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Also, if you run into that situation where the nut spins in the trap take a jewelers screwdriver and wedge it between the nut and the wall, then slowly back the screw out. That trick has saved me more time than I care to recount.

Do you have a link for the steppers?

Tom, what size motors are you going to use, and what are you going to drive them with? Grbl?

Yep. At least that's the plan. Anything in red in the model is 3D printed, but that may change, especially those nut mounts... And it's still in the roughing out stage. I have tweaks that I want to include. Improbable Construct over on the shapeoko forums has done some fantastic mods to his...

And here's the 64 bit version https://docs.google.com/file/d/0B6yPgtXXa9tXaFEtclVzZzh6NEk/edit?usp=sharing

I haven't bought any openrail yet. :( Just some other stuff. I've got to get this shapeoko up and get some time with it under my belt before I move on to a bigger openrail machine. This is a first attempt at a more modular shapeoko able to support larger rails on all axes. Still need to...

Very cool. I have some concerns about the V-slot though, like debris accumulating on the channel and then causing the wheels to jump. Probably won't be an issue with a proper vacuum shoe/dust collection. On the plus side it's pretty cheap compared to makerslide, and comes in a number of...

It's OK. For some reason I thought it would be larger. Just a little bit bigger would be great. I went for the dual X-axis and the second Y-motor as well. I'm actually working on an upgraded machine in 123D that uses much larger aluminum members and openrail with steel wheels. Something...

Or... you can now download the 32-bit version of 123D from my Google Drive. :) https://docs.google.com/file/d/0B6yPgtXXa9tXSUNJb2RRcVp1c3c/edit?usp=sharing I'll try to find the 64 bit version tonight. And yeah, trying to get those nuts in can be a pain. But there is a technique. Grab some...

Mark, Inventor Fusion is still available for download. http://labs.autodesk.com/technologies/fusion It will open 123D files just fine. Also, how do you like that Helios bed? Matt

Ralph, the best way is to think in relative distances. You want to position a cylinder relative to a cube. First create the cylinder at the corner of the cube. Then select the cylinder on the component tree to the left and select "Move/Rotate/Scale" and use the compass to move the cylinder...

Greetings everyone! I was away on vacation, and I got to wondering - how many people are actually using the RFM12B radio with their HM4? I could certainly see where it could be useful, but is it practical in the current setup? I could see it in a wireless probe/fan setup for sure.

Looking good! Pretty decent looking part for only having the machine about a week. Congrats! Also, netfabb has a cloud service that I use on a regular basis to fix .stl's. http://www.netfabb.com/cloud/ Their private edition of their pro software looks interesting...

Yeah, those nut traps are problematic. If you don't get the bridging just right then they tens to sag, which is a real pain in the *** when trying to embed the nut in the trap. Did you insert a key or two into the new design to help with alignment issues?

I've been away for a bit. Key west was great - if anyone is going and needs a reccommendation I can point you in yhe right direction. But back to business. Pictures! We love pics and videos of these things doing their thing. How correct is your case dimensionaly? How accurate were you able...

Holy moly! 10mm leadscrews? Thats huge. And M10 smooth rods? 12mm or 16mm would be awesome... Did you design your own X ends? Also, why so thin on the first layer? I go 200% for 1st and manually adjust the layer height to get a nice "squashed" first layer for better adhesion. What are...

Yeah, change that upper limit to 245 for a J-head. Don't go above 245 for a prolonged period of it will literally melt. Also make sure that thermistor is really in there and well secured. If it falls out you will have a melted J-head for sure. :( I don't know if thermal grease is rated for...

Now that explains a lot. That altered code came from the Marlin Reprap firmware: #define PID_dT ((16.0 * 8.0)/(F_CPU / 64.0 / 256.0)) //sampling period of the temperature routine It runs at 7.62 Hz, and controls my heated bed, which is run off of an SSR. I just figured 10Hz sounded like a...

Other useful links: http://calculator.josefprusa.cz/ http://nathan7.eu/stuff/RepRapCalculator/RepRapCalculator.html#MotorStuffPrecise http://reprap.org/wiki/Triffid_Hunter%27s_Calibration_Guide https://github.com/alexrj/Slic3r/wiki/Calibration Also, you should auto-tune your hotend for...

Bryan, Can you insert some code to allow for user-definable high and low frequency PWM? Something like: define PID_dT (uDefClk/F_CPU) where if uDefClk is defined low the value is 1600000 (10Hz) or high the value is 32000 (500Hz) This would make using the HM for sous-vide or electric smokers...