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

U - mold. . Pics coming

Just some U-Mold or Polymorph (depending on US - RestOfWorld) . Its a low-melt point polypropelene awesome for quick molding jobs. It will only do 50°C before softening, but, it works even with an enclosure due to the fan. Lasted me since I did the hack install day I got the Bulldog... RadioShack/Jaycar/Maplins

Just make sure to push the E3D 'upwards' so its flush against the base of the stepper mounts.. then mould it in. I used a hot knife to trim it back to the top of the fan bracket because I did.. not neccesary though.
Dont over do it so it wont fit into the bracket - a few pellets go a long way. I suggest moulding it in then pushing it into the bracket to ensure its physically formed as needed. Once cooled, I can remove the insert to allow me to swap heatsinks on the E3D...

Tinfoil, or a washer of appropriate thickness cut into 1/3rds and 2 pieces inserted under the top collar would also work.

I just used a small piece of stainless safety tie wire the appropriate thickness and shaped it into a U.  Any solid wire the correct thickness would work.  Not as cool as U-mold but much quicker and available.  Much easier than washers also.

Are you using the SD carriage or Lawsy's with bearings?

When you get it up and printing could you let me know if you notice the extra mass?
I needed to slow my prints down a bit because I have more movement than before.  I am guessing the extra play is in the SD carriage bushing and I just didn't notice it as much before.  It is probably just time for me to order up some bearings and install Lawsy's carriage.

NM, reversed the wires. Got it!

I had to spend some time adjusting the spring tension for the filament.   I had a very similar problem to the one in your picture and that's what it was.  I can't see the set screws in your photo but mine stick out about 2mm or so.  In the beginning I had them to tight.
Unrelated how do I get my pics to just show up?  instead of as a link?

I took mine out some.

gears have more mass to accelerate and decelerate, so I actually dropped my max velocity and max feedrates marginally as well... and yes, you may want to tune your vref by setting RH to extrude 100-200mm's at around 20mm/s and thenadjusting the vref up or down as required to get a very smooth drive gear motion. If you wanted to be fiddling with a DMM and all, then the value on a A4988 would be 0.320 V, on a DRV8825 from Pololu its 0.400, and on a DRV8825 from Kimet (CoolDrv V2) its 0.200 . This sets it to .8amp, which is just shy of the 1.0amp max for the stepper.

I had to adjust mine and interestingly enough I also had to adjust my X axis also.  For some reason as soon as I plugged in the Bulldog and did a quick test of every movement the X began to groan.  Just turned it down a tiny bit and all was good.
I didn't adjust mine with a meter just by sound and everything is running smoothly.

@Stevos758

Connection of stepper motor is wrong and motor have no power . You need to exchange place for red and brown wire.