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Thread: i3v 12" build log
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12-23-2014, 11:27 AM #71
Are they compressed or cut off? If compressed, what values are you using for DEFAULT_STEPS_PER_UNIT in configuration.h? Another thing to check would be to make sure the tubing shaft couplers on the Z motors aren't slipping.
FWIW, both of these posts suggest the heat bed on the 12-inch printer draws a LOT of current. More than just the linear increase expected due to the increase in heater area.
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12-23-2014, 11:46 AM #72
- Join Date
- Dec 2014
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- 33
Interesting I have not had this issue with my heat bed yet. The power supply I use http://www.amazon.com/gp/product/B00...?ie=UTF8&psc=1
Which i had used in the past for LED lighting display that had a couple thousand leds and is UL certified. The fan on the power supply has not kicked in yet. I am also using a aluminum bed which has a higher thermal conductivity then glass but the close to the same heat capacity as glass.Last edited by bstag; 12-23-2014 at 11:53 AM.
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12-23-2014, 03:16 PM #73
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- Aug 2014
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- 24
Thanks for the information. The prints are compressed. I'm not sure what the default steps per unit is set to. I know I haven't changed it, but I will check and see what is set. I'll try to mark the tubing/rail/shaft with a sharpie and see if it is slipping. I did order a couple of metal couplers a while back, but the ones I wanted I could only find shipped from amazon, so I think I have a week or two before I see those.
As for the PSU/Heatbed, I also ordered a 12v 30a LED power supply for ~$25 from amazon and Ihaven't had any issues. I'm using corkboard as insulation and it does take a couple of minutes to warm up, but I haven't timed it. I will try to remember to do that. I used Fork Crimp terminals on the wires attached to the PSU if that makes a difference.
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12-23-2014, 05:55 PM #74
- Join Date
- Nov 2014
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- 58
I'm pretty sure I got a bad PSU to start with. From the beginning it sounded like it was going to explode. I will measure the overall current when my new PSU arrive. I'm guessing that the consumption is pretty close to 30 amps when the bed and extruder are on.
I bought a 12v 75 amps server PSU to be in the safe side. Most of the big 3d printers use 24v..
Ender 3v2 poor printing quality
10-28-2024, 09:08 AM in Tips, Tricks and Tech Help