I'm having trouble welding the inner corners of my material. Welding material is sometimes deposited on either one side or both sides, but never really connecting the two parts.
Side/flat welds work fine:
But those pesky inner corners don't:
The material I'm using is 1mm thick 16x16mm square steel tubing. Welding settings are 20 Amps DC electrode positive and welding electrode is 1.6mm steel.
Am I doing something wrong? Is there a trick to this I'm missing?