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View Full Version : Low tech use of my Shopbot



Chuck Keysor
11-21-2015, 11:32 PM
Hello Shopbot Friends:

Maybe this an old idea.... maybe it is a dumb idea, but here is what seems like a different way to use your Bot as a semi-computer controlled router...

I was asked to make 32 carved rectangles for a Victorian house. These panels are about 9" x 9", and are made of PVC. They are to be mounted in a "lattice" (pictured) that goes up at the peak of the front of a big Victorian house.

Someone else made the "lattice", and when the lattice was brought to my shop so I could fit in my carved rectangles into the lattice, I found the lattice had been constructed with badly fitted "half lap" joints. The exposed surface of the lattice should have been flat and smooth. But where the lattice boards over-lapped, they were not flush. The mis-match was between 1/16th and 1/8th of an inch.

I thought, gee, there is excess thickness in the lattice, is there some way I could lay my lattice on the bed of my Bot, and use my 2 1/2" Amana planing bit to flatten the entire surface of the lattice?

I thought of several approaches to use the Bot to flatten this lattice, but they all seemed like too much work. I just wanted to do something simple, without any bother......

Then, either I had a brilliant stroke, or my brain broke :confused:. I unplugged the two x motors and the one y motor, set the Z height via the SB3 interface, and then manually guided the spinning flattening bit over the badly fitted half-lap joints to shave down only the areas that needed it. So I used the Bot as a giant hand-held router, where only the Z-height was computer controlled.

It actually worked pretty well, and as dumb as it may sound, I felt pleased for having thought outside of the box.

Well, for what it is worth, that is my backwards technological step with my Bot. Chuck

Justin G
11-21-2015, 11:55 PM
Ha! Nice work! CNC- Chuck Numerical Controlled.

Chuck Keysor
11-22-2015, 10:19 AM
HA!!! ;) Thanks Justin, its always nice to start off the day with a clever thought! Chuck

rb99
11-22-2015, 01:16 PM
Why didn't you just use the arrow keys instead of disconnecting the motors?

GeneMpls
11-22-2015, 01:32 PM
Why didn't you just use the arrow keys instead of disconnecting the motors?

And where would the FUN be in that? I love doing unconventional things with tools. AND- low tech R US.

steve_g
11-22-2015, 02:59 PM
Another legacy thing the ShopBot does well is to put a pattern bit in the router (bearing on top), set the Z where the bearing will rub on a pattern, and manually push a project with pattern around and past the bit… saves having to redraw or digitize a project when you only need one or two!
SG

Chuck Keysor
11-22-2015, 03:13 PM
It was also interesting as I pushed the spindle around, that I had feel for the forces required to move the spindle, and could interactively experience how the move speeds affected my chip sizes. It helped me feel like I had somehow "become one" with my Bot....... Chuck

chiloquinruss
11-23-2015, 09:48 AM
I had somehow "become one" with my Bot

Ahh ZEN Botting! I love it, I don't get that feeling unless I'm working with paint or epoxy, well done grasshopper! :D Russ

Mayo
11-29-2015, 03:59 AM
I hope you didn't have to buy the PVC for those 9x9 pieces Chuck-
my back yard has more scraps than I can deal with!
If you need some just let me know...
The only drawback is they are not already square, but they are free.

coryatjohn
12-04-2015, 09:53 PM
I don't think that would work with a PRS, would it? Sounds good though. Turns the SB into an upside down router table. I can see how that might be useful for a large item that wouldn't maneuver well on a router table.