Threaded Z rod on twin towers January 06, 2015 12:23PM |
Registered: 10 years ago Posts: 327 |
Re: Threaded Z rod on twin towers January 06, 2015 01:25PM |
Registered: 10 years ago Posts: 2,472 |
Re: Threaded Z rod on twin towers January 06, 2015 02:04PM |
Registered: 10 years ago Posts: 14,672 |
Re: Threaded Z rod on twin towers January 06, 2015 04:01PM |
Registered: 10 years ago Posts: 327 |
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dmould
I assume you will be fitting 2 Z drives, one on each tower? My choice would be to keep the screw drive method, and fit a second stepper motor & screw jack to the other tower, connected in series. A tell-tale pointer at the top of each screw jack is used to check that they start off at the same relative height when power is first applied. An alternative would be to connect the two screw jacks with a belt and have 1 stepper motor (that way they cannot get out of step once adjusted).
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dmould
Changing to a belt drive would introduce several challenges. One is how much gearing the stepper will need to have enough power to raise the X arm and how to arrange that gearing, another is how to prevent the X arm crashing to the bed under gravity when the stepper drive current is removed, and another is how to stop the stepper driving the nozzle into the bed if it is driven below the Z=0 height (which it inevitably will be some day).
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dmould
I was thinking about doing a similar mod, but have decided that it would be easier to use the experience gained in building & using the Ormerod kit to build a different design from scratch - I'd like to try a design that has no hanging arms, does not have a Bowden extruder and has controllable filament cooling. I am however waiting to see whether the performance limitations of the Bowden extruder might be adequately overcome in software before finally deciding on a design, because mechanically the Bowden extruder is superior. I'll chose a proven design but maybe add a few modifications of my own. A larger print volume than most designs accommodate would be useful, for example, and I'd like to have the print area fully enclosed so the environment is controlled. I have yet to decide whether to use a design that has a fixed extruder and the bed moving in at least both X and Y. Such designs have the advantage of being able to accommodate large multi-headed nozzles far more easily than designs that have moving nozzles. I will preferably use the Duet board as I am happy & familiar with it. One thing to bear in mind is that if the Ormerod is the only printer you have, you will not be able to print parts that you may find you need to change after you start modifying the printer.
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dmould
IOne thing to bear in mind is that if the Ormerod is the only printer you have, you will not be able to print parts that you may find you need to change after you start modifying the printer.
Re: Threaded Z rod on twin towers January 07, 2015 08:30AM |
Registered: 10 years ago Posts: 2,472 |
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dc42
Dave, have you considered building a delta, or a CoreXY machine?
Re: Threaded Z rod on twin towers January 07, 2015 10:17AM |
Registered: 10 years ago Posts: 14,672 |
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dmould
I have now pretty much decided that I want a machine that has the whole build plate moving in X, Y and Z so as to have the extrusion nozzle(s) fixed to a non-moving support structure.
Re: Threaded Z rod on twin towers January 07, 2015 10:45AM |
Registered: 9 years ago Posts: 32 |
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dmould
Just like my succession of quadcopters, designing and making the machine will be a hobby in its own right rather than just a means to an end, so farming out lots of the fabrication will defeat the purpose. (I probably happily spend at least an hour designing and building a quadcopter for every minute I spend flying it).
Re: Threaded Z rod on twin towers January 07, 2015 11:51AM |
Registered: 10 years ago Posts: 2,472 |
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Vizual54
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dmould
Just like my succession of quadcopters, designing and making the machine will be a hobby in its own right rather than just a means to an end, so farming out lots of the fabrication will defeat the purpose. (I probably happily spend at least an hour designing and building a quadcopter for every minute I spend flying it).
Another multicopter builder/flyer! That's nice. Have you printed anything for the copters? One of the reasons I bought a 3d printer was to be able to print parts for my multicopter builds. Would also be fun to create entirely printed copter.
Sorry for the OT.
Re: Threaded Z rod on twin towers January 07, 2015 12:29PM |
Registered: 10 years ago Posts: 2,472 |
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dc42
Quote
dmould
I have now pretty much decided that I want a machine that has the whole build plate moving in X, Y and Z so as to have the extrusion nozzle(s) fixed to a non-moving support structure.
How about a Stewart platform then?
Re: Threaded Z rod on twin towers January 07, 2015 02:41PM |
Registered: 10 years ago Posts: 14,672 |
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dmould
I had to look that up - good grief no!
Re: Threaded Z rod on twin towers January 07, 2015 04:30PM |
Registered: 10 years ago Posts: 14,672 |
Re: Threaded Z rod on twin towers January 08, 2015 08:52AM |
Registered: 10 years ago Posts: 2,472 |
Re: Threaded Z rod on twin towers February 08, 2015 05:04AM |
Registered: 10 years ago Posts: 327 |
Re: Threaded Z rod on twin towers February 08, 2015 04:57PM |
Registered: 9 years ago Posts: 102 |
Quote
dc42
Dave, have you considered building a delta, or a CoreXY machine?
Re: Threaded Z rod on twin towers February 08, 2015 05:36PM |
Registered: 10 years ago Posts: 14,672 |
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tstone
How does a delta compare concering print quality and speed to the ormerod?
Re: Threaded Z rod on twin towers February 09, 2015 04:24AM |
Registered: 9 years ago Posts: 1,159 |
Re: Threaded Z rod on twin towers February 09, 2015 08:36AM |
Registered: 10 years ago Posts: 14,672 |
Re: Threaded Z rod on twin towers February 09, 2015 01:53PM |
Registered: 10 years ago Posts: 2,472 |