cnc plasma table

[nakodasteel]

Dear Jim

Hi i am rohit mehta from nakoda steel. Regards to you for your prompt replies. I installed my machinery in November 2009 from Hypertherm distributor in India SYSTEM ENGINEERS.
Since i have installed machinery i am facing problems of angularity( taper) , very low consumables life and wavy cut

i usually have to cut mild steel only on my machine which has taper or say angularity of 5 to 8 mm in a 8 mm mild steel plate and increases as the sheet thickness increases.
i want to know how much thickness of stainless steel can the system cut?

i have mailed many people in system engineers. the whole team of system engineers have come here to my factory. but no conclusion. finally they have taken a sample of nozzle(120927), Electrode(120926), Retaining cap(120928) and Shield(120930) and also the cutting samples. I am really like what to do .. how to get my machine get proper. can you help me on that?


regards
Rohit Mehta
Nakoda Steel
909 & 949, GIDC, Waghodia
Dist.Vadodara 391760
Gujarat, India.
rht.mehta02@gmail.com
Nakoa Products :: Manufaturing of power and distibution transformer
M: +919925062087
M: (USA) -716-254-2540
W: 02668 262409

[jimcolt]

That amount of taper is extremely bad for any plate thickness.....in fact I'm not sure if I could reproduce that much taper in a cut edge even if I did everything incorrectly!

If you can provide me with details for your equipment.

1. Torch height control system....what brand and model. How does its find the surface of the plate before each cut cycle?

2. On 8mm plate what are your settings for:

a. Initial pierce height?
b. Pierce delay time?
c. Cut height?

3. Does your height control use arc voltage feedback to control torch height during steady state cutting?

4. What plasma system are you using. Please list the consumable set you are using for cutting 8 mm plate and power level setting?

The only way that I would expect to get the bad angularity that you are experiencing.....would be if you were damaging the nozzle orifice by piercing too close to the plate, and or you were cutting with a grossly incorrect cut height.

Pictures of a used electrode , shield and nozzle that were producing the bad angularity will help. I need to see a closeup of the exit orifice of the nozzle and shield as well as the emitter end of the electrode.

Jim Colt Hypertherm

[nakodasteel]

I have a problem with my hypertherm 1250
my hypertherm cpu that reads microedge often shuts down and i have to wait for a while to get it started. i am unable to find a reason behind the same. It works properly for about half and hour and then it shuts down itself. then i cannot restart it again. i have to wait for about 15 to 20 odd minutes and then again when i try to restart, it works. i am facing this problem since last few weeks and i m not able to find the reason behind it. can you please put some light on it.

[jimcolt]

The Hypertherm Powermax1250 is an 80 Amp air plasma....I think you are referring to the Hypertherm MicroEdge CNC control that is exhibiting a problem. I suggest contacting Hypertherm tech service directly...the service is free and the technicians are very good at helping you sort out issues such as this. The Hypertherm CNC's (newer models) have the ability to get online and let our factory techs link directly into the control for troubleshooting. To contact tech service go to Hypertherm | Plasma Cutters | Plasma Cutting Equipment | Metal Cutting Equipment.

Jim Colt

I have a problem with my hypertherm 1250
my hypertherm cpu that reads microedge often shuts down and i have to wait for a while to get it started. i am unable to find a reason behind the same. It works properly for about half and hour and then it shuts down itself. then i cannot restart it again. i have to wait for about 15 to 20 odd minutes and then again when i try to restart, it works. i am facing this problem since last few weeks and i m not able to find the reason behind it. can you please put some light on it.