Motoman Robot

[jruvalcaba]

I am having issues with this motoman robot MRC, its a MiG welding robot,  I have increase the heat, gas, timing,wire feed, and the position of the gun, its welding on a 14 gauge steel, and it still looks like a cold weld, it burns a hole on the material so, I adjusted to where is welding is OK but not the greatest. when it finishes welding it leaves burn steel on top of the fixture. I don't know what else to do!! if I lower the heat the welds come right of, I welded this piece of steel on the manual welder and it is perfect. plus the equipment on this robot is 20 years old, if any body has any suggestion i will appreciate the responds.

Regards

[roboprof]

Could you please provide information to help us diagnose the problem, such as:
- type of welder
- size of wire and type of wire
- welding parameters (voltage and current/wire feed speed)
- type of shielding gas

Thank you 

[jruvalcaba]

Type of welder, Hobart Arc Master 501.
Wire size, .035mm.
Voltage and wire feed, 100.
Type of gas, the company's name Air Gas

[rzapo]

what type of material you weld, and what type of gas compozition you have...?

[jruvalcaba]

I'm welding a 14 gauge, to a 18 gauge steel plate. the type of gas we use is Argon & CO2, the gauge that feeds the robot is set to 39 PSI.

[roboprof]

here are a couple of things I would try....

1)  Please make sure that the welder is in remote mode (ie. that it is being controlled by the robot, and not by the settings on the front of the welder).

2)  I am not sure if you are using ARCON files or in-line instructions, but for what you are wanting to weld, and the argon/co2 combo that you using, you should set the voltage around 26 volts and the wire feed speed around 450ipm or the amperage in the 240 - 250 amps range to get a decent spray transfer weld.  Try using these settings in your arc start file or in-line arc start and see what happens.  100A or 100IPM is way too low for an amperage or wire feed speed setting....

3)  Also, once you start welding, look at what the welder is actually giving you by means of the digital readout (if there is one). 

Let us know how it goes.  Hobart welders were known for being fairly bullet-proof but with the age of the system, it may be the welder.... or wire feeder.... or interface card..... but you have to start troubleshooting somewhere.

Best of luck to you and keep us updated please.  Thanks!