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Video of idea

- Inverted mount
- Not too sure about hinge forces. Using 8mm pin might not be enough. 1/4" aluminium plate might also be too weak.
- Trying to leave room around the pulley for...

Thanks for all the great info!

After reading that a smaller machine like my X2 only needs about 600-800lbs of force, it makes the pneumatic solution a little easier for me.

I'm thinking of...

I've been mulling over how to pull off a power draw bar. Looking at Hoss's very cool air-cylinder + lever design, and Tormach's triple pancake cylinder stack, I couldn't help but feel both options...

You'd be surprised. When I built my monster gantry CNC (4' x 3' all aluminum), I used my X2 for everything. What I did was installed a hook in the ceiling of the garage and used a come-along to...

I recently got bitten by the CNC bug again, having built a rather large all-aluminium gantry style CNC a few years ago, and enjoying that process. I've come to realize the limits of my oversized...

I was rooting around for BLDC controllers, and stumbled across this site. Would anyone know if it would be suitable for hobby motors?

Electric Vehicles Controller - Motorized Bike Parts

I'm having similar ideas.. some of those hobby motors are intense

HobbyKing R/C Hobby Store : T5692 Turnigy Pro Comp Brushless Inrunner Motor 1000kv

6000watts?!? :eek:

This might be old news to you guys, but I was completely blown away.

Worth the repost if even one person hasn't seen it.

http://www.kirkhammotorsports.com/book_aoe/

Just thought I'd share my sources for raw materials in Ottawa.

Plastics
Laird Plastics (they're everywhere!)
700 Industrial Av #6 & 7
Ottawa, ON K1G 0Y9
T: 877-228-2296
L: 613-247-9518
F:...

There is a "Bridgeport I" up for auction from the Canadian Crown Assets dept. It's located in Burlington, ON. I'd pick it up myself, except it's too big, too far away, and probably too expensive....

This is the hangup for a lot of people.

Round linear shafts are relatively cheap, but can't go very far without middle support. Combine that with the home-brew roller blade bearing setups, and...

I had similar frustrations with McMaster.

Fortunately I found out about Busy Bee Tools which happens to be less than 2 blocks from my work. :)

They cater more towards wood working, but also...

Is there anything in EMC2 to do automatic tool length detection?

I was thinking of putting a contact on the table at home position, so the machine could automatically determine the tool's...

I started with a P3-800, but when I upgraded to PICStep controllers doing micro-stepping, I found the computer (RTLinux) couldn't keep up.

I ended up buying a P4-3GHz which now runs my machine at...

I disconnected the brown wire that was coming out on the primary side, and that did the trick. I think it might have just been directly connected to the brown wires on the secondaries. If I start...

I have a power supply (see attachments). I was attempting to use the two red wires to create my 52VDC, but I found I kept tripping the breaker. Turns out the common on the red coil (brown) is the...

I've had hit-or-miss results with toner transfer, until I started using a power drill with an abrasive pad for roughing up the board before transferring. It made a huge difference to my success...

I know it's cheap, but you could layout three PICStep boards and a break out board onto one peice of copper. Still need the ribbon cables to connect each section. Personally, I think modular is...

I found that hi-tech pic-c was the best freeware C compiler I could find. The free version has limitations in how large the chip can be (16F627 [1K], but not 628 [2K])

It was the only compiler I...

I lucked out and found some 20Mhz parallel cut xtals at Computer Recyclers here in Ottawa. 2/$3 so I scooped most of them. Digi-key had ceramic resonators .... $5 for 10 ... and then $20 for...

Just a final follow up. I tried using some different crystals I found at the local Computer Recyclers (2 for $3 yay!), and things started working perfectly. I must have been using some non-parallel...

I've been working on my PICStep clone, and am having lots of issues with oscillation. I'm using 20Mhz crystals with a couple 27pf caps. I found that on one I needed a 1M resistor in series with...

I used to until my laptop hard drive decided to take a dirt nap yesterday. (chair)

I'll try to put one together this week. A lot of them you can find off the EAS website (see the first post in...

New release with some cosmetic board changes. This ensures that all traces are separated by at least 1mm (for easier milling with a wider bit).

Added a few more fill areas to save on...

It's basically looking for an Internet connection... probably a little route in the CAD program to collect statistics, or validate authorization.

You can add the IP protocol (which comes with both...

Here's a working revision. I strongly recommend not building any previous revision. The 20K pot in parrallel with the 6.6K resistor is dangerous. I've changed them to be in series which should...

I lucked out and found a nice linear PSU from the local computer surplus place. It came in 3 modules. A) power connector; fuse; switch and filter B) transformer, and C) 3 rectifiers and 5 large...

I found a pretty good source of heat sinks from old computer power supplies. There are usually a couple per PSU, and are fairly large (not particularly thick mind you).

Almost certainly need a...

Check out pminmo.com ... there's many types including a microstep driver that uses regular transistors. Theoritcally, you can replace them with transistors large enough to handle 6.5a

ALSO, A...

Moved the input signal connector to allow more space near the board mount holes. Also allows for keyed connectors.

I've finally gotten a board made and all the parts, so we'll know real soon if...