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Eric Pavey
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Eric Pavey

Questions/Help  - 
 
Marlin question on adjusting the power going to the hot-end heater cartridge:

I've been having issue when my cooling fan kicks on, where my extruder temp drops a lot, for a while, before things slowly warm back up.  Covered in detail here:
https://plus.google.com/u/0/117814995679657521943/posts/fjHT5pr9s53?cfem=1
This is a (insulated) 1.2mm E3d volcano nozzle extruding at 45mm/sec, 600 micron layer heights with a 25cmf fan (running at a variety of speeds).  I'm using a Rumba board, 12v, with a 500w power supply.  Power is not a problem (as discussed in the above thread).
What it looks like is the hotend can't keep up with both a cooling fan & the cold filament pushing into it.

After much troubleshooting, I was tipped off to see what M105 was returning.  During the nozzle heat (before a print, or when the fan kicks on), it gives me this:
RECEIVED: ok T:206.1 /220.0 B:26.0 /0.0 T0:206.1 /220.0 @:127 B@:0
And from what I understand, power is @:127... basically 50% : It never goes to 255 (If I'm reading this correctly).
Poking around in my firmeware, all the pid-related settings are at 255, and I don't know where else this sort of thing would be set.

Anyone have any thoughts?  Am I on the right track?  
On a side note, a more powerful heater cartridge is on order...
Thanks!
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ThantiK's profile photoMarcus Wolschon's profile photoEric Pavey's profile photo
10 comments
 
Just an update:  Got the 40w (really, 35w based on my measurements) installed, and now it 'just works':  Can print 'fast' with 'full fan' and it maintains temp just fine.  Mystery solved.  More details on my blog:
http://www.akeric.com/blog/?p=3673
Thanks again for all the help and feedback!
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Eric Pavey

Discussion  - 
 
New ChiliPeppr user.  Have used it successfully for a couple of test cuts now.  I'm using an X-Carve\grbl.
The one issue I'm having is that it will randomly just pause itself 2-3 times during a cut (1.5 hours-ish).  If I hit the ~ / unpause button, it'll launch back to life.  Any thoughts?  I'm on a mac, using Chrome.  Really great tool by the way :)
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Eric Pavey's profile photoFrank Graffagnino's profile photo
10 comments
 
I believe so. Do a Google search for configuring GRBL
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Eric Pavey

Show-n-tell  - 
 
The Mrs. wanted a 3d printed reindeer, so I grabbed the 'Holiday Christmas Deer' from Thingiverse: 20" tall, 9 hours print time, 90mm\sec, 300 micron, .6mm nozzle, blue GizmoDorks PLA.  Timelapse:
https://www.youtube.com/watch?v=tVTSzDbF3Eo
Pretty happy with the surface quality.
45
Peter Sharma's profile photoSelva kumaran's profile photoEric Pavey's profile photo
14 comments
 
In all honesty based on the lighting in the pic, and the size of the print make it look smother than it is. Although even in person people content on its smoothness. You can easily see the layer lines up close (it is 300 micron), but the overall quality and consistency is quite good. Which I would attest to the overall corexy design style of the printer, and my obsessive compulsive attitude to tuning print settings ;)
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Eric Pavey

Show-n-tell  - 
 
Recently printed out a life-size pirate head for a buddy at work (he sculpted it in zbrush).  Pretty happy with the results.  Print stats are in the link.
I was recently approached by one of my co-workers, Diego Teran, if I could 3d print a zbrush sculpt he'd done of a pirate head. Looking at it, I realized it'd be a perfect candidate to print life-...
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Glenn West's profile photoIvan Hoe's profile photo
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Eric Pavey

Questions/Help  - 
 
In gcode (for Malin), is there a way to store \ recall the last XY position?

I'm trying to interject some gcode for a print, so when it hits a specific layer I can pause it for filament swap.  The plan is: "store position", drops Z by 10, homes XY, waits for the user to press the button on the LCD, then raises the bed by 10, and goes back to the "stored XY position".  I have all that except the "store position" & "go to stored position"  bit.  Any thoughts on how I can do this?  Current code:

??? ; Store last XY position
G91 ; Relative positioning
G1 Z10 ; Lower the bed by 10mm
G28 XY ; Home XY
M0 Click To Continue ; Pause the print
G1 Z-10 : Raise the bed back up 10mm
G90 ; Back to absolute positioning
??? ; Restore last XY position

Right now it all works except after the G90, it does't go back where it should.

Did I mention I miss Sailfish?
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AATHIF AHMED O F's profile photoEric Pavey's profile photoBranden Coates (GearheadRed)'s profile photoTac Huynh's profile photo
5 comments
 
+Eric Pavey​ cool glad to know it worked for you. 
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Eric Pavey

Show-n-tell  - 
 
Printed out (on my C-bot) a 19" / 500mm tall 3d scan of myself. Captured as a scanner test (not to feed my ego...), so why not try and print it eh? :P
http://www.akeric.com/blog/?p=3456
Overall pretty happy with it.  Had a few issues discussed in the blog.  Feel really comfortable throwing big prints at the C-Bot now.
Or "Really Big Me" depending on how you look at it: A few months ago I stopped by the "Artec3D Scanning Service and Showroom" in Palo Alto (CA) to check out their scanner tech.  While there, they o...
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Pierre Brown's profile photoAlejandro Perales's profile photoRayn Keiko's profile photoLouise Brown's profile photo
10 comments
 
+Eric Pavey​ got that tagged for a read... ;)
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Eric Pavey

Questions/Help  - 
 
Having a problem maintaining hot-end temp when my filament cooling fan kicks on:

I have a custom printer running Marlin, via a Rumba board.  I slice in Simplify3D, and then print via Octoprint.  Right now I'm printing PLA with a 1.2mm volcano nozzle with 600mm layer heights:  I lay four layers down, and then kick the cooling fan on.

The issue I'm having, and I'm not sure what this is related to, is that when the cooling fan kicks on, the printer doesn't compensate the nozzle temp for... a while:
At layer 4 the fan kicks on, and quickly my temp drops a good 10-15 deg.  It stays low for maybe 10-20 minutes, then suddenly jumps back up to where it should be, and stays there the rest of the print. 
If I start the print out with the fan on, the temp is correct the whole time.  As a hack, if I catch this, I can crank the temp way up (to like 230), and it'll heat up to roughly where it should be.  But then when things later "engage" I have to remember to drop my temp back down or it really heats up to 230.

In the Temperature tab in S3D, I have "Relay Temperature Between Each" Layer & Loop checked, thinking this would provide for the feedback the hardware needs to compensate.  But it seems to have no effect.

Any thoughts on this?

Thanks!
2
Ryan Carlyle's profile photoStephanie S's profile photoEric Pavey's profile photo
31 comments
 
Just an update:  Got the 40w (really, 35w based on my measurements) installed, and now it 'just works':  Can print 'fast' with 'full fan' and it maintains temp just fine.  Mystery solved.  More details on my blog:
http://www.akeric.com/blog/?p=3673
Thanks again for all the help and feedback!
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Eric Pavey

Discussion  - 
 
Just assembled my X-Carve, thought I'd give Chillipeppr a spin. Can cut just fine from Easel, but I get this from Chilipeppr:

"You must connect to your GRBL device using the GRBL buffer algorithm in this workspace. Connecting to any other buffer (default, tinyg, etc) will cause unpredictable behavior."

However, I can find no configuration options anywhere to make this 'connection'. Am I missing something right in front of me?

I'm on OSX 10.10.5, using Chrome.
Thanks!
1
Eric Pavey's profile photoFrank Graffagnino's profile photoKevin Hauser's profile photoDouglas Drake's profile photo
4 comments
 
I'm having the same problem but my server is connected and so is the device . i have also selected the proper baud rate of 115k. but to my dismay the grbl still does not connect. at this point i am lost in what to do.

any help would be appreciated

thx
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Eric Pavey

Show-n-tell  - 
 
Recently printed out a 20" tall Eiffel Tower model on my C-Bot. Came out pretty well IMO.
http://www.akeric.com/blog/?p=3543
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Vaughan Lundin's profile photoEric Pavey's profile photoGiligain I.'s profile photoAyan Sheikh's profile photo
11 comments
 
Google Drive to the rescue: Here's a link to the FFF I used to print it:
https://drive.google.com/file/d/0By7ZxutoFb71Y2RqTGY5ZUk0cE0/view?usp=sharing
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Eric Pavey

Questions/Help  - 
 
Question to the community about firmware comparisons:  

I've been researching this for a while and haven't found any one good spot that gives a nice comparison of certain functionality across them, so I figured I'd make my own.  Issue is, I only have experience with Sailfish & Marlin, and there are many other firmwares out there.  Hunting through forums, github, ggroups, and other esoteric locations is becoming tiring, and really this stuff could be answered quickly by those who actually use the firmwares.  

Since I know the answers to Sailfish/Marlin, I still have questions about Repetier, Smoothie, Redeem, RepRap Firmware, and any other types you'd like to contribute.

So here are my questions:

For Firmware X, does it support, via the LCD:
* Print Pausing?
* Easy Filament Reloading?  Meaning:  Save the xyz location, Drop the build platform a few mm, home xy, retract filament, wait for you to reload, prompt to restart, reset all stepper positions back to stored xyz, resume print.
* Defining a fixed z-height for pause?

To start, I can fill some of these in:

Sailfish:
* LCD Print Pause: Yes
* LCD Filament Reload : Yes
* LCD Set z-height pause: Yes

Marlin:
* LCD Print Pause : Yes
* LCD Filament Reload : No (I've tried enabling this in the firmware, but it doesn't seem to work)
* LCD Set z-height pause: No

Yes I know you can hack gcode to make this stuff work, and you can use something like Octoprint to issue commands as well..  My questions are specifically about operating the firmware via the LCD.

Many thanks!
7
Nathan Walkner's profile photoEric Pavey's profile photo
12 comments
 
For anything related to the reload in Marlin, I'd like to move this conversation to my previous thread here:
https://plus.google.com/117814995679657521943/posts/AKsitriFGxU

I'd love to keep this one for anyone else who has feedback on my questions above about other firmware's functionality :)
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Eric Pavey

Questions/Help  - 
 
Question about reloading filament in Marlin:
This is trivial in Sailfish which is on my other bot, and I'm pretty used to doing it via my rep1's LCD.  Digging around Marlin's Configuration_adv.h, I found a section dealing with:
#ifdef FILAMENTCHANGEENABLE
Which was commented out:  I enabled it, flashed the board, and now I get this snazzy 'change filament menu' in the LCD when printing.

Issue is this:  I execute the command via the LCD, it pauses the print, drops the built platform a few mm, homes the nozzle, retracts some filament and then.... the LCD goes blank, and my Rumba board starts making this weird chattering sound.  Twisting the knob on the LCD sort of makes the words show up again (weird), otherwise they vanish, and no amount of twisting the knob \ pushing the button makes the print resume:  I need to reset the board.

Anyone know what I'm doing wrong?  I'm using the RepRapDiscount LCD on the Rumba.

Thanks!
5
Keith Applegarth's profile photoEric Pavey's profile photo
5 comments
 
+Nathan Walkner : (from the conversation over here: https://plus.google.com/117814995679657521943/posts/BX76X2eC8SP)

I've been looking all over my marlin, and the one on github, and I'm not seeing what you're talking about (as far as it stating m600 is disabled) : What I see is the ability to enable it.  I believe you, but maybe we're somehow looking at different data?  Can you send me a link?  Many thanks!
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