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This weekend we upgraded our old Shopbot board to the new V4G board with a v204 controller.

In my initial testing I noticed that when I tried to jog on the X axis sometimes the gantry would torque...

We recently did a V4G upgrade on our older Shopbot, so I'm finally able to use the updated software!

I really like the improved preview functionality, and I'd like to get my students using it...

Recently we found some cast iron bench ends at a tag sale, so I've been making an octopus bench out of them.

This is my first engraving project so I'm not really sure what I'm doing.
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They need to sit on them and use them as a step... Otherwise you're right, we'd just paint something flat to look like a barrel.

I run a High School theatrical scene shop and I need to make some barrels. They don't have to hold liquid, they just need to look barrel-ish.

My first dash at an attempt was terrible. The lesson...

Well, I'm not an expert on these matters, but it brings to mind a few questions:

Does changing the ramping speed have any noticeable affect on tool movement?

Is it possible that the ramping...

David, if you rotate the raster direction by 90 degrees do you get the same shaking?

Eric, Yeah the video is sped way up... I didn't want to bore people by making them watch two hours of...

Hmm... I'm afraid I don't have any magic to share.

I'm using the default values out of the 48x96PRT config file that ships with the Shopbot software.

I was running the bot flat out during...

I'm in between shows right now, but I just had some new gear show up. A collet from Precision Bits and some new round-nose bits.

I'm not the kind of person that can have new toys and then wait...

Hey everyone,

I have an Onsrud 52-570 foam bit. I'm not really sure the best way to mount it in my PC Router.

The bit has a 5/16" diameter.

My thinking is that I should find some kind...

LOL. Okay, that does it. This is officially the best thread ever.

I had a little down time last night while waiting for a show to come down and decided to play with some vector art and a v-bit

After a little experimenting, here's what I came up with.

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On the other hand, I certainly wouldn't have hit a hold-down screw if I was using vacuum hold down


The epilogue: The finished part was completely salvageable and I finished putting it...

It's a home-made dust foot that I made on the bot, then I stapled on a strip-brush from McMaster.

True that. I don't have these lightning fast reflexes for nothin!

This is the kind of mistake that I make when I start using the bot after taking a few months off. (The other mistake I make is...

So I've nicked hold-down screws before. Usually the bit gets dinged up and a chunk disappears from the screw.

This is a new one for me.


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The screw got sucked up into flute of...

About a week before the New Years a friend of mine called to say: "Wouldn't it be fun to have our own ball drop on New Years Eve?"

I agreed that it would be fun and so the planning began.

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Thanks to everyone who gave feedback in this thread. After breaking three Onsrud bits in a row I couldn't take it anymore. I bough a new collet and a couple of Bosch bits and haven't had a problem...

I've been cutting pink foam with a 1/4" ballnose on a PC router at 6IPS at between 22K and 10K. For the life of me I don't see a difference in the quality as I change the router speed.

The only...

Unfortunately, since the bot I use is at the local high school, I would have to unload all the scrap onto... myself :-/

I rather doubt that would solve my problem. Hehe.

One of the things...

So most of what I use our bot for is cutting difficult shapes out of plywood. In so doing I generate a lot of these:


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I now have a ridiculously huge pile of scrap 3/4" ply that has...

Hehe that stuff will indeed harden foam... though to be honest it scares the pants off me. It seems to be a aerosol binary coating... like spray-on Bondo... the very thought makes me want to put on...

Thanks for the feedback everyone!

I didn't do the circular cut, but I did try to "wiggle" the x-car with the controller on. The x-car wouldn't budge. So that's a good thing. I guess that means...

Spoke too soon.

Last night my 3rd new bit in a row snapped in half on me. I've now ordered a two new collets and three more 1/4" end mills (from a different mfg).

Last night I was cutting...

Finish will be pretty simple, we'll just sand, prime and paint!

They're on the concave side of the bar, so they're somewhat protected, but we'll have to devise a system to keep them ding-free. ...