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Hey! This thing is still a Work in Progress. Files, instructions, and other stuff might change!

Highly accessible vertXtruder for OB1.4

by Wired1, published

Highly accessible vertXtruder for OB1.4 by Wired1 Feb 12, 2013

Description

Inspired greatly by ocularb0b's vertXtruder I am attempting to build one for the OB1.4 printer using my compact extruder and my original OB1.4 X-carriage all squashed together.

This is highly experimental at this stage :)
Uses the standard gear set for my other extruder, included here for convenience.

Recent Comments

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Yes I found the x-axis travel considerably shortened as well because of the motor position on the x-carriage. The original bowden tube carriage slipped in behind the printer frame to get the full width and the motor now fills that space. Another option would be to put the motor out the front where there are less obstacles. Next printer I build will have no upper frame :)

With this extruder on the OB1.4 I need to move the gantry for the X-carriage towards the back of the printer to be able to cover the full print area. I think the nozzle is a bit forward of the original Bowden type setup for the OB14. It should just mean shortening the diagonal struts slightly to move it back about 15- 20mm. I am going to change it on my printer this weekend.

I attached a peg to the left/motor end of the extruder with some acetone to trip the X limit switch and also reduced the size of the X-limit switch mount about about 33%. Without these changes either the extruder or the limit switch holder will jam up against the brackets and bolts for the diagonal brace, but it could just be the way I mounted the limit switch?

Well it is still work in progress so a good result :) I am working on another version that moves the motor back and looking at your photo I can see how far I need to go thanks.

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Instructions

There is currently some problems with this so hold off printing it out just yet :)

Print it out and hope.
Remove the support material.
Put it all together if you can.

Still unproven **very experimental** design but knock yourself out.

Comments

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jcaywood on Mar 15, 2013 said:

With this extruder on the OB1.4 I need to move the gantry for the X-carriage towards the back of the printer to be able to cover the full print area. I think the nozzle is a bit forward of the original Bowden type setup for the OB14. It should just mean shortening the diagonal struts slightly to move it back about 15- 20mm. I am going to change it on my printer this weekend.

I attached a peg to the left/motor end of the extruder with some acetone to trip the X limit switch and also reduced the size of the X-limit switch mount about about 33%. Without these changes either the extruder or the limit switch holder will jam up against the brackets and bolts for the diagonal brace, but it could just be the way I mounted the limit switch?

Wired1 on Mar 15, 2013 said:

Yes I found the x-axis travel considerably shortened as well because of the motor position on the x-carriage. The original bowden tube carriage slipped in behind the printer frame to get the full width and the motor now fills that space. Another option would be to put the motor out the front where there are less obstacles. Next printer I build will have no upper frame :)

jcaywood on Feb 26, 2013 said:

Hey there, I just got this all put together on my OB1.4 and tested it last night and it works fine with some minor adjustments. The Y carriage belt runs fine throughout everything. The extruder motor doesn't fit between the upper and lower bearing blocks so I spaced it away a bit with some washers.

Wired1 on Feb 26, 2013 said:

Great news, did you mean the X-axis belt? I can add some material to space the motor further away. Can you add a photo? I am also thinking of adding a heat shield between the hot end and the carriage.

jcaywood on Feb 22, 2013 said:

I like the idea of this design over the bowden design (just personal pref) so even though it's experimental I printed one out last night to get an in person look at it. The motor mounting block extends into the opening of the bearing blocks just a bit, causing a flat spot resulting in poor seating of the linear bearings. To be clear I'm not referring to the bearing stops themselves. I ground the high spots out and linear bearings seem to fit fine and ride on the X rods fine now. The hole for the filament does not go all the way through the body so I drilled that out. Thanks for your work on this and the OB1.4 printer design, I've really enjoyed building it so far.

Wired1 on Feb 22, 2013 said:

Yes I'm not a fan of the bowden tube now that I've made one, too many bits to go wrong plus the problems with lag in the tube for retration etc. The filament hole was there in the design but Netfab deleted it for me - there is enough of a starter hole to drill it out I figured. I'll have a look at the motor mount intruding into the bearing holders thanks for that. Did you print it in PLA or ABS? I don't have a lot of luck with ABS but with the J-head up inside it the temperature might damage it otherwise. The alternative would be to make an alloy plate for the J-head and secure it to the underside somehow, might look into that.

Wired1 on Feb 17, 2013 said:

New version looks like it might work - does away with the j-head clamp and takes the j-head into the bottom. This design will limit your z-height and should be printed in ABS as the j-head is secured in the carriage body.

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