600 mm Drum Sander

**chambezio** · 24th May 2015, 06:45 PM

I can hardly believe it but today I can say that the project is finished or is it just beginning
Four + years ago I built a drum sander that was loosely based on the Sand Flee
It was a sanding drum 125mm diameter, driven by a 2 Hp motor, that you pysically pushed your piece over the drum which only just protruded through the bench top. Even before I had finished this thing I decided that it needed a conveyor belt to pull the piece,that needed sanding, past the drum. So I shelved the whole deal.
I got a bit of interest/enthusiasm and started to look at the web trying to find information on how to go about making a conveyor belt. Did not find any thing!!! So next was to glean Ebay. What came up was a motor with right angle drive coupled to it and also connected to a VSD. It had been connected to a Fire Curtain in a public hall. The Electrician that decommissioned it had it for sale.
Well things (enthusiasm)halted until early this year. I nutted out a design, no drawings just cut this welded that.....and it was ready for the drive. VernonV in Armidale was good enough to modify the original electrical set up so that I could use it on the conveyor.
The short story is that today I sorted out some minor teething problems and the thing works!!Here are some photos of the finished article
The photos show the Sanding Belt I used for the Conveyor Belt, The 240 Volt 2Hp motor that drives the drum and the 415Volt Motor coupled to the right angle drive. Its speed is controlled by a VSD that also gives me forward and reverse of the Conveyor.

**safari** · 24th May 2015, 08:56 PM

Great work Chambezio! looks terrific. Am I right in thinking that the belt feeds wood through OK without the need for feedin/feedout rollers?

**chambezio** · 24th May 2015, 10:19 PM

Yep. You sit your board on the red belt and it then carries it under the drum. The conveyor is a sanding belt of 120 grit and it travels very slowly under the drum which is set to only just touch the piece being sanded. It seems that the centrifugal force "lifts" the paper on the drum and in so doing reduces the amount of heat generated and allows the paper a longer life. At the moment I have 120 grit on the drum held on with velcro
The Sandpaper Man supplied the velcro paper and the conveyor belt as well.

**Evanism** · 25th May 2015, 10:49 AM

With Beetroot Can dust extraction!

With speed stripes and coolness enhancement too

tumblr_kybklp9JpL1qavfnq.png

**safari** · 25th May 2015, 11:44 AM

Thanks Chambezio. I am putting together ideas before I have a go at building one and after having a look at Hare and Forbes's and Carbatec's models which all have infeed and outfeed rollers I was thinking that they would be necessary. Sure makes things easier.

**chambezio** · 26th May 2015, 10:13 AM

Safari....When I was thinking of a design the store-bought ones conveyor/platen had a very short distance to sit your job on. I envisaged having a number of boards(production run) to run through and not being able to load one after another because you would be having only enough room to do one at a time.

I have seen, on one blokes version, having pressure rollers either side of the drum. At the moment I don't think it is necessary but I haven't as yet done anything other than put single samples through it.

And for Evan....its not a beetroot can, its a sliced peaches can. Its a need fit for 4" flexy to go straight on. I intend to use a mobile 1Hp dusty to control the dust because I haven't figured out where it will live. Ideally it should be placed under the ducting of my central system Hp Cyclone system.

**aldav** · 26th May 2015, 06:59 PM

Fantastic effort chembezio.

Just goes to show what good old Aussie ingenuity can do!

When I worked in the scrap yard we used to sell a heap of those geared 90 degree drive motors, never scrapped one unless it was dead or damaged. Of course now that Sims has taken over they all go to scrap. What a waste! There's just something wrong about that.

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