Recently, we have been allowed to borrow a planex drywall sander from a local rep to test and see how it works before continuing with a purchase, as this is not a cheap machine we do not want to sink money into something that doesn't do that job.
So, firstly, our drywall taping job is at finish sand stage. So we are trying to sand and turn over to painters. We attempted using 240 grit and also 320. No matter what we use we constantly have scratches all through our work. They go in a circular pattern just the same as the head on the sander. We have tried various settings on the machine, lowered speeds and suctions, tried them both at medium levels (3 for speed and 3 as well for suction). Nothing we seem to do works, and before we give up entirely on this machine I'd like to hear from someone who has it and uses it regularly, to see what we could be doing wrong that leaves us with these circular pattern scratches?.
We normally run 10 and 12 inch coating boxes for coating our tapes. This time around sadly we had to use only a 10 inch box for a base fill coat, then we did final skim coat by hand. All skim coat has been done with CGC Machine Mudd. Does the mud used make a difference? is the planex best used on all-purpose mud or does this even play a factor in the way it sands? I imagine the mud type shouldn't matter, though I understand Machine Mudd is far softer then an all purpose mud.
We had our quality control guy come in and have a look at these scratches and he informed us they were not going to pass inspection, nor would primer or paint seal them, and was confident they would show through the paint on finished walls. Clearly, this is not acceptable for us, so any help would be appreciated, as we would very much like to get it going and give it another shot tomorrow.
Thanks.
So, firstly, our drywall taping job is at finish sand stage. So we are trying to sand and turn over to painters. We attempted using 240 grit and also 320. No matter what we use we constantly have scratches all through our work. They go in a circular pattern just the same as the head on the sander. We have tried various settings on the machine, lowered speeds and suctions, tried them both at medium levels (3 for speed and 3 as well for suction). Nothing we seem to do works, and before we give up entirely on this machine I'd like to hear from someone who has it and uses it regularly, to see what we could be doing wrong that leaves us with these circular pattern scratches?.
We normally run 10 and 12 inch coating boxes for coating our tapes. This time around sadly we had to use only a 10 inch box for a base fill coat, then we did final skim coat by hand. All skim coat has been done with CGC Machine Mudd. Does the mud used make a difference? is the planex best used on all-purpose mud or does this even play a factor in the way it sands? I imagine the mud type shouldn't matter, though I understand Machine Mudd is far softer then an all purpose mud.
We had our quality control guy come in and have a look at these scratches and he informed us they were not going to pass inspection, nor would primer or paint seal them, and was confident they would show through the paint on finished walls. Clearly, this is not acceptable for us, so any help would be appreciated, as we would very much like to get it going and give it another shot tomorrow.
Thanks.
