Hi Arthur Sounds like your opto's are backwards from mine, mine read a one when unblocked and zero when blocked. In the parameters.h file there is a value SENSORS_INVERTING that you can set to flip the sense value.by freds - RepRap Host
I wouldn't mind if they had a hobbiest cost but they have a sales pitch along the lines of try it until your are addicted and then pay full boat/price.by freds - RepRap Host
Hi Demented You know I didn't really check after 24 hours, in the first four hours the X stage only came up with a delta of three steps. This is at 2000 steps per inch over a distance of around 10 inches. The Y stage was a delta of one for about eight inchs of travel. However accuracy depends on the weakest link and that is definately my Z stage which with it's required arm to reach the centerby freds - Reprappers
How do you get a copy rhino at a reasonable cost?by freds - RepRap Host
Hi Everyone First off I would like to thank everyone who has gone before and contributed to this project! I now have my repstrap moving in all three axisby freds - Reprappers
I think we can see better and more flexible electronics and software sooner. Go with the current darwin design and give it away as your social responsiblity when your are enticed by the Mendel mechanics later.by freds - General
Arthur Wrote: ------------------------------------------------------- > freds -- I've attached a picture of how my opto's > for each axis are oriented on my Mcwire. Is yours > the same? Note placement of motors. In general, > the "mins" are on the motor side; "maxes" are > opposite side of motor. > > Arthur Hi Arthur I am not building a McWire; though I do have a movingby freds - RepRap Host
Forrest Higgs Wrote: ------------------------------------------------------- > freds Wrote: > -------------------------------------------------- > ----- > > > > In RepRap sense is refered to as a RepStrap > that > > you use to manufactor parts to build a Darwin > for > > Additive manufacturing with a plastic extruder. > > > NOT! A reprstrap is anby freds - Mechanics
I believe you are referencing what is referred to on here as a McWire to honor the guy who came up with the orginal design. In RepRap sense is refered to as a RepStrap that you use to manufactor parts to build a Darwin for Additive manufacturing with a plastic extruder. Since the McWire was designed for very light milling you can do some very light CNC work with it; though the tool chain that eby freds - Mechanics
Well thats most defiantly a research project. The link you listed does go into some detail. Since this is a new subject/technology there are not going to be a lot of primers out there. Most of the technology in this space has not been open source but part of commercial turnkey solutions. I suggest using the suggested software, studying, contribute to it before striking out on your own. I haveby freds - RepRap Host
Hi Authur I think I have made the same errors that you have; though in my repstrap it doesn't un-thread it self. Anyway you might simply have your motions or your endstop sensors backwards in that it is trying to home the axis and it is looking at the minimum end stop sensor as zips past the maximumn sensor. Since the McWire has a moving table the motion of the motor is backwards to what you wby freds - RepRap Host
That doesn't sound right, mine is driving a large ball screw X stage with another heavy Y stage on the top of it and it's warm but not painful to touch. If you have the current too high, the motor will click as the 298 IC does a thermal reset of some kind. It led me believe that I had ground loops in my setup injecting noise into the circuit, but after I turned the current down for all three axby freds - Controllers
gsker Wrote: ------------------------------------------------------- > There was no reason that that should have been so > hard to find for me. (do I feel dumb) > I just went to google and typed "burn sanguino > booloader from arduino" and came right to the > actual page. (your link is to the comments -- but > close enough!) > > > ders.html > > Wow. > >by freds - Controllers
No thats not it. The link to use a arduino to write a boot strap was at: Need to do show orginal post with the above link.by freds - Controllers
Gerry Skerbitz Wrote: ------------------------------------------------------- > > Any help would be appreciated. > (I have a working boarduino and had an arduino, so > the computer interface stuff is all working fine. > ) If you still have your arduino I think you can use it to upload the bootstrap, there was a link on here somewhere to that effect.by freds - Controllers
Samuel Wrote: ------------------------------------------------------- > What can be done to fix the auto reset > functionality? How is it supposed to work? I think it is more a matter of the Arduino software not closing and re-opening the port before a upload attempt. My terminal emulator program has a re-connect button that does this and it definately resets the Sanguino. Here's somethiby freds - Controllers
When you press the reset button the red led should flash a few times as it invokes the boot loader. If it doesn't flash you may have gotten a blank CPU that hasn't been flashed yet. Note the pinout assignments when you get to wiring it up for a darwin or repstrap are quite different from the Arduino. Also the flashing led example for the Arduino uses pin 0 on the Sanguino. See:by freds - Controllers
A couple of quick questions. 1. You measure DC across the 0.5 Ohm sense resisters? 2. Do you messure while it is moving or holding station? I ask this as I set it per the instructions of backing off till it doesn't move and then forward to started moving again. Then I listened and advanced until the steps crisp sounded rather then soft. My heat sinks and motors are cool to the touch and I caby freds - Controllers
Has the Pin mapping assignments or wiring diagram for the Sanguino been published yet? I tried adapting the arduino wiring diagram and ran into a collision since the serial port pins changed on the Sanguino when wiring up the min & max sensors.by freds - Controllers
Would love to see your mechanics when you get to them. Interesting approach for holding the electronics! I never though of mounting the pins for Sanguino on the top of the board! Though since there is now a breakout shield they need to be on the bottom. Rumors are (mentioned in the upcoming lcd controller) that there is a Motherboard sheild coming which I think is going to require some re-wirinby freds - Reprappers
I haven't found it to be too difficult so far, though I haven't gotten to the extruder yet and I am buying machined parts for that from one of the other members who is offering a kit. Electronics wise I have ordered the kits from the store and they have been fairly straight forward. There's starting to be an ecosystem for this and it will just be getting easier. I am not doing a Darwin yet butby freds - Reprappers
sid Wrote: ------------------------------------------------------- > Oh really? > Mine came with six, that's why I said so... > > 'sid Yeah, so I think the word would be if you are going the Sanguino route it's best to order the kits that you actually need, until they come up with a Sanguino bundle. If anyone wants my spare Arduino Breakout Shield v1.4 Kit in the states. Send meby freds - Controllers
sid Wrote: ------------------------------------------------------- > I guess you're wrong > the kit contains 6 not three endstops > (although he wrote three, he packed six; look at > the image and substract the arduino and usb > cable) > and the 3ft ethernet patch cable > so that's 145 exactly > > so not that bad as you think > Actually my kit only came with tby freds - Controllers
Rick Wrote: ------------------------------------------------------- > Once I finish getting the bugs out of my McWire > (fingers crossed...nearly there)I'm considering > strapping my trusty Dremel to the Z Axis and > milling the fabricated Extruder parts. > > Has anyone tried this, how successful was it and > do you have any tips on proceeding setup-wise > (trying to avoiby freds - RepRap Host
While I did follow the path you did. I have the smaller board that is plugged into the breakout board. My CPU came pre-programmed with the bootstrap loader, you press the reset switch and the red led flashes indicating it's ready to load a program via the serial port via the Arduino software. Others have indicated and it's my experence also you have to do a reset imediately before loading a sby freds - Controllers
nophead Wrote: ------------------------------------------------------- > An interesting mechanism: > > > Belt_Drive.php?nid=2337&rid=1696394 Yeah I saw that a while back and was thinking of a repstrap design based on a simple square frame for the x & y using the belt on each side with the stepper motor in the center. The stepper motor in the center could be geared down witby freds - Mechanics
Schultz Wrote: ------------------------------------------------------- > Thanks for the schematic. It appears that I'm > doing something completely different and likely > wrong. The diagram shows the step for the motor > drivers connected to digital and sometimes > digital/pwm outputs. Looking through the Arduino > examples they have the stepper driving by > digitalWrite cby freds - Controllers
Very interesting! It looks like the heater fits into a external sleeve that has tip to send more heat out to the tip. Where does the filament enter? sid Wrote: ------------------------------------------------------- > Larry, > > I had exactly the same trouble with machining > parts, so I kindly asked a company (who's making > soldering irons) to custom build one of there >by freds - General
Early rapid prototype machines did nothing but cut multiple layers of paper that you glued together! Maybe you would want to use the program referenced as it shows you a layout of the layer that it is cutting. The main page has a like to a artical showing how to layout a custom shape to cut in a svg editor. My understanding is that the svg file type is open and in xml format.by freds - RepLab Working Group
Hi Leav Thanks! Just what I need to start checking my new repstrap, of which I only have the X & Y axis working at the moment. The first one of your scripts I am going to use is pRINToPTO as I using used xy stages that hall effect limit switches on them that I have to check functionality on. Is the arduino IDE enviroment suppose to display the output of the script on the display? It doeby freds - Reprappers