Widebelt Sander Gets Straightened Out
I went shopping for new tools last year after my fire. One of my best finds is a 36″ AEM (now TimeSavers) widebelt sander, affectionately known in the shop as the “FriendMaker”. It is a 20hp wood-eating machine that is in great shape for its age. I would say it is perfect, or at least now I would. The only problem that I found after I ran it was a groove or three in the front sanding drum. I didn’t know a lot about this sander and told myself that it would be alright if the drum wasn’t flat because the platen, which is a flat bar that presses the sandpaper to the wood would smooth things out. And it did (kind of), when it wasn’t falling apart.
The TimeSaver was costing me time (and money) with these deep grooves.
The platen is a piece of aluminum about 37″ long and 1-1/2″ wide. It has a piece of stout felt attached to it that is covered with a separate piece of graphite fabric. The graphite reduces the friction and allows the machine to apply pressure to the backside of the sandpaper without burning through everything. The sander had the platen in it when I got it, and I assumed that it should be in there all the time, so I used it all the time. I was getting decent results, even with the grooves in the front drum, but I was going through graphite and felt quickly. I had to baby the machine and the graphite was still wearing out. I finally broke down and called TimeSavers to talk to a tech guy.
The good news was that the tech guy knew what he was talking about. The bad news was that he assumed I did to, even after I told him that the machine was new to me, that I had never used it or one like it before and that he should assume that I knew nothing about it. It took me close to a half an hour of going back and forth to finally figure out that it isn’t necessary to use the platen all the time. If I wanted, I could run it without the platen. Well, now I was listening (not that I wasn’t before). Turns out that the platen is for finish sanding and shouldn’t be used to take off more than .005″ at a time. It was for smoother grits, like 150 and up. The platen spreads out the sanding pressure to keep the sanding scratches from going too deep. Good to know.
Now things started to make sense. I had read that my sander could take up to 1/8″ per pass on rougher grits. That was a crazy number compared to .005″, and I am all about crazy. If I could take that much off at a time it would be a real game changer for me. The problem I faced with my new aggressive sanding technique was that the front drum, which is rubber coated, had those grooves in it that I mentioned earlier. Smaller pieces could run through and avoid the bad spots, but bigger pieces couldn’t. And many times the smaller pieces would drift into the zone with the groove and come out with high spots. I wanted to fix it, but it looked like a daunting task. There is no obvious way to get the drum out, and I had heard that redoing the drum would cost thousands. As much as I am all about crazy, I am also about cheap. Thousands for a resurfaced drum was not in the cards for a machine that I got for $2,500.
So, I coasted. I used the sander almost every day and tried to avoid the bad spots. I even put the platen in when it was vital for the part to be flat. No matter how careful I was, parts would still come out with hidden ridges, the sneaky kind that only show up in the finish, when you want them the least. I kept coasting until, out of pure coincidence, the guy that sold the exact machine to the original owner stopped by my shop trying to sell me new machinery. He asked me how the sander was working, and I told him about the drum and the grooves that were ruining my life. He casually mentioned that I could “dress the drum” if there was enough of it left. He took a look at it and assured me that I could fix the drum on my own. All I had to do was search the internet for info and videos on “dressing the drum”.
Searching I went. No videos. The only thing I found was one posting on WoodWeb about how to dress the drum. I was really hoping for a video because I wasn’t in a hurry to destroy the drum and mandate the purchase of a new one. However, the one posting was all I could find. I read it and it made sense, so I stopped looking and decided to give it a whirl. It ended up being quite easy and intuitive. I just never would have thought of sanding the rubber drum on my own, but once I knew it was an option it all made sense.
Because I couldn’t find a video on how to do it I decided to make my own. I’ve been wanting to start making videos because I think the videos can be a lot clearer than still shots. I don’t like seeing or hearing myself, but I decided it is something I just need to work through. So, here it is, my video on “Dressing the Drum on a Widebelt Sander” (just click the photo of the sander below). Next up is a full-time, non-judgemental cameraman.
Click the photo above to see how to dress a drum on a widebelt sander.
The premise of the whole event is that a flat board covered with sandpaper is sent through the machine (with the sanding belt removed) and sands the rubber drum smooth. It starts with a new 36 grit sanding belt and a piece of 1/2″ thick MDF with radiused leading edges. The width of the MDF is determined by the throat opening of the machine and what is the widest piece that will fit through it. In my case, it is about 39″ wide. The length of the MDF is based on the width of the sandpaper minus 2″. The minus 2″ is so the paper can completely cover the two radiused edges. My paper is 37″ wide, so the MDF is 35″ long. The new sanding belt that is applied to the MDF runs at a 90 degree angle or perpendicular to the way it normally runs. Doing this allows the MDF to be a little wider than the drum and to be sure the drum gets completely sanded on each pass. The key is to have a wide, flat, consistent-thickness sanding block to send through the machine. After the MDF and sandpaper are cut, apply the sandpaper to the MDF with spray adhesive (3M SUPER 77) and trim everything flush.
I was instructed on WoodWeb to use a high feed speed, low grit and very shallow cuts since the rubber could just melt instead of being sanded. It didn’t take long. I took light passes and was done way before I got the video shot. In all, I only sent the MDF sandpaper block through 10 times to remove the 1/16″ deep grooves.
Now, I use the drum all the time and never use the platen. I consistently and confidently take of 1/16″ or more per pass (even on wide stuff) with the 36 grit and 1/64″ with the 100 grit. It is amazing how different my life has been since I “dressed the drum” on my sander.
Giant Sycamore Almost Crushes Truck
Last week, I was asked to speak at the annual conference for the Midwest Chapter of the International Society of Arboriculture (a surprisingly lively bunch). While I was working on my presentation and looking through old photos, I came across photos of the kitchen at our last house and was reminded of a story that I think is worth retelling. The kitchen at our last house was made from quartersawn sycamore and all of it came from one giant log. This is the story of that giant log.
One day I was out looking for logs and stopped by St. Louis Composting, where they see a lot of logs that they turn into mulch. Every time I have been there I can have my pick of logs as long as they are not desirable in any way to anyone else, especially someone who might pay for them. That normally leaves me with short, rotten, crooked, hollow and busted pieces from undesirable species of trees (mostly sweetgum, pin oak and cottonwood). But this day I got lucky. I found a log that looked bad on the outside, but was great on the inside.
It certainly did not look like a log of my dreams, but it caught my attention because it was big. For some reason, probably because it was so big, no one had cut it to firewood length yet. From all aspects it deserved it. The log was old and gray with no bark and plenty of cracks, and it was rotten in spots. Maybe it wasn’t cut up yet because everyone thought it was too rotten or because they somehow knew it was a sycamore and thought it wasn’t good enough for firewood (you would be surprised how snobby people are about their firewood, even when it is free).
No matter what the reason, it was there. It was long too. Big and long, now you really have my attention. The log was 13 feet long and scaled at about 1,000 bd. ft. It was giant.
I knew right away I wanted it. Heck, as long as it wasn’t a cottonwood, pin oak or sweet gum I wanted it. But, I also knew that my crane wouldn’t pick it up. Luckily, they have very big loaders at St. Louis Composting and for $20 they agreed to load it for me. After I paid the loader operator he scurried over with the loader and scooped the log with his bucket. The log didn’t fit in the bucket, but it rested nicely on the front while he maneuvered over to my truck. This guy apparently had a lot of other material to move and was in a hurry. He moved quickly to the side of my truck, but slowed down like I expected when he got close.
What I didn’t expect him to do was to dump the log on my truck from a couple of feet in the air. When he did, I sank to my knees, all the way to my knees, completely in sync with my truck. Both of us quickly squatted to the ground and very slowly bounced back up. “Holy S—,” I thought. My heart was jumping out of my chest. I couldn’t believe it. Was it this dudes first day? I was sure that my truck was now destroyed, if not permanently disfigured. There was just no way on this great earth of ours that my old 1977 Chevy C60 could take a hit like that. But, somehow it did, and it bounced back.
My first thought (once I could breathe) was to ask for my $20 back, but as far as I could tell nothing was broke. I knew my truck could handle a lot of weight, I just didn’t think it could take it all at once and with such force, but I guess I was wrong. I threw some straps on the log and headed back.
On the way back I was something to see. I felt like the coolest kid in school. I could feel everyone staring at me. Ill-informed do-gooder dads were pointing out my truck to the kids in the back seat and explaining how long it takes a (insert tree name here, as long as it isn’t sycamore, or it won’t be funny) tree to get to that size. Policeman were stopping gawkers at intersections worried that they might be too distracted by looking at my huge log (could have gone so many ways with that one). Other drivers pulled up next to me and yelled, “Did you load that yourself?” By the way, that last one really happened. All was right with the world. At least for a time.
When I got back to the sawmill, I jumped out to open the gate and noticed a smell of something burning… maybe rubber, I thought. I took a walk around my truck and all six of my tires were still good. The smell got stronger when I came back around to the front of the truck, and now smoke was coming out of the front end from under the hood. Quickly, like a really slow jack rabbit, I opened the hood and jumped up on my bumper to see what was burning. To my surprise, it was the battery, but I wasn’t surprised to see why. The battery was now laying on my exhaust manifold. The truck was bounced so hard that the battery (which was not properly secured) was flung out of the battery tray and onto the exhaust manifold and it was very melty.
That guy at St. Louis Composting with that giant loader managed to dislodge my battery from its cute little tray with one whack. In all of the time I have driven this truck (all without the battery properly secured) it has never popped out of that tray. And, I have hit some big bumps, many of them way too hard and way too fast and the battery has always stayed put. I just wish I had some video of it, so I could see my truck go all the way to the ground and bounce back up and say, “Thank you, Sir. May I have another?”
After it was all said and done, I had a new battery and after even more was said and done I had new kitchen full of cabinets made from one giant sycamore log.
Here I am milling the sycamore on my Lucas sawmill.
Cabinets are spalted-quartersawn sycamore, the floor is Ambrosia maple.
What’s Going on at WunderWoods
Everyone always asks what I do. Here's the answer. Click on the photo above for a short video tour and see all of the steps it takes to go from a tree to finished furniture.