This sandpaper study is emblematic of a real scientific attempt to answer a question. The criticism of the study is typical and important to the scientific method. Studies are never ¡°perfect¡± to all eyes. Open debate is critical. External influences also need to be examined. So, gripe away. This hones our perspective of the project. However, in the final analysis, how it works for each of us is the real test. But at least now I have an idea about what to try. ?I have to?applaud?this guy¡¯s effort.
Mark
toggle quoted message
Show quoted text
On Dec 6, 2021, at 10:38 AM, marty shultz <
azmartys@...> wrote:
Having spent some of my career designing and running experiments I can see flaws in his experimental process. I thought about running my own test.? I'd like to see additional factors like: Grain (open vs closed grain),? Hardness, With/without vacuum extraction, Force (heavy vs light), and say 5 additional professional sandpaper types. I'd like to measure how the paper does when sanding glue joints.? Does it clog up fast???
To run a 1/4 fraction factorial experiment with five factors and four randomized replicates would take 32 trials.? But that only tests two different sandpaper types and would take 16 hours of? sanding time.??I would spend more time testing than I'd spend sanding all my projects in a year.? ??
While imperfect, the robot likely applies constant force which would be a big factor in stock removal.? Maintaining constant pressure is something I would have difficulty doing in my shop.? ?
I read a lot of reviews after I posted the link and some people are having problems keeping the sandpaper on the sander.? They complain that the look and loop isn't satisfactory.? It may require a new backer pad.? I'm going to try Xtract a try and see how it works for me. I'll post my anecdotal thoughts later.?
Other people have said his prices aren't the same as they get.? The author commented that he bought 50 packs and used the price on his receipt.? Maybe he didn't shop for the best prices like us penny pinchers do :)??
Cheers,
Marty
