Peter_s Wrote: ------------------------------------------------------- > Again, 7mm size? > If I had the skill to fight with Eagle or whatever > you use to design thisboard I would give it a try > before asking others. Source files for PCB design are in PCB [1] format. [1]by xoan - Next Wave Electronics Working Group
Peter_s Wrote: ------------------------------------------------------- > xoan Wrote: > > > There is no way to made the trace you show > > whithout run into a DRC violation. > > Hi Xoan. > What about shifting the chip upward a little? This > will help smoothing some traces too. > You may consider moving the capacitors too. The problem is the trace passing betweeby xoan - Next Wave Electronics Working Group
Peter_s Wrote: ------------------------------------------------------- > 1. Please reroute the traces underneath the > SMD-chip. Since we do not have soldermasks you may > run in to shortage after soldering the chip. There is no way to made the trace you show whithout run into a DRC violation.by xoan - Next Wave Electronics Working Group
Step by step [1], both command line (for Linux and Windows) and IDE flavour [1]by xoan - Next Wave Electronics Working Group
You are right In fact, I don't know why I didn't ask this issue in my first message, 'cause it was one of my doubts about GND paths: temp circuit is connected to AGND, and in the schematics [1] I had to make this as a separate GND (AGND:1) to avoid errors, and do not expose the GND pin in the ExtensionBoard. I don't know if this is also the right way to do it, but I'll fix it with your advice.by xoan - Next Wave Electronics Working Group
As Traumflug said, you must use this adapter to connecto to Gen7 1.4. Instructions are in the Gen7 1.4.1 page in RepRap Wikiby xoan - Next Wave Electronics Working Group
In Gen7 1.4 the 5V pin in serial connector is not connected to any trace, so I believe that there is no problem if USB-TTL adapter is 3.3V or 5V. Am I wrong? BTW, you can buy the MCP2200 chip directly from Microchip. Or even request a sample for your projectby xoan - Next Wave Electronics Working Group
QuoteTraumflug Looks good! I guess the motor header is a bit too close to to the Pololu (you need space to allow the friction ramp to work), but that's easily solvable. I've put a link into Gen7's wiki page. Thanks I've made a check and there is enough separation between them, but any way, it's now like in the Gen7 board. I've also updated the screw terminal footprint to indicate the connectiby xoan - Next Wave Electronics Working Group
QuoteTraumflug The current situation is, there's nothing stopping one from operating a Gen7 with 24V for the motors and/or the heaters, except these indicator LEDs. For 12V, they need a pre-resistor 500 to 1000 ohms, for 24V at least 1500 ohms. I've no idea, but RAMPS, Megatronics, Azteeg and some other electronics have 1800 ohms resistors for MOSFETs LEDs and usually are operated by 12V in mostby xoan - Next Wave Electronics Working Group
Quotescuba Is there sufficient place to mount a heatsink onto your mosfet? Depends on the mosfet heatsink type and the way you mount it, but the point is that in the extruder mosfet there is no need of heatsink as well as in the heatbed. IRLB8743 is nice. Sorry, but you layout is very messy to me, there are a lot of traces and vias BTW, is your ExtensionBoard double side, right? I believe thaby xoan - Next Wave Electronics Working Group
Hi, I've made a simple remix of SevenSwitch with some elements in the main board, and this is the resulting ExtensionBoard 2E: Schematic and PCB files are also in the Gen7Board-AVR-S branch of my Gen7 fork. It's compatible (in size) with 1.4 and above, and also with Hostless ExtensionBoard from peter6960 (no shared pins) Important. It's not tested in any way Pin assigment (Teacup)by xoan - Next Wave Electronics Working Group
epicepee Wrote: ------------------------------------------------------- > 55 euro is fine. Where can I get that? > If it's RepRap DIY, I can't use that at the > moment but I will be able to. You can get all components, connectors and the board itself directly from (the Gen7 author's website).by xoan - Controllers
Depends on your heatbed resistance, usually 1.2 Ohm, you need at least 10A in the 12V output of your PSU: A = V/R = 12/1.2 = 10A only for the heatbed. Hotend and motors also need to be supplied with this same amperage, so regarding your stepper calibration (200mA per motor) and your hotend resistor (5.6 to 6.8Ohm, so 1.7 to 2A), you need 3A plus the 10A for the heatbed. There are maybe anotheby xoan - Next Wave Electronics Working Group
Quotepeter6960 Yes... I ticked Enable RX/tax LEDs Untucked enable CTS/RTS - with it ticked auto reset did not work. Circuit spot on. Works out of the box... I've been trying to using the 1.5 board with Pronterface, but the only way to do the connection is by enabling CTS/RTS. With this option unchecked I'm be able to connect using gtkterm (or another similar serial terminal), but not Pronterfaby xoan - Next Wave Electronics Working Group
Quotepeter6960 - ATX24 and 4 ways on different sides of board. So no matter how you try the thicker PSU cables has to ho over or under the PCB or other wires. If someone finds away to put all power circuitry to one side, wiring would be a dream Sure, but I believe a lot of rework would be required in order to achieve that. In the smaller PCB I've been doing I think that may be impossible. Quoteby xoan - Next Wave Electronics Working Group
QuoteRezer If the USB is unplugged after that and plugged back in you have to power cycle the board, wait for the caps to discharge, and plug it back in. I'm assuming this is a side effect of powering the MCP2200 from the board instead of the usb port and not shoddy soldering on my part, but I'm less than 100% positive on that one. Is this expected behavior? I just finished soldering a Gen7 v1.5by xoan - Next Wave Electronics Working Group
Your board is etched mirrored (see the «RepRap Gen7 v1.4.1» text in the copper side) I believe there is no solution but etching again. If you use the «release documents», you need to print the bottom mirrored in order to do the right toner transfering, or export you own PS from the .pcb file and uncheck the «auto-mirror» option in the export dialog.by xoan - Next Wave Electronics Working Group
QuoteTraumflug There has to be a distinction between the GND track going to the MOSFETs and the one going to the thermistor connectors. As they're currently drawn they likely connect to each other when using Visolate. Extending one of the nearby tracks to fill some of the room between both ends of the huge GND track should help. Yeah, I saw while looking into generated voronoi toolpath. I undersby xoan - Next Wave Electronics Working Group
Hi again, I believe this is my last message (in the main developer thread) related to refactoring Gen7Board-AVR layout to make it down to 120x80 mm PCB size. I've working on USB area, and... VOILA! Original ExtensionBoard footprint is now back into the board, so except for the extruder and *-axis connectors, all the rest is fully compatible --in theory I've made a fork of your GitHub reposiby xoan - Next Wave Electronics Working Group
QuoteTraumflug Looks excellent, Xoan! [...] Congratulations! Thanks, but most of this is entirely your work, not mine (I've only made some PCB layout tweaks QuoteTraumflug > 2. Endstop connector pins are mirrored, so signal is now 5V and 5V is now signal. Could be solved by turning them 180° ? Doesn't matter much if you do the cabling yourself, though. Yeah, in fact this can be changedby xoan - Next Wave Electronics Working Group
QuoteTraumflug Sure you can make that extension board footprint smaller. You'll loose compatibility with standard sized ones, of course. You can even drop it entirely, it's not essential. Extension board is pretty useful, so it's mandatory, and I can always make an extension board to acts as a compatibility layer to the standard extension boards So, that's the full-featured Gen7 v1.5 in 115x79by xoan - Next Wave Electronics Working Group
Sorry again for the noise Main target was a 120x80 mm max board size, but 80 mm is hard to achieve due the Extension Board socket size, so I've been thinking in to reduce it to 14x11 pin, and to move ICSP to a separate Extension Board. Current size is 115x87 mm.by xoan - Next Wave Electronics Working Group
Hi, I'm not sure if this is the correct thread to post this, so sorry if it's not. I'm doing some work on to learning gEDA, and my first attempt is to play with the current Gen7Board layout. This is a work-in-progress, so before to continue, I want to know if this changes are correct. I changed some paths in the stepper drivers header to be able to place them without separation, and to alloby xoan - Next Wave Electronics Working Group
Sorry: .22µF But as I said, it was my mistakeby xoan - Controllers
I had a similar problem, but it was my fault, because the oscillator capacitors that I'd soldered was 22µF instead of 22pF. I think there are a lot of causes for an Signature Error, but I don't know more than the one I had. Sorry.by xoan - Controllers
Hi, I'm trying to figure out what is the best approach to start with an Extension Board to add dual extruder to Gen7. I think there are several choices, like a) using SevenSwitch as heater and to implement stepper socket and themp sensor in the extension board; b) implement all heater, stepper and themp sensor in the same board, or c) add themp sensor to SevenSwitch and using extension board oby xoan - Next Wave Electronics Working Group
Pictures are a huge benefit in your documentation, but for this point also are a huge disadvantage. I'm now taking a look to gEDA, and it's an amazing program. Maybe it's a long term achievement, but would be interesting to implement an export utility for soldering steps, like the realistic photo-mode export on PCB, but taking some parameters like soldered components, connectors, and so on, usinby xoan - General
Hi again, After some research through net, I found this issue related to 100µH coil, so I just remove it and wire the pads (it's Sunday and I'm not own a 10µH coil), and voila! can connect. I've reinstalled Teacup, my first choice, and I can move motors and other stuff. I also can start heaters, but I don't have any resistor connected to them, and LEDs are a bit light when temp is set to 0 andby xoan - Next Wave Electronics Working Group
Well, some kind of advance. I install Marlin, and this is what I get: start echo: Brown out Reset Marlin 1.0.0 echo: Last Updated: Jan 27 2013 13:12:13 | Author: (none, default config) Compiled: Jan 27 2013 echo: Free Memory: 1454 PlannerBufferBytes: 1232 Now I need to figure out what component or path could be the cause of this brownout resetby xoan - Next Wave Electronics Working Group
Traumflug Wrote: ------------------------------------------------------- > 3 seconds is about the time the bootloader waits > for incoming connections after a reset. So your > board apparently resets immediately after firmware > startup. Yeah, it is my conclusion too. But at this point, I don't know what or where can I check to find the reason of this constantly reset. The SetupTestby xoan - Next Wave Electronics Working Group