New fan behavior


#1

After a cut finishes now, a new fan action happens, where the fan seems to run at really high rpms
(maybe in reverse?)for 3 or 4 seconds. What’s that all about? Did I miss a memo?

I need to figure out which fan it is, air assist? Exhaust? Confused.

Definitely air assist, see below.


Afterblow - new ventilation of the head
Hey I just heard a fan I've never heard before
#2

No reason for either to run backward… By any chance are you lifting the lid before the fan sequence finishes? Doing so definitely allows the fan to speed up. My constant-on exhaust booster speeds up as well whenever I open the lid.


#3

Hmm possibly. I think I open it, then there’s a pause, then the fan kicks on. I should try to repeat it.


#4

Repeatability is good. Standard behavior (afaik) is fan at idle, ramp-up at beginning of job, full tilt during job, then ramp-down to idle after the job is complete (post-photo has been taken and UI indicates it’s ok to open the lid). I’ve never had the fan come on in response to opening the lid.


#5

OK it’s running the air assist fan at full blast.

Weird and new.


#6

Ok, that is new and weird. I’ll try tonight and see what happens.


#7

I heard that earlier and was thinking that it was the Glowforge getting a little hot and it was pushing the coolant through for a few seconds after the cut. I’ll have to look again in a little bit when I make a cut. Glad it’s not the coolant, since I have the air on 73 :slight_smile: (hottest day of the year so far, up to 96.3 right now, heat index of 102)


#8

I heard it on mine today too. I could tell it was a fan, just not which one.


#9

Think its actually the purge air (the little fan on the back of the head) rather than the bigger air assist fan set further off to the rear.


#10

Hmm I wasn’t aware there were 2. Learn something new every day. @jbmanning5 are you guessing by my video or did you get the same behavior? I wonder if this is an update? Nothing in the UI yet.


#11

I just ran a quick little score job. Seems that it happens with the lid closed or open. I may, or may not have, opened the lid and stuck my hand under there.


#12

Yeah I did too, felt like it was coming right from the lens.


#13

At least I left a shroud of mystery as to whether I really did or did not stick my hand in there :wink:

Since the purge isn’t using clean air, I wonder if that last little bit of runtime helps circulate cleaner air through (than you get in the cut / engrave process, at least) and perhaps lessen the need to clean both the lens and mirror in the head. I feel like I’ve had to clean both fairly frequently.


#14

Hmm good theory. Also possibly explains why it waits until the head is homed (and away from the cuts in theory) first.


#15

Would you boys just get your heads down in there so you can see what’s going on? You can tell me all about it so I don’t have to.

Thank you, much appreciated! :rofl:


#16

Wishing I’d bought this when I was considering one last winter…


#17

I’ve got a couple. They are an absolute necessity for diagnosing issues with these things, so you should consider going ahead and springing for one anyway. Eventually you are going to need it.


#18

Do you get referral fees from Amazon, @Jules and/or @evansd2? Now, in addition to buying more and more materials, it seems that each time I browse the Community, I end up having to buy new tools at Amazon… :wink:


#19

New firmware just came out - v1.4.0-21.

Probably explains the difference.


Anybody else have "new" sounds?
#20

https://www.homedepot.com/p/Husky-Round-Lighted-Inspection-Mirror-80556H/206266275

Better? :wink: