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brentwerder

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brentwerder last won the day on June 3 2016

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About brentwerder

  • Birthday 01/01/2015

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  1. brentwerder

    Issues with UMO+ Board

    Just tried hooking up the fans in series. I tried all the fans I have, but they all have the same problem. One fan (an old one) starts up at around ~80 PWM and the new ones all start at ~235 PWM. It doesn't look like any of them are dead, but they have very high startup voltages. Strange considering they are the same brand and model that I bought from Amazon before. It looks like I either need to settle with very fast fans or purchase some new ones on Amazon. Any recommendations for better quality ones?
  2. brentwerder

    Issues with UMO+ Board

    Well, there's a few problems out of the way! Not sure how it happened but those two jumpers were missing. I added them back and power returned to the always-on fan and heaters. Thanks for the suggestion! Unfortunately, my dual fan problem persists. Not certain how to fix that.
  3. brentwerder

    Issues with UMO+ Board

    Hello again, Just spent a few hours trying to get my UMO+ up and running again with no success. My problems all stem from the main board, which is giving me a ton of trouble. My machine has an E3D v6 with two 12v fans wired in parallel, which had worked for a few months before a transistor blew (see my last post). After this happened, one fan wouldn't start and the other worked fine, so I replaced the faulty one with a new one. The replacement didn't work unless I turned the PWM to >240. I just got in some new fans and the same applies with these. Additionally, both heater outputs (heater block and bed) aren't giving me any outputs. The thermistors work fine, but the heaters themselves don't heat up at all. Checked the board and there is no voltage at either output when heating. I can't home the axes or move motors. Those seem to be dead too. No voltage output from board there. Finally, the 24v always-on fan on the E3D isn't turning on. No voltage from any 24v output, but the PSU is giving me 24v. Strangely enough, there's a 5v fan out in the middle of the board that does give me 5v. From my standpoint, I would guess that a fuse (or something similar) is dead somewhere. The only thing that seems to be "alive" on the machine is the screen, which is perfectly fine, and the fan output--which is half fine. Any advice would be greatly appreciated. Fingers crossed I don't have to shell out the cash for another board...
  4. brentwerder

    Fan PWM Broken...

    Just replaced the board with a spare I had sitting around, and the Fan PWM on that board was working fine, although one of my fans wouldn't start up until I hit 255 PWM. Weird, since I bought a new set of the exact same fan from Amazon. Any clue what's going on with that? Unfortunately, there's another problem: the 24V J19 output (next to the power supply) is busted. It reads 0V, so my always-on fan won't work. Is there another spot on the board I can grab a constant 24V from? Or would it be possible (sorry, not an EE) to use the GPIO outputs to do that when the temp is above 50C or something? My Prusa does something similar to that.
  5. brentwerder

    Fan PWM Broken...

    Thanks for the reference. I picked up 10 of those diodes from Digikey (in case I screw up soldering a few times). In the meantime, so I can get back up and running, I think I'll try to reroute my fans to the LED PWM. How exactly did you do that? Thanks.
  6. Just got back to work on my Ultimaker Original Plus: my dual 40mm 12V fans have stopped working. One of the fans had seized up, and I bought replacements to fix the issue. However, after soldering the new one in place, they wouldn't run. They're wired in parallel. The wire going from the board to the fans is OK, just tested that. I'm not sure if the Fan PWM output on the board isn't good anymore, or what. I tried testing the voltage of it when the fans are on at 255, but I'm not sure what the normal voltage is. -Brent
  7. brentwerder

    Irregular Circles on UMO+

    Recently I've had quite a bit of trouble getting technical prints (especially very small ones with tight tolerances) to print right on my UMO+. It looks like my printer isn't printing circles right at all. As you can see, the tolerances here are off by about a millimeter. The irregular circles are very repeatable, too - the odd oval shape is the same through the part. Even just looking at the part, it's obvious that it's not completely circular: I've tried every suggestion I could find on 3DVerkstan, which helped the problem a bit, but it's still there and it's enough to keep very small parts from printing correctly. I turned my acceleration down to 1800mm/s^2, and I printed the part pictured at 15mm/s just to make sure my speed wasn't a factor. My Ultimaker has an E3D V6 with a mount that holds it pretty tightly. I don't think that's likely to be the issue. I might just want to order some new timing belts for the motors, but those seem pretty tight to me. Any other suggestions?
  8. Alright, the PT100 is dead. It's reading about 3 megaohms whenever I test it, and it looks like the wire is frayed. I'll order a new one ASAP.
  9. Okay... bad news. I played around with resistances and different configurations of the bed thermistor and the hotend thermistor, and nothing worked. I found that the E3D Semitec thermistor is in very good condition. The resistance instantly went down from its starting 121.7 kilo ohm resistance at room temperature when I held onto it. I pulled the PT100 out of the old hotend and tested its resistance, which was around 3 megaohms. I really have no idea if that's normal. It doesn't seem like it, but then again, the thermistor was working perfectly before disassembly. Possibly a bad reading? It was very hard to get contact when measuring. I unplugged the bed and first tried the hotend PT100, which read 11000C, the same as the hotend readout. It read 11000C if I had either of the hotend thermistors in either TEMP1 or TEMP3. However, it read 20C when I plugged the bed into TEMP1 or TEMP3 - meaning the connection is still good on TEMP1! Hooray! I believe this means one of three things: Option A is that the firmware is somehow not accounting for either hotend thermistor and is instead not reading anything at all. This means that I only have to make a good firmware build and the issue should be resolved. This is my favorite option. Option B is that the hotend PT100 is busted (it had a weird reading, which I think I'll redo later since it fluctuated so much). That would explain why another PT100 in the bed read correctly, but that one wouldn't. It also means that if I change the firmware the E3D should work correctly. Option C is my least favorite. The hotend PT100 is broken, AND the E3D is either broken or not supported by the Arduino Mega. I really don't know much about electronics, so I have no idea whether or not a 121.7 kilo ohm thermistor will work correctly on this board. I'm now able to perform tests again on my machine, so if you have any ideas as to what I should try next, I'm all ears.
  10. Good idea! I didnt know I could use TEMP2. I'll try that ASAP, which might be in a few days.
  11. Hey all, Finally getting around to making those E3D mods I said I would a few months back... oops Kit assembly is now easier than ever - seems like they've modified the electronics to be easier to work. It comes with a neat little 100k ohm Semitec 104GT thermistor which is held in the heater block with a grub screw. The thermistor and fan now come with detachable Molex terminals which make modifications and maintenance 10x easier than dealing with the mess of wires with the old hotend. However, before assembling the heater block, I tested the thermistor resistance and got some crazy number waaay off from what it should be. I did some testing with it in the printer (modified firmware) and got a constant 9 degrees from it at room temperature , which didn't change no matter what I tried - even when unplugged. Definitely dead - currently working with E3D to get a replacement going. I had my buddy print me a nice little mount (http://www.thingiverse.com/thing:1742018) for the hotend, and it seems to be holding very well. Almost more solid to the touch than the old assembly - even though I accidentally used an Ultimaker 2 mount. The only difference there was the reversed axes, so now the print head is in the back right corner instead of front right. Oh well. Here's the real issue - the firmware. Since the old thermistor didn't work, I plugged my old PT100 into the slot where the Semitek should go; they're the same diameter and the PT100 is about a millimeter shorter. I know the PT100 works fine, since I hadn't had any issues with it when it was installed in the Original + hotend assembly. However, when using the same firmware, which should account for the PT100, I got the Err: MAXTEMP popup. When connected to my computer, the hotend showed a 11000C readout at room temperature. The readout remains the same when unplugging the thermistor. I'm afraid to say the motherboard might be the issue here, but I'm not sure. Both thermistors did not change the temperature readout when being plugged/unplugged from the board. Lucky for me, I happen to have a flawless extra board which I can do some testing on, but I'd rather not plug anything into it before getting some feedback from you. Thanks! -Brent
  12. brentwerder

    Totally busted extrusion on Ultimaker Original +

    I think I found a culprit. It's kinda funny how small it is, but I think it might be the problem! Boop! Completely stripped nut in the tensioner part of the feeder. This is the nut that held in the spring. I can't upload the photo I found in the assembly guide for some reason, but hopefully you understand which one I'm talking about. I'll try replacing it and I'll update later!!
  13. brentwerder

    Totally busted extrusion on Ultimaker Original +

    Okay, I lied. Tried another cube with a lower temperature material. Failed within a minute of starting it. what's going on?!
  14. brentwerder

    Totally busted extrusion on Ultimaker Original +

    Alright. I dont know what to make of this next print, but I think it's better than nothing!! The entire print is underextruded, but the good thing is it's constant underextrusion - which means it was feeding (at least kind of) the whole way through! I'll tweak a few more settings, since I was printing with a high-temp filament. Hopefully this means the next print will work great!
  15. brentwerder

    Totally busted extrusion on Ultimaker Original +

    Don't worry - I know how the feeder should be when it's ready to print! Otherwise I'd have quite a bit of trouble getting it to work at all
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