3751 A place to share, learn, and grow... en-US Fri, 22 Jan 2016 00:11:10 +0000 http://bbpress.org/?v=1.0.2 q http://forums.leaflabs.com/search.php http://forums.leaflabs.com/topic.php?id=10140#post-22101 Fri, 25 Jan 2013 08:07:12 +0000 nully 22101@http://forums.leaflabs.com/ <p>I've not used an SD card before in any of my projects, so its probably an issue on the coding end (i hope) I will have to give mapleSDFat a spin.</p> <p>I agree your improvements would improve the board significantly. I believe i will have to do another revision to incorporate them (luckily everything is nice and broken out to start with so hacking an lcd to the board shouldn't be an issue).</p> <p>an on board microprocessor would probably be a bit beyond my skills at the moment, but would be pretty neat.</p> <p>Plenty of pcbs left over, if all works according to plan, i will probably see if anyone wants to try out a board, (and potentially put a kit together or something) </p> http://forums.leaflabs.com/topic.php?id=10140#post-22093 Thu, 24 Jan 2013 08:42:59 +0000 crenn 22093@http://forums.leaflabs.com/ <p>What problems are you having with the SD Card? I'm part of the support team for mapleSDFat if you're using that.</p> <p>I'm very interested in your board, although there is a couple of things where I feel things could be improved to allow additional add-ons such as a LCD character display or a TFT screen (one of my recent projects is having a 3.2" TFT screen connected to the Libmaple using only 9 pins (4 of those pins are for SPI) plus another 3 pins for the touch screen (again reusing pins for SPI)). A few of the signals are possibly not toggled as often so could be driven using a 74HC164 for example to drive the A4988 stepper drive enable and direction signals. There are other options as well, but it's something to think about. I've actually thought about making a 3D printer board set up around the STM32 (possibly the STM32F3s).</p> <p>I'm guessing you have a few PCBs left over from your seeedstudio order, would you be looking at selling them later? Certainly feel free to keep us up to date with your progress! </p> http://forums.leaflabs.com/topic.php?id=10140#post-22092 Thu, 24 Jan 2013 05:24:49 +0000 nully 22092@http://forums.leaflabs.com/ <p>Ok a bit more detail,</p> <p>So this board is my second attempt at a semi complex project.<br /> You can find its repository <a href="https://github.com/simonantonio/Ithika">here</a> </p> <p>An image of the board is <a href="https://github.com/simonantonio/Ithika/blob/master/pcb.png">here</a> and the crude schematic is <a href="https://github.com/simonantonio/Ithika/raw/master/Schematic-Rough.pdf">here</a></p> <p>Its supports 4 axis (x,y,z,e) using the <a href="http://www.pololu.com/catalog/product/1182">A4988 Stepper Motor Driver Carrier</a> (or step stick or similar)<br /> I'm a fan of things being as modular as possible, so these sit on headers just like the maple mini. </p> <p>There is also 4 end stop headers (x,y,z,emergency) which should be tied to external interrupts. and 3 thermistor sensor headers.</p> <p>I've gone for a more robust method of wiring steppers and other power hungry peripherals (heated bed and hot end) using screw blocks. (makes life so much nicer than crappy molex connectors) </p> <p>The board itself is roughly 100mm x 100mm but could very easily be shrunk, (I got seeed to manufacture it so its cheap as chips at that size as well) </p> <p>The heated bed has its on separate power rails, (probably didn't need these and i am just using a bridge to drive this off of my 12v in)</p> <p>The heated bed and hotend are driven by a IRLB8721PBF-ND which should be a logic level mosfet capable of easily switching the high amp loads. (it was a suggested replacement for the now retired mosfets on the RFP30N06LE) </p> <p>There is also two more slots for Fans or another hot end heater, and an SD card socket (which i'm having some issues getting to work)</p> <p>I think the power of the maple mini will be a great benefit to 3d printing. The atmega chips just don't have enough room or speed for me to be totally content using them. </p> http://forums.leaflabs.com/topic.php?id=10140#post-22091 Thu, 24 Jan 2013 03:35:25 +0000 nully 22091@http://forums.leaflabs.com/ <p>Having a few issue with hosting lately. I'll put the schematics and brd files up on github later this evening. </p> <p>Its hopefully going to be a drop in replacement for a typical RAMPs or sanguino reprap printer board. </p> http://forums.leaflabs.com/topic.php?id=10140#post-22081 Wed, 23 Jan 2013 06:26:03 +0000 crenn 22081@http://forums.leaflabs.com/ <p>Looks good so far, do you have any more information? I'm actually half working on building a 3D printer so I'm curious to if you have PCBs available or schematics at least. Tried going to your website, but sadly it didn't work. </p> http://forums.leaflabs.com/topic.php?id=10140#post-22069 Tue, 22 Jan 2013 06:29:45 +0000 nully 22069@http://forums.leaflabs.com/ <p>Hey all,</p> <p>Thought i would show off a little project i have been working on. A maple mini powered 3d printer board.</p> <p>The firmware is still in the works but hey, i got it playing the imperial march! progress.</p> <p><a href="http://www.youtube.com/watch?v=a3h1cHDqJuo">Video!</a> </p>