Hi- This is a very annoying occurrence for me. Here is what happened: I was printing a scaled up twisted bottle. It was a ~4 hour print, i was 3.5 hours in. All the light were off in my room and I was downstairs. I went up to check on it. I could hear it printing. As I walked into my room I hit the light switch... well, I accidentally hit the switch for my ceiling fan. The printer stopped. This has happened more than once and I obviously know the fan is the problem. Ive had problems with a few other devices/appliances. My question is simple: How do I fix it? -Nick https://reprap.org/forum/read.php?1,154262,154262#msg-154262 Sat, 11 Jul 2026 16:41:02 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?1,154262,154721#msg-154721 https://reprap.org/forum/read.php?1,154262,154721#msg-154721
I found an old UPS and plugged both computer and printer into it.
It didn't work.

But in one last test I was running a dry print. I had someone else turn on the fan... The serial connection did not stop and the print kept running. Then, They turned off the fan. The Serial lights stopped, and the printer a few seconds later.

So the Serial connection is the problem, because the printer can run after the fan, the only reason it stops is it receives no command.

Does this lead anyone to some different ideas/solutions?

-Nick]]> N314 General Sun, 16 Sep 2012 10:10:15 -0400 https://reprap.org/forum/read.php?1,154262,154637#msg-154637 https://reprap.org/forum/read.php?1,154262,154637#msg-154637 -------------------------------------------------------
> Known causes of print freeze include:
>
> 1. Turning on appliances that draw lots of
> current, like microwaves, ceiling fans, Air Con.
>
> 2. Windows 7 64-Bit.
>
> 3. Some Arduino MEGA 2560 R3.
>
> 4. USB power management enabled.


Yes 1. Definitely

No 2. Running windows (not 7)

No 3. Arduino Megan 2560 is not an R3

Perhaps 4. Never thought about that... Ill have to check on that

-Nick]]> N314 General Sat, 15 Sep 2012 18:37:34 -0400 https://reprap.org/forum/read.php?1,154262,154625#msg-154625 https://reprap.org/forum/read.php?1,154262,154625#msg-154625
1. Turning on appliances that draw lots of current, like microwaves, ceiling fans, Air Con.

2. Windows 7 64-Bit.

3. Some Arduino MEGA 2560 R3.

4. USB power management enabled.]]> jcabrer General Sat, 15 Sep 2012 17:54:04 -0400 https://reprap.org/forum/read.php?1,154262,154579#msg-154579 https://reprap.org/forum/read.php?1,154262,154579#msg-154579 can reduce some conducted transients, but UPSes are disparate in their level of filtering from model to model, they don't catch everything, and they should not be considered a "universal solution" to the noise issues, even if it works for your fan. I suppose it's worth a try to solve your particular issue in your particular situation if you happen to have one handy, but personally, I wouldn't say "yeah go buy one, it'll fix it fer sure!". It's worth a try if you have one and it's rated for at least the maximum current load the printers' power supply(s) demand.]]> xiando General Sat, 15 Sep 2012 12:44:58 -0400 https://reprap.org/forum/read.php?1,154262,154566#msg-154566 https://reprap.org/forum/read.php?1,154262,154566#msg-154566
[www.amazon.com]
[www.amazon.com]
[www.amazon.com]

Do you think these would solve the fan surge issue?

-Nick]]> N314 General Sat, 15 Sep 2012 10:29:55 -0400 https://reprap.org/forum/read.php?1,154262,154538#msg-154538 https://reprap.org/forum/read.php?1,154262,154538#msg-154538 NelsonRap General Sat, 15 Sep 2012 03:49:20 -0400 https://reprap.org/forum/read.php?1,154262,154505#msg-154505 https://reprap.org/forum/read.php?1,154262,154505#msg-154505
12Volts, RAMPS 1.4, Old dell (probably like 2002-2005ish), pronterface.

Not to be dumb but Im no engineer, whats a UPS?

-Nick]]> N314 General Fri, 14 Sep 2012 22:51:45 -0400 https://reprap.org/forum/read.php?1,154262,154483#msg-154483 https://reprap.org/forum/read.php?1,154262,154483#msg-154483 It will continue printing from at the correct location.]]> peddiparth General Fri, 14 Sep 2012 20:00:59 -0400 https://reprap.org/forum/read.php?1,154262,154417#msg-154417 https://reprap.org/forum/read.php?1,154262,154417#msg-154417 know am guessing it's probably not "the solution" you wanted hear, but it's far more certain than a suggestion to solve this or that issue with shielded electronics, cabling issues, resolving all coupled power supplies, adding isolated USB interfaces, etc. Solution could be as simple as adding a beefy cap to your power supply or as complex as gutting your present electrical/electronics system to redo it from scratch.

If nothing else, if it continues to happen once you're printing from SD, then you know you have issues in your wiring and or unshielded microcontroller if the printer continues to seize when it encounters known triggers like switching on your fan.]]> xiando General Fri, 14 Sep 2012 13:15:55 -0400 https://reprap.org/forum/read.php?1,154262,154415#msg-154415 https://reprap.org/forum/read.php?1,154262,154415#msg-154415 thecrazy General Fri, 14 Sep 2012 12:58:33 -0400 https://reprap.org/forum/read.php?1,154262,154414#msg-154414 https://reprap.org/forum/read.php?1,154262,154414#msg-154414
Its very possible that power fluctuations or emi in the AC line causes issues. When you turn on a ceiling fan there is a motor in there that draws a lot of current on startup, that alone is probably what cause your problem. You should try pluggin into another circuit (different breaker).

A UPS wont do much unless its a very expansive model that does double conversion (eliminates all the noise in the AC line by converting ac to dc and back to ac again). I doubt you have that.

Its probably easier to plug somewere else or work with us to figure out how to properly shield and filter our electronics. There is also a possibility that windows isnt helping. You should join us in the other thread and please let us know more about your setup, electronics, psu, what your plugged into and how, your os, etc...

The other thread]]> thecrazy General Fri, 14 Sep 2012 12:57:16 -0400 https://reprap.org/forum/read.php?1,154262,154411#msg-154411 https://reprap.org/forum/read.php?1,154262,154411#msg-154411 billyzelsnack General Fri, 14 Sep 2012 12:48:28 -0400 https://reprap.org/forum/read.php?1,154262,154409#msg-154409 https://reprap.org/forum/read.php?1,154262,154409#msg-154409 Idaholion General Fri, 14 Sep 2012 12:31:14 -0400 https://reprap.org/forum/read.php?1,154262,154407#msg-154407 https://reprap.org/forum/read.php?1,154262,154407#msg-154407 Polygonhell General Fri, 14 Sep 2012 12:24:28 -0400 https://reprap.org/forum/read.php?1,154262,154368#msg-154368 https://reprap.org/forum/read.php?1,154262,154368#msg-154368 No I am not trying to recover the print.
-nick]]> N314 General Fri, 14 Sep 2012 08:31:32 -0400 https://reprap.org/forum/read.php?1,154262,154271#msg-154271 https://reprap.org/forum/read.php?1,154262,154271#msg-154271 Idaholion General Thu, 13 Sep 2012 23:58:49 -0400 https://reprap.org/forum/read.php?1,154262,154262#msg-154262 https://reprap.org/forum/read.php?1,154262,154262#msg-154262
This is a very annoying occurrence for me.
Here is what happened:

I was printing a scaled up twisted bottle. It was a ~4 hour print, i was 3.5 hours in. All the light were off in my room and I was downstairs. I went up to check on it.
I could hear it printing.
As I walked into my room I hit the light switch... well, I accidentally hit the switch for my ceiling fan.
The printer stopped.
This has happened more than once and I obviously know the fan is the problem. Ive had problems with a few other devices/appliances.

My question is simple:

How do I fix it?

-Nick]]> N314 General Thu, 13 Sep 2012 22:22:58 -0400