RepRapDiscount "Bulldog XL" Geared Metal Extruder on a Solidoodle 3! (Page 6 of 13)

I think as a moving gift to michaudtime I will try to design one up so it's ready by the time he unpacks.  Hmmm.... Wonder how long I have? Better get designing.

I ordered up a couple of these fans and it seems to work fine for the intended purpose.
http://www.ebay.com/itm/35mm-7mm-New-Bl … 0629366620
I also designed up a rear/under mounted fan duct that works with the bulldog_wardjr_E3D_rev7support linear bearing mount for this fan.  The fan came with adhesive on the bottom and seems to stick well so I didn't screw it down.
The fan mount replaces the FBCAR6 and snaps into place the same way.  I found it a little tricky to get it to snap into place as the plate the fan mounts to hits against the rear bearing mount of the carriage.  To alleviate this problem the file have attached has been modified from the fan duct I have installed.  I simply lowered the fan and the duct from the front bearing mount by 2mm.  This should allow a little wiggle room to snap it into the carriage.  The end of the duct needed to be lower anyway.  This should be real close but may need a little clearance filed off depending on your particular assembly.
Print it solid at .3 with 2 perimeters and a 3mm brim.  Just like the carriage itself print it on edge as the support is built in and simply breaks away and cleans up well.  A good flat screwdriver will clean up the support on the upper/inner part where the bearing snaps in.
I will be adding this to Thingiverse and I will get a picture posted up as soon as I get in front of my printer.

It's a plus that it works well also

WOW! It looks great I can't wait to get my printer back and print it.  I love how it keeps everything compact. Amazing work!

Here it is installed you can see how tight it is to the carriage.  That made it hard to install so I just added a couple mm's of space.  Mine got a little hot and it warped to my advantage. 

I also need to work on the routing of my wires.

So what's keeping you from installing your Bulldog?

It is NOT But easily could be changed.   I don't remember how that front bearing holder on Lawsy's attached to the carriage itself.
Screws?

I don't see any reason why it wouldn't work.

Looks great installed! The move is going pretty good, all of my stuff is shipped and now we are stuck in an empty house with loaner furniture for until the first.

... I got an international move coming up in ~November.. will be taking an OrdBot in my checked luggage, and the others (including the SD) will be moving in the container 6-8 weeks later...

Yay for printers that you can break down to a flat pack

lol ya moves suck, in my spare time when and I have nothing to print I've found a pretty good looking Iron man model, that I've been dissecting and making it printable for a full suit. I'm about half way done with it so I should be done by the time I see my printer again :-)

As far as extruder steps/mm if you are at 1/16 steps it should be real close to 500 If I recall I ended up at like 498.  If you have a 1/32 than double that number.
I run a .60 nozzle but other than that this is what I ran with the .40

I have also found that the bulldog is so powerful that I can decrease my extrusion width for first layer to roughly half of the nozzle diameter.  Then run the nozzle for first layer virtually on the glass.  This leaves me with a first layer printed width of roughly double the nozzle diameter.  It is almost transparent and adhesion is near perfect every time.  I have the first layer height set the same as the layer height, not larger like it was from the factory.  In my case for .3 I use .2963

Then this is the start code I have had the most consistent results with.

G21; set mm units
G28 ;home all axis
G90; set absolute coordinates
G92 E0; reset extruder distance
M104 S245; set extruder temp and start heating
G1 Z5 F300 ;move platform down 5mm
G1 X193 Y187 F3000 ; move to back right corner
M109 S245; wait for extruder temp to be reached
G1 Z[first_layer_height] F200 ;move platform close to nozzle
G1 E7; extrude anchor
G1 F3000; center print head
G92 E0; reset extrusion distance