On Feb 17, 2022, at 7:47 AM, Mark Kessler via groups.io <mkessler10@...> wrote:

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Thanks LIoyd for the info, so the belts you have are all cloth backed?

The sander comes with a few used 100 a 60 and 1 new 120.?

Are you able to sand commercial veneers that are glued to ply or MDF on your machine, i am assuming that can’t be done but you mentioned ply below. I am aware that if it is to be tried/done that you want to first calibrate the substrate first with the contact head only.?

You certainly know more than me about this but have you seen this on wide belt chatter??

Regards, Mark

On Feb 16, 2022, at 11:54 PM, sl <lloydn@...> wrote:

?I have the same sander.? 120 is too fine to remove resaw blade marks- it'll take too many passes and prematurely wear out the belt. I use 80 for rough sizing and removing saw marks and tear out but 100 will work if you don't want to buy so many grits.?

Platen is almost always up, out of the way.

Even with 180 and the platen down,? the seam in the belt leaves a regular mark, a sort of soft 'chatter ' that I sand out with a belt sander (180 for most, 150 for oaks)? that has the sheet metal plate replaced with a cork pad+ graphite canvas.? This requires practice but is way faster and flatter than an orbital sander.

This chatter mark is most visible on horizontal surfaces with darker coloration and some sheen.

Start with 100, 120 and 150 and see how it goes.?

Integrated digital readout and positioning controller speeds things up.? The dealer installed an Accurate system.

Feeding parts at a slight angle helps to spread the wear on the belt out.? I only use the fast feed speed on soft woods or lightweight plywood/ mdf.

Mine is 22 years old and I've only had to replace one switch and trouble shoot a safety interlock switch that I knocked out of position.? The SCM folks were very helpful walking me thru the troubleshooting and I have only basic facility with a multimeter.?

Regards

Lloyd Natof