when lets say you might be .1+ give or take . I have not been able to get a clean 1/2" hole. Really close but not a flush top to bottom hole.
- Capstone
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Re: reverse taper
dava wrote:I need some help. On our plasma table we are currently trying to cut some 1/2 holes on the top side they measure .502 but on the bottom where they rest on the table they are .540. I have never seen it cut wider on the base and narrow on the top, normally it is reversed. Any ideas?
How thick is the metal? There's a rule of thumb when it comes to the size relative to the thickness that can also have a big impact. Jim Colt has a thread on cutting holes and how to improve quality. keyword holes and Colt might get you there.
Phil
It's all relative...
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It's all relative...
CNC Metal Design
Instagram CNC Metal Design
JD Squared 4x8
HT PM45, Miller 251 MIG
- Gamelord
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Re: reverse taper
Another thing may be the direction you are cutting. Clockwise or counter clockwise. One way will put more of the bevel on the drop, the other direction will put more of the bevel on the target piece. Check your cut direction and see if that fixed the issue.
Once you take flight, your eyes will forever be turned to the sky." "Lack of appreciation is the worlds biggest crime."
Torchmate 6x14 w/THC Downdraft
Thermal Dynamics Cutmaster 101
Corel Draw / Adobe Illustrator
Torchmate CAD
Torchmate 6x14 w/THC Downdraft
Thermal Dynamics Cutmaster 101
Corel Draw / Adobe Illustrator
Torchmate CAD
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Re: reverse taper
you also need to post :
table brand
plasma cutter brand
material being cut
cuts spec
that way it will narrow down the issues your having.
also pics of piece might help as well.
nozzle ,electrode worn? shield worn/plugged
is taper consistent in hole? only in the smaller holes?
have you checked cut height with book spec? reduced speed , turn thc off
more info will steer you to better answers
table brand
plasma cutter brand
material being cut
cuts spec
that way it will narrow down the issues your having.
also pics of piece might help as well.
nozzle ,electrode worn? shield worn/plugged
is taper consistent in hole? only in the smaller holes?
have you checked cut height with book spec? reduced speed , turn thc off
more info will steer you to better answers
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Re: reverse taper
Yes...I would like to know what cutter you are getting a reverse taper with.....as this would be a major breakthrough in plasma cutting. Normally the bottom of the hole is smaller than the top! What gases, what thickness material, etc.
Jim Colt Hypertherm
Jim Colt Hypertherm
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Re: reverse taper
It was with stainless 304 1/4" the speed was set too slow on the cut, We are using an ALLtra plasma cutter.
Do you have any suggestions for reducing taper on holes and improving quality on 304. We were told by the techs to overcut the holes.
Do you have any suggestions for reducing taper on holes and improving quality on 304. We were told by the techs to overcut the holes.