Official Luthiers Forum!

Lance or anyone else with this jig,
I just got my Luthiers Friend/Robo Sander today. Seems pretty neat...one question... what are the two holes on the left side for?


THANKS FOLKS

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Dave Bland

remember...

"If it doesn't play in tune...it's just pretty wood"

I have one too, but haven't used it yet. Don't know what the holes are for. Sorry
Tracy

I just got it, also. I assumed the large one was for bolting it down or hanging it on the wall. The small one is for storing the robo-sander attachment.

I'm actually kind of dissapointed with the sanding drum. It has runout of about 1/16 inch. It seems to be from a combination of a crooked bolt and unround rubber drums. Anyone else have this problem?

Scott Thompson38470.0158101852

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Scott Thompson
Port Townsend,WA

"In a perfect world we'd all sing in tune
But this is reality so give me some room"
-Billy Bragg

[QUOTE=Scott Thompson] I just got it, also. I assumed the large one was for bolting it down or hanging it on the wall. The small one is for storing the robo-sander attachment.

I'm actually kind of dissapointed with the sanding drum. It has runout of about 1/16 inch. It seems to be from a combination of a crooked bolt and unround rubber drums. Anyone else have this problem?

[/QUOTE]

Scott- Have you spoken to Ken about this? Mine does not have that problem.

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Lance@LuthiersForum.com

[QUOTE=Scott Thompson] I just got it, also. I assumed the large one was for bolting it down or hanging it on the wall. The small one is for storing the robo-sander attachment.

I'm actually kind of dissapointed with the sanding drum. It has runout of about 1/16 inch. It seems to be from a combination of a crooked bolt and unround rubber drums. Anyone else have this problem?

[/QUOTE]


Are you sure the run out is not from your drill press?

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Brock Poling
Columbus, Ohio
http://www.polingguitars.com

Hey guys,

Don’t mean to highjack the topic here but…
If I’m correct in my assumption (that the “luthiers friend/robosander” gets chucked into your drill press) then is there any concern with premature wear on the drill press bearings? Sure normal up and down drilling motion wouldn’t be of any bearing concern but what about the side load due to pressure against the drum?

Thanks,
Jeremy

Good Point Jeremy. I am using mine in a low cost Delta table top drill press...so for the moment not too worried about the bearings. I suppose when it messes up one of my pieces I will be

_________________
Dave Bland

remember...

"If it doesn't play in tune...it's just pretty wood"

Don't try to hog off a bunch at a time the side load won't be extrem. This not intended to be a heavy duty sander/shaper. But it is a great tool for small jobs like thichnessing bindings, bridges and such. I built my own but bought Robo drums for it and my run out is very very minumal if not non existant. but I don't try to hog material.

[QUOTE=JeremyC] Hey guys,

Don’t mean to highjack the topic here but…
If I’m correct in my assumption (that the “luthiers friend/robosander” gets chucked into your drill press) then is there any concern with premature wear on the drill press bearings? Sure normal up and down drilling motion wouldn’t be of any bearing concern but what about the side load due to pressure against the drum?
[/QUOTE]

One thing that minimizes that risk is that the bearing at the bottom of the drum is supported by the recess in the table. That coupled with not having the quill extended any farther than necessary puts minimum sideways pressure on the quill. etc for light duty sanding.

_________________
Scott Thompson
Port Townsend,WA

"In a perfect world we'd all sing in tune
But this is reality so give me some room"
-Billy Bragg

[QUOTE=Brock Poling]
Are you sure the run out is not from your drill press?
[/QUOTE]

Nope, Drill press runnout is about .005

I'm going to talk to Ken today.

_________________
Scott Thompson
Port Townsend,WA

"In a perfect world we'd all sing in tune
But this is reality so give me some room"
-Billy Bragg

Well ,I figured out that two of the three rubber cylinders, the top and the bottom one, were slightly out of round. They were turned so the top one had the high spot on the opposite side than the high spot on the bottom one. This caused the abrasive sleeve to sit skewed. Rearranging the order of the three cylinders and turning the two so the high spots were on the same side solved the problem. Once they were compressed inside the sleeve they trued up.

Ken got back to me right away and offered to send me a new drum and would have called me on his dime if I had given him my phone number correctly

The one thing I'm not real thrilled with is the bottom nut on the drum. The thickness of the table doesn't give much leeway and if not very careful, as I wasn't, the nut or protruding bolt will rub on your drill press table. I think I'll head to the hardware store and see if I can find a better setup for this.

_________________
Scott Thompson
Port Townsend,WA

"In a perfect world we'd all sing in tune
But this is reality so give me some room"
-Billy Bragg

I'd be more worried about the Jacob's taper letting lose than the bearings. There has to be a bearing in there that will take a radial load. Seeing as how I've had the chuck fall off of my drill press, I'm not too worried about it. It was a pretty annoying thing since I had to figure out how to get it to stick back on, but it doesn't carry a lot of energy, so it doesn't do much damage. Of course, YMMV, and things going wrong have a way of doing more damage than they should be able to do.