MIG Gun Guide
Use these simple diagrams to inform the way you use your MIG gun
![Chart of various back end connectors and trigger leads Back End Connector and Control Wires](http://www.nbrren.com/medias/1-MIG21.jpg?context=bWFzdGVyfHJvb3R8MTUzNjg2fGltYWdlL2pwZWd8aDc0L2hjNS8xMTU0NTc5OTM2MDU0Mi5qcGd8YTNiNzAwZWNhMDAwZTVkN2JjOTRiYzkwZWQ4NjRhODExNTNmZTgwODliYWVmOTRkNzhkNGQ5OTQ0MmI5ODM0Ng)
Selecting a Cooling System
When deciding between a water- or air-cooled MIG gun, there are a few factors you should consider. Specifically, you should focus on the application and amperage requirements, welding operator’s preference and cost considerations. Read more onAirgas Thinks.
Travel Speed
- Incorrect travel speeds can cause discontinuities and rejectable welds
- Travel speeds affects penetration and weld bead shape
Gun angles and positions
- Help shape the weld bead
- Help determine the penetration
![Travel Speed graphics Travel speed and penetration](http://www.nbrren.com/medias/6-MIG21.jpg?context=bWFzdGVyfHJvb3R8NzgwNzl8aW1hZ2UvanBlZ3xoMzMvaDY1LzExNTQ1ODAxMDY0NDc4LmpwZ3w2YmEzOWQyZTgwMjI1MjRhMGZjZjYyNzcyNDgzNjQ4NTU2OGUyMDIwMWM2MmI1MzVkMjE0ZGI3YzQ3ODEyZWI5)