Home Made Drum Sander - WIP

[kinsella]

Hi Chaps
Can't see any other examples on the forum (might be my crap searching) but thought i'd share my Work In Progress (WIP) photos. I see others have the same questions regarding motors that i do. Currently working on the body and shaft. See photos.

I also have another topic for the motor which is here
motor-wiring-t89436.html

 

[kinsella]

Latest work. Trying to work out the V belt size at present

 

[kinsella]

This may be a stupid question, but does anyone know which side i should put the pivot for the motor fixing. I want to use the motor as the tension for the belt. On the attached images the motor makes the shaft turn towards you. ie you are looking at the feed side of the table. I'm going to fix the pivot of the motor on the side you can see. Does that sound right?

 

[blackrodd]

Thanks for posting this WIP I'll find this very interesting.
My suggestion, if I understand correctly, regarding the motor mounting is,
check which way the motor rotates first (if you haven't got it) and save a wiring job.
Regards Rodders

 

[frugal]

Out of interest, how do you plan on making all those plywood discs perfectly round and true?

 

[MickCheese]

Out of interest, how do you plan on making all those plywood discs perfectly round and true?

If I were doing it, I would get them to be as round and true as possible then use the bed to sand them perfect. So attach abrasive to the bed and spin them with the motor.

Mick

 

[kinsella]

I'm going to mount them on the shaft and then turn them roughly round, once the bed is made I will then run a board with sandpaper on it under them, this way the disks will be parallel to the bed.

 

[dc_ni]

Check this out, John Heisz made a 2 x 72 belt grinder and on this video he is truing the wheels.

https://www.youtube.com/watch?v=s2dDK6dq3qA&index=2&list=PLkBNR47uEZ7TFAjLyZwCIe6kJjB3lED1-

 

[kinsella]

Thanks Dave.
That was more or less how I'm going to do it.

WIP
Put the disks on the shaft to make sure they were loose enough to move. Fitted the motor. Motor worked out brill, its a water pump so has a very long shaft which was perfect, amazingly the existing mechanism when i reorganised it had two flanges when put back to back had an 18.3mm gap, which fitted my ply section perfectly. How trying to work out the V belt size and order one so i can turn the pulley wheels.

Now glueing up the disks on the shaft. Will take me all week i suspect.

 

[Trigs]

Very brave, good job

 

[kinsella]

Trigs, its more stupidity at the moment. When i attach the Vee belt and press the on-switch, that will determine the bravery level.

I've just printed stencils so that i can add the reminders on the machine. ie feed side and caution labels. There are no anti-kick back so its a machine to stand the to side on and make sure no one else is in the workshop.

Having said that, i reckon it will have cost me £50-80 to build.

 

[Adam9453]

I may be throwing a spanner in the mix but could you add a lower geared roller to the bed to power feed the sander, this should help avoid the dreaded kickback but I appreciate will take some head scratching regarding gear ratio to achieve the desired feed in speed.
Could even have different gears for different feed in speeds if you really want to fry your noodle.
Looks great by the way and i'll be interested to see how it turns out.

 

[kinsella]

Adam,
I could do, but it seems a lot of work to be honest. i see a few of them on youtube, but that may be a future modification. Now got the Vee belt will be working on the drive cams tomorrow.

 

[kinsella]

work in progress.
Managed to work out how to turn the pulleys. Glued up the disks on the shaft and tomorrow to work out how to true the shaft.

 

[kinsella]

Bit of a disaster today, Motor wasn't up it, so had to change to my metal lathe motor. Will now use the older one for a 12" home made disk sander.

But finally mounted the new motor and got the disks more or less round. Next week will be working on the adjustable bed.

 

[MMUK]

http://www.calculatoredge.com/mech/vbelt%20length.htm

 

[kinsella]

Not much done today, just made the bed and put hardwood edging on the plywood frame.

 

[kinsella]

Rise and fall mechanism done, feed bed fitted with knobs to lock into position. All that's left to do now is sand it flat and build some guards to cover the drum and the belt.

 

[mickthetree]

excellent thread kinsella, keep them coming.

What did you use for the central bar? I've seen some people saying certain bars flex too much, but yours looks quite thick. be interested to hear where you got it from as well.

I have my motor ready and hope to start mine soon.

 

[Exile]

great project and its looks well built. I've been meaning to build a small one for some time now but never seem to have the time.

great job