HELP How to control cut 90 degree vs bevels

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Engineering
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HELP How to control cut 90 degree vs bevels

Post by Engineering »

Going to the hive mind on this one... I'm new and have only about 1 hour of cut time under my belt.

I was cutting some trinkets for practice and for the life of me cannot figure out why I keep cutting bevels on my parts. I get a 90 at the top of the cut, but create a bevel at the bottom. After removing dross it almost turns into a knife edge which is unacceptable. Its about a 15 to 20 degree angle.
I put new consumables in the torch, played with feeds & speeds and power source output to no clear solution.

Cut parameters:
16Ga hot rolled sheet
Cutting 30 amps on machine
about 900-1500 mm/min
60-65 PSI at torch
Torchmate table
Jasic Razorweld power source
Tool path created in Fusion 360

If you have any suggestions I'm open.
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ben de lappe
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Re: HELP How to control cut 90 degree vs bevels

Post by ben de lappe »

Could be a torch height issue as the plasma beam is not straight, shaped more like the flame of a candle.
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Beveled Cuts.jpg
robertspark
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Re: HELP How to control cut 90 degree vs bevels

Post by robertspark »

Cut direction?

clockwise for outside offsets (parts).

counter-clockwise for inside offsets (holes).

https://www.hypertherm.com/Download?fil ... &zip=False

+ torch height as Ben said previous.
Engineering
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Re: HELP How to control cut 90 degree vs bevels

Post by Engineering »

Thanks for the replies. I'll run through the set up process again and try optimize torch height.

Thanks for the suggestions.
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