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Glad you got it working! You're way ahead of me. I've just been hacking firmware and playing with some motors & hot ends on a table while I wait for my other parts.
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lincomatic2
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Firmware - mainstream and related support
We think alike. I bought a steel coupling to see if it would reduce the heat transfer to the PTFE. Measured the temperature at the threads. For some strange reason, it was actually hotter than with my brass coupler, and the hot end takes longer to warm up with the steel, too.
by
lincomatic2
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Plastic Extruder Working Group
Hi Viktor,
Yes, I tried to contact Sebastien with no luck. If you could delete my pending account, that would be great. Thanks a lot.
Also, if you need any help with forum moderation duties, I'd be glad to lend a hand.
Thanks.
-Sam
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lincomatic2
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Administration, Announcements, Policy
Simon,
It is not a good idea to call your site Reprap Walmart .. Walmart is a registered trademark, and you are infringing on their trademark. They can file a lawsuit and close you down. Also, your website says Repraper everywhere. I think you mean RepRapper. If you look up the word "rape" in an English dictionary, you will understand why you should change that as soon as possible.
I see you
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lincomatic2
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For Sale
OK, first of all, I don't know why you changed your upload.protocol to arduino.
It's not a valid protocol for avrdude.
If you have a standard Arduino bootloader installed, it should be using stk500.
Everthing else looks OK.
Does your Sanguino have a bootloader in it? If not, you need a programmer to install the bootloader.
I can go over that part if you need to, but first try
sanguino.upload.
by
lincomatic2
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Firmware - mainstream and related support
You can try this ceramic tape:
Makerbot sells it as well.
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lincomatic2
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General
Does anyone know who the forum admin is? I have a user ID stuck in limbo, because hotmail can't receive my account confirmation email.
by
lincomatic2
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Administration, Announcements, Policy
Overheating when idling is probably an issue with a lot of hot ends.
Maybe we should add a function to existing host software to cool the heater down to a safer temperature if the motors are idle for too long?
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lincomatic2
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Plastic Extruder Working Group
Arduino programs the fuses, but it doesn't hurt to check them with avrdude afterwards.
by
lincomatic2
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Controllers
Extract all of the contents of the winrar archive. Then in Device Manager, right click the Mega and select Update Driver Software from the menu. Then click "Browse My Computer for Driver Software." In the next screen, point it to where your INF file resides, and it should install the driver.
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lincomatic2
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General
It looks pretty cool. Bear in mind, though, that the 328 is too small to run Marlin in its current incarnation.
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lincomatic2
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Controllers
I was running them on different supplies, and sometimes, I would forget to turn off the 12V supply when the 5V was turned off.
It seems like it's OK to do that for a few seconds, but for longer periods, it's not.
I didn't see anything in the spec sheet saying that the logic supply needs to be turned on before the VMOT.
I know the TB6560 has a specific sequence, but I don't see any similar languag
by
lincomatic2
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Stepper Motors, Servo Motors, DC Motors
econobelt.com doesn't sell by the foot, but they have very long (4M) ones.
since they custom make them you might be able to get raw belt by the foot if you ask.
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lincomatic2
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Mechanics
I noticed that the values in thermistor.h of Sprinter and Marlin are different from the ones created by the included createTemperatureLookup.py.
There's a definition for a 100K EPCOS, but it doesn't say which model. I have the B57560G1104F. Where can I obtain the appropriate temperature table data? It would be nice to know how to generate the values, too. TIA
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lincomatic2
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Firmware - mainstream and related support
Hmm.. seems like you've done your homework.
Here are some ideas:
1) try connecting directly to the computer (no external hubs)
2) try downloading and installing the latest driver directly from FTDI
3) turn off your power management. I've seen some computers will power down the USB if the computer idles too long
4) try a non Python-based gcode sender such as repsnapper or replicatorg
Good luck!
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lincomatic2
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Controllers
If you want to run your motors >~1A, you should put heatsinks on the A4988 chips in the Pololus.
Otherwise, you'll get thermal shutdown, and the motors will stutter.
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lincomatic2
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General
The SD card is probably useful anyway, but I think something is wrong with your serial setup if pronterface is giving long delays. Have you tried typing gcode directly into a serial terminal to see if the mega is responding correctly?
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lincomatic2
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Controllers
No, I'm very careful about tight connections and not disturbing them while powered up.
Does anyone else have issues with power on sequence of VDD/VMOT?
Andrew Diehl Wrote:
-------------------------------------------------------
> Did you disconnect the motor while there was power
> to the chips? This seems to be the most common
> failure mode.
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lincomatic2
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Stepper Motors, Servo Motors, DC Motors
I'm playing w/ Teacup on a Deumilanove, which also uses the 328P. One problem I ran into is the there seems to be some setup issues with the analog pins ... I couldn't get the x motor to step until I moved it to a digital pin. I hooked up a scope and found that when I use a digital pin, I get nice square waveforms, but on the analog pins they're distorted. Probably just missing some code to pr
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lincomatic2
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Controllers
If they're running extremely hot, then you need to add a heatsink and/or turn down the current. When you get them hot enough, the thermal protection will make them skip a lot. There's a tutorial on adjusting current here:
If you're running >1A, w/o a heatsink they'll definitely overheat.
Even with this precaution, I had one catch on fire the other day, too. My guess is that it's because
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lincomatic2
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Controllers
Does anyone have any recommendations for accurately cutting t-slot extrusions? I am thinking of using my mitre saw, but don't know what kind of blade would be appropriate. TIA
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lincomatic2
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Extruded Aluminum Frames
I've had 2 of them go bad, as well. Running the VMOT from 19V, VDD from USB. The current is set to < 1A and they are heatsinked. Even if they were to get too hot, isn't the thermal shutdown supposed to handle that w/o damaging the chip? Does the sequence of powering up VDD and VMOT matter? I don't see anything in the spec sheet for the A4988, but I've noticed that the TB6560 is sensitive t
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lincomatic2
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Stepper Motors, Servo Motors, DC Motors
Printrboard is a fork of Teensylu. The main difference is that the A9688's are soldered directly onto the board instead of plugged in (so be careful not to blow them up!). Marlin wasn't compiling properly for Teensylu, so I submitted a bug report, and Erik already fixed it. However, I haven't been able to test it, since I don't yet have a Printrboard. Sprinter also compiles fine.
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lincomatic2
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Controllers
- 13 years ago
- 13 years ago