Forum Replies Created
-
Posts
-
Okay– great to know that it’s up and running, and that it was (same as in the previous case of this error) a USB extension cable that was causing the problem.
Since things are working well, we would not recommend switching EBB firmware versions. There are newer firmware versions, but we are still installing 2.0.1 on new EBBs, and do recommend sticking with that for the time being. (There are some nice features in the newer firmware, but we are still working to ensure full backwards compatibility.)It is true that the “cancel” button does not work in Inkscape– this is a known issue with Inkscape that is unfortunately not within our capability to change. However, you do not need to unplug the USB cable. As it says on the “Making your first plot” page of our instructions, you can pause a plot in progress by using the “PRG” button on the EBB. (You can also press the “RST” button, to cause an error that will cancel the plot. )I am not entirely sure what is going on here. It could be an issue with the file– and I would be interested to see the file to check — but a serial read error typically indicates a hardware problem. For example, in this case: http://forum.evilmadscientist.com/discussion/78/error-reading-serial-data-#Item_11
Upon disassembly, it appears that the servo in question had its cable installed backwards. Unfortunately, that’s the sort of manufacturing error that might sneak by QC, if the tester also plugged it in backwards. :P
Anyway, I’m glad to hear that it’s up and running now. :)This is an independently created file, uploaded to the Eggbot code repository– I don’t think that anyone currently involved with the Eggbot project has tested this.
It should be straightforward to copy the relevant parts of the Eggbot extensions for Inkscape into separate files that you can call independently. Alternately, you might want to look at driving the EBB directly from its command set, or using RoboPaint– the latest version has experimental support for the Eggbot and an open API.Yes, sounds like a faulty driver board. One thing that you could do is to remove the board from the Eggbot, and visually inspect the solder joints on the terminal blocks to see if you can see anything obviously wrong. But, it’s probably best and easiest if you contact our store directly about exchanging the EBB for a replacement: http://shop.evilmadscientist.com/contact
I’m sorry to hear about the trouble. It could be a problem with the driver board, with the motor, or with the wiring. Please try swapping the motor wires, so that the opposite channel of the driver board is driving each motor. Hopefully, that will help indicate what’s causing the problem.
You do need to use the V= I * R formula, in almost all cases. The exception– the only case where you do not –is when the forward voltage of the LED is greater than the voltage source you are providing (for example, a blue or white LED driven from 3 V).
Also, an LR44 is a 1.5 V alkaline cell. Three C cells can replace three LR44s.Hi Thomas,
I see that you’ve sent a duplicate request on this issue by e-mail. If the servo motor does move, but in one direction only, that does sound like it’s broken. We’ll follow up by e-mail about sending you a replacement.-WindellYes, Sparkfun is one of our distributors– Please use the contact form on our website, and we’ll ship you a new motor. :)Hi Ragnar,
You certainly do not need any review to post code.We have not implemented this in the main trunk of the code because the command query was added in one of the newer firmware versions– not every EBB supports it with the firmware that it came with originally. (Our plan had been to check the system voltage, to detect if the power supply were unplugged.)Yes; a damaged motor, or (perhaps more likely) a bad wire on the motor. Carefully check the wires, to see if one of them looks like it might be pinched or broken, to see if there’s an obvious way to fix it. If not, you’ll need a replacement motor. Assuming that this is a brand-name Eggbot, please contact our shop directly about getting a replacement.
I would agree with all of those suggestions. Check to make sure that you’re using the right power supply (usually 9V, 1.5 A), and, I’d be curious if you could say whether the egg motor is acting the same way.It’s straightforward, but you should use the method described in the article: Start with the current and voltage, and work forward to the resistor that you need.
The mAh rating of a battery should only come in as a secondary consideration. That rating simply means how much energy is stored. If you are using two C cells in series, each rated for 8000 mAh, then you have 3 V total, with a capacity of 8000 mAh. Thus, if you were drawing 1 mA through the batteries to your LED, then it would run for 8000 hours.If you didn’t go to the Layers tab, then that would explain the situation.
Jim,
Is there any chance that you changed the active tab back to the first tab, “Plot,” before clicking Apply? It will only pause between layers if you click Apply while the “Layers” tab is active.-Windell
