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Re: Why is everyone using arduinos to interpret gcode? - 14 years ago

I think the point is not problems with bandwith between storage medium and host, more likely the problems would be because of latency between the host and arduino over USB. USB (at least <=2) is not very well suited for low/guaranteed latency transfers. This is (partially) why many prefer firewire for pro/prosumer audio "cards". I don't have any direct insights about the communication in t

by anwe79 - Controllers

Re: 24 v supply, 2.5 A motors and Stepsticks = trouble? - 14 years ago

Thank you for the clarification, then i know what steps i need to take to correct the problem. I'll start by replacing the sense resistors on the extruder driver to 0,1 ohm, if that's not enough i'll have to look for another motor for the extruder. I already have heatsinks on the drivers, but i'll see if i can't add adittional cooling on the extruder board, perhaps a tiny heatsink on the under

by anwe79 - Controllers

24 v supply, 2.5 A motors and Stepsticks = trouble? - 14 years ago

Hi! I'm just finishing my printer and i have what i gather is a somewhat unusual combination of hardware. Basically, i'm running a RAMPS 1.4 with Stepsticks, a 24 V power supply and Wantai 42BYGHW811 2.5 A 1.25 ohm stepper motors. The extruder is a Greg's hinged accesible with a J-head IVB 0.5 mm hot end. I'm having a bit of trouble with my extruder (and occasionally Z) motor stalling. I get wha

by anwe79 - Controllers

Re: Raspberry Pi RepRap and python - 14 years ago

No not yet, I've been redoing some work on my printer's mechanics so i haven't really had time to mess with the software. I think i'll have to postpone the USBIP stuff until i get my printer printing reliably. An unrelated note: I have found one small annoyance with running directly off the Pi; Pronterface get's quite laggy and unresponsive during print. It may not be a real issue if you are pr

by anwe79 - Developers

Re: Raspberry Pi RepRap and python - 14 years ago

Be aware that the current state of slic3r (which you'll get building from git) seems to have slightly illogical configuration file handling. It seems to save config files in four different folders, but with nearly identical contents. I couldn't figure out how this was supposed to work, so I hand edited the file i call from pronterface (otherwise it would try to wait for my nonexistent bed to heat

by anwe79 - Developers

Re: Raspberry Pi RepRap and python - 14 years ago

Yes you should be ok with the standard raspbian repository. The Slic3r install will auto install a lot of Perl modules from CPAN. (I'm actually not a big fan of this aproach in general, it makes the system messier to admin since you can't track the modules via debian packages, but i was eager to print, lazy and tired, so what the heck For those with admin OCD try dh-make-perl) One dependency i

by anwe79 - Developers

Re: Raspberry Pi RepRap and python - 14 years ago

I at least managed to build Slic3r, but i haven't got time to test it right now, i'll update later. There were some dependency problems, make sure you have gcc-4.7, g++-4.7 and pkg-config installed, as well as the other packages mentioned for "ubuntu users" at the bottom of the Slic3r homepage. Maybe extutils-cbuilder-perl too.There might have been one or two more, keep an eye on the build log to

by anwe79 - Developers

Re: Raspberry Pi RepRap and python - 14 years ago

15-30 seconds seems like a lot. I do get delays, but most of the time only about a second or so. Check that you don't have packet loss on the network link to the Pi, that might cause those issues. I tried running skeinforge a few times, but since I'm a reprap noob, the config seemed quite daunting, and i couldn't get it extruding properly. It's also painfully slow slicing, so I'm now installing

by anwe79 - Developers

Re: Raspberry Pi RepRap and python - 14 years ago

One more tidbit regarding the Pi is I've found it hanging when uploading firmware to the controller board via the Arduino IDE. When I've tried this, Iv'e been powering the Pi/RAMPS/USB Hub with a 24V/5V 2010 mA car plug adapter running off my 24V supply. I suspect that may be the cause, it's been rock solid when runing otherwise, but the Pi is very sensitive when it comes to power source. Maybe

by anwe79 - Developers

Re: Raspberry Pi RepRap and python - 14 years ago

A web interface might be a little overkill, but it's a cool idea though. The benefits i can think of are that it's probably more lightweight than an X-tunnel/VNC and it would be quite nice for remote control over the internet. This got me thinking which of VNC or X is better for system load? I have a hunch X is, since it doesn't have to render or compress anything on the Pi. And there's no need

by anwe79 - Developers

Re: Raspberry Pi RepRap and python - 14 years ago

I've now tried connecting through wifi, and it works fine. Configuring the wifi on the Pi is the same as any other Debian config, no surprises. The exact procedure varies slightly with what stick/driver you're using, in my case (carl9170) one has to install the firmware manually. Otherwise it's just standard wpa_supplicant/iwconfig stuff, plenty of info for that on the web. Regarding RTAI and

by anwe79 - Developers

Re: Raspberry Pi RepRap and python - 14 years ago

Yes, it's probably just some subtle difference in the FTDI kernel driver between squeeze and wheezy. I was just confirming that my board does have a "standard" usb-serial chip.

by anwe79 - Developers

Re: Raspberry Pi RepRap and python - 14 years ago

Just to confirm, my usb-serial chip is an FTDI 232RL (device id 0403:6001), i think this is the same as in the official Arduino, no? Modules loaded are ftdi_sio and usbserial.

by anwe79 - Developers

Re: Raspberry Pi RepRap and python - 14 years ago

Yep, Ramps 1.4 and "Arduino" Mega 1280 is what i'm using. Come to think of it, my "Arduino" is not genuine Arduino, but one of those fully equivalent knock-offs. I would think they'd use the same USB-serial chip though, so it shouldn't matter. I'll have a look at "lsusb" when i get home this afternoon to see what chip it reports.

by anwe79 - Developers

Re: Raspberry Pi RepRap and python - 14 years ago

Just a quick update, just tried pronterface over the lan on the Pi @250k, seems to work ok, i get the same feedback from the firmware (marlin) as when connected to the desktop. This is on Raspbian (kernel uname is 3.1.9+ #138), the new image may not be identical to my install, but should be close enough. Could be that the old (non hard-float) Debian image doesn't work the same way. Haven't trie

by anwe79 - Developers

Re: Raspberry Pi RepRap and python - 14 years ago

@WDZaphod & Richrap: I'm running Debian on my desktop and just tried yesterday connecting Pronterface to my Arduino/Ramps, and it worked at 250k out of the box. It was just a quick connection test though, but it worked well, got warnings about the thermistors (which weren't connected). So your problem is probably not Debian specific, or maybe a specific combination of hardware and Debian.

by anwe79 - Developers

Re: Slic3r and J-head hotends - 14 years ago

Hi, I'm not sure if you guys have seen this, I read the thread yesterday and can't recall anyone mentioning it, apologies if so. It seems that reifsnyderb actually drills the J-heads he makes slightly undersized (0.4572mm for a nominal 0,5mm nozzle) to account for wear. This explains the "lack" of die swell at least. Pondering the Nozzle Orifice Drill Bits I just stumbled across this when I

by anwe79 - Slic3r

Re: Safe to replace 1N4004 with SY 320/8? - 14 years ago

Thank you for your answer madscifi, that's what i thought. I did a bit of googling last night and came to the same conclusion. If anything, the "bigger" diode should be more resilient if the polarities actually are reversed, since it can handle a bit more current and will fail later if the fuse doesn't blow quickly enough. As a bonus I learnt to check the protection diode(s) in case a fuse bl

by anwe79 - RAMPS Electronics

Safe to replace 1N4004 with SY 320/8? - 14 years ago

Hi, i just got my RAMPS 1.4 kit and am soldering it up now. I came to the point were the diode is put in and realized i'm missing the 1n4004 in my kit. Don't know if it was missing from the supplier, but anyway... I went through my boxes of scrap and found some SY320/8 diodes. I'd like to use these so i don't have to go shopping for a measly diode. A quick google tells me they're rated for 1040

by anwe79 - RAMPS Electronics

(UV) Laser for pcb photoresist exposure - 14 years ago

Hi, I'm new here, i just wanted to share an idea that came to me, while browing the RepRap wiki. Maybe it's not novel at all, but i ether got lots of noise or no matches at all when searching for it on the forum. So, here goes: the idea is to use a laser to define the traces on a standard photoresist-covered PCB-laminate. On way would be to use a UV-laser (with suitable wavelength) to expose a p

by anwe79 - Controllers