The purpose of the tape is not only to hold the pin in place, but to fill that clearance fit in a compliant fashion. A few wraps of tape result in a snug fit, like so:

I actually had to lightly tap the socket on for it to bottom out, and it is so snug from the 2-3 wraps of tape that there is no play/looseness by hand (there is still tolerance for a couple degrees of misalignment, but you can't feel this by hand). That is proper installation.

laird wrote:

elmoret wrote:

You shouldn't keep crushing them - its not meant to be a wear part! I have run 500 hours on a washer before. Make sure it is at least 1.3mm thick.

If it holds for a few hours, it should be good for hundreds.

Yeah, sorry, I'm just cranky. I'm sure that once I get it working again, I'll be my usual optimistic self. :-)

No you're fine - its my fault, and it should work the first time out of the box. I think that the tape wrap will solve it, as this takes up about 400 microns of clearance. Let me know how it goes.

Posted in another thread, but to close the loop here...

I got it working by going back to the original motor and using two #6 washers, hammered into place (with a screwdriver holding them in place during the hammering). I couldn't hold two stacked up with tape as the collar pushed the tape (and thus the washers) down. One washer did nothing other than turn 'round'.

I'm having no luck with the new motor. I will try to grind down the axle to get more 'flat' to transmit torque with, and jam in washers.

Now that I have filament extruding, well, at least I know that it can extrude, and the nozzle is clear, etc.. So feeling much better about the world of Filastruding.

elmoret wrote:

You shouldn't keep crushing them - its not meant to be a wear part! I have run 500 hours on a washer before. Make sure it is at least 1.3mm thick.

If it holds for a few hours, it should be good for hundreds.

Yeah, sorry, I'm just cranky. I'm sure that once I get it working again, I'll be my usual optimistic self. :-)

No you're fine - its my fault, and it should work the first time out of the box. I think that the tape wrap will solve it, as this takes up about 400 microns of clearance. Let me know how it goes.

You shouldn't keep crushing them - its not meant to be a wear part! I have run 500 hours on a washer before. Make sure it is at least 1.3mm thick.

If it holds for a few hours, it should be good for hundreds.

Yeah, sorry, I'm just cranky. I'm sure that once I get it working again, I'll be my usual optimistic self. :-)

If it holds for a few hours, it should be good for hundreds.

laird wrote:

digitydogs wrote:

Got impatient and came up with another interesting solution to the issue until my dowel pins arrive....
Gator grip and square key from local hardware store.

So, how did it work? Did the gator grip hold onto the motor axel well?

That assembly is too long to fit within your enclosure.

Yeah, I went and measured a gator grip, and it's HUGE. There's only 3/4 of an inch between the end of the motor axle and the end of the feed screw. So tonight I'll be buying washers and taping them to the old (slower) motor axle to see if I can get that to work, even if it's not as cool/fast as the new motor. Washers are cheap, so if I have to keep crushing and replacing them, it's cheap, and at least Ill be extruding.

digitydogs wrote:

Got impatient and came up with another interesting solution to the issue until my dowel pins arrive....
Gator grip and square key from local hardware store.

So, how did it work? Did the gator grip hold onto the motor axel well?

That assembly is too long to fit within your enclosure.

Got impatient and came up with another interesting solution to the issue until my dowel pins arrive....
Gator grip and square key from local hardware store.

So, how did it work? Did the gator grip hold onto the motor axel well?

I got the nozzle off, cleared out a chunk of back/burnt gunk, the rest looked soft so I left it. I poked a 1.5 mm hex key into the nozzle while it was hot, and it went in a good half inch, so I think that's clear.