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ok, im an idiot, when the software asks you to turn off/on drive power, I was toggling HV whilst leaving 12v connected. Looks like you don't need HV on, and its 12v you should toggle. Doing that it...

forgot to mention, also tried ferrite cores on ftdi cable. No motor has been connected during these tests.

Hi,

I am having massive problems getting GDTool to work. Most of the time it has a connection error opening the drive. If the drive opens, and I download the settings from it, I get garbage values...

Hi,

I have a solidworks assembly with a moving stage and am trying to model a cable between the moving and fixed parts. I have tried creating a part with sketches constrained to both moving and...

Its for a custom human interface device for a computer. The static load of 100N is to provide some overload protection if its dropped/lent on, the truck will be moved by finger movements, so the...

Hi,

Does anyone know where I can get very low static friction linear rail trucks? I don't need a lot of load capacity (100N or so), but the application is very sensitive to static friction....

No, the idea isn't just to bolt a water block to the outside of a motor designed for air cooling. The idea is to design with an appropriate motor to begin with! The best cooling approach is to have...

I actually have a few pcb router spindles that use liquid cooling jackets to keep cool. This is a really good approach, but works because the motors (frameless synchronous type) and enclosure have...

My suggestion is to avoid making encoders if at all possible, have done so before and its not worth the effort involved.

Avago technologies have two things that spring to mind. They do stick on...

stewi: it might be worth doing a new thread, that way you can use the poll feature on the forum, and more people will find it. I would be interested in such a site, as a user and potentially a...

stewi: they got their investment due to having a strong brand, market awareness and a popular product. I highly doubt Foundry Group are interested in the technology per se. In a sense their web...

just to put another thought out there, but look at companies like makerbot, they produce a product that is inferior in every way to the commercial systems, but with open source and a good price point...

do you mind posting details of the chip you found?

There is another type of sensor that might work out well for diy construction, that is magnetostrictive sensing, which involves sending a current...

actually having just tried it, when you make the column narrow it does show a horizontal scroll bar at the bottom that lets you move the tab contents horizontally, are you seeing this? (it would be...

yeah that bug has been around for ages, there is a drag decorator on the tab group, and if you resize it the problem should go away. I assume that there should be a horizontal scrollbar showing up...

i might put it this way "if you are only ever going to want to use the chips the pickit2 supports now, then go for it, else get pk3 (which still receives new firmware as parts come out)"

I have a link you might find interesting, it details how to make interlocked parts, and might be of interest for the cover part (as it could remove the two rivets). Shapeways | designing mechanical...

I would prefer step or stl, as I'm running solidworks and those two are easy for me to import.

Hi Stewi,

That looks great, I will have to order myself a set of parts to play with :)

Do you mind sharing the original cad file for the assembly on here? The shapeways part viewer is a little...

im going to disagree with everyone, and suggest that you buy a pickit 3 debug express kit. The pickits are cheap usb programmers that support debugging, which is a better choice over bootloader based...

both are pretty good. Pickit 3 supports a slightly wider range of parts, pickit 2 has some nice addons like uart etc, that didn't make it into the pk3 version. I used to have a pk2, but it broke, so...

shapeways is about 1.35$/cubic cm of material in part for their economy plastic (SLA process). That means that the wheel you are building would be a couple of dollars, and the surface finish is...

Stewi: Have you considered having these made with rapid prototyping? Places like shapeways.com are really pretty cheap now, and it would allow people without machine shops to order one-offs. It would...

awerby: thanks for the link, I didn't know about them. From looking through the mailing list these two pop out as almost exactly what I was planning to build.

3 D L P rint
ChemShapes
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The only places I know of where this technique is discussed is the blog listed on the youtube video I posted, but it appears to be very simple. I found a source for the chemicals in small quantities,...

You can do SLA type rapid prototyping with conventional DLP projectors to set the resin. Here is a youtube video of someones design:

3D Printer - High Resolution - Homemade - DIY - YouTube

The...

shyfx: if you are planning on writing an open source ethercat slave implementation, that would be a very useful tool for a lot of projects out there.

Eclipze: cool machine, nice to see things are coming together. Any chance you could share where you found the rotary pneumatic coupler you are using above the stepper shaft in your design? have been...

The reason i suggested the router was so that you would be able to test the concept without spending a lot of money. There are many ways of solving this problem, and a multi-axis robot may sound like...

Do you have the workspace on your cnc router to just make a custom spray-head and use that for positioning?