Belt Sander 2000x50 / 72"x2"

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millwright:
i like the idea of the gas strut Neo Tech, does that provide the sole belt tension ? I am assuming Robs would prob run a compressoin spring inside the square tubing of the main arm?,
.

John

RobWilson:
Looking good Neo :thumbup:

--- Quote from: velocette on January 22, 2016, 03:28:37 PM ---Hi Rob
Good basic ideas for a belt sander one detail that needs consideration is tracking the abrasive band as the idlers will wear unevenly.
The front idler pulley will remove more metal with diagonal slots in the tyre .
Suggest that you do not run the abrasive side of the belt on the tyres .

keep posting
Eric

--- End quote ---

Hi Eric

"A good basic idea " , lets see yours

The tracking wheel and ajuster still needs to be designed as they are clearly not in the photos , and yes there are many different types of contact wheel for different finishes and rates of stock removal.

why I should not run the belt abrasive side on the rubber ?

Cheers Rob

RobWilson:

--- Quote from: millwright on January 22, 2016, 04:56:26 PM ---i like the idea of the gas strut Neo Tech, does that provide the sole belt tension ? I am assuming Robs would prob run a compressoin spring inside the square tubing of the main arm?,
.

John

--- End quote ---

Nope gas strut , unless I can invent a way to have that unattached tracking wheel in the photo suspended free in mid air lol

Rob

Andrew Wildman:
Rob,
I was thinking this may be my next project when I finish the die filer. Looks like you beat me to it...Suppose I better wait a few months before I start mine so I can nick your ideas.

Tuned in. :drool:

NeoTech:
The abrasive side against the rubber is bad idea. Even if the wheel just rotates with the belt it tends to eat em for some reason.

I'm working on a tube attachment letting me cut notches and angles in tubes, and the tube your cutting against is used as the tool for the belt, just let the belt run against bare metal in those cases.

And regarding the gas strut, yeah, you need about 30lbs to get the damn belts to track properly, and that strut there is a 20kg one, i adjust how much pressure the belt has by adjusting the stickout on the tool arm. But struts isnt that progressive in the tensioning they differ like a kilo or so between bottoming out and about a centimeter of compression.

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