I'm working on an MRC control with a K6 arm, Hobart HUWI interface and Hobart Arc Master 351 power supply. This system was in storage for a few years and I have been asked to help get it up and running.
We have most things up and running and are doing some test welds but seem to not have control of the wire speed. I have set up the welder condition file per an old Hobart document I found.
When I use the wire retract/feed buttons on the pendant thing work and the speed changes with the High Spd button depressed.
If I turn output 127 on and set a wire speed with the Arccur command in a program I can make the wire speed respond to command.
When I use an arcstart condition file in a weld job, the travel speed and arc voltage are fine, but the wire speed is slow and does not respond to command changes. I have verified that the MEW board is sending an analog signal to the Hobart interface and it changes proportionally to the command in the arc start file.
There are some diagnostic LED's on the Hobart interface and they show that the wire feeder is in "Inch" mode when running from the arc start file and in "Run" mode when driven by turning on output 127. This corresponds with the results I am seeing.
Does anyone have any thoughts on this?