Taz 2 evolved to 4

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piercet
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Re: Taz 2 evolved to 4

Post by piercet » Sun Jun 29, 2014 12:39 am

the taz 4 fram top and bottom pieces sandwich both ends of the leadscrew. it's not a full on fixed / floating design, but it does improve the accuracy over threaded rod considerably. the rod is already exposed to heat somewhat, and the heating is going to be somewhat consistant, so for what it is doing on that axis, not having a fixed point bearing at the coupler end and a floating beairng at the other end isn't really going to have a negitive effect on operations. It would be pretty easy to modify that to a fixed floating setup if you had a ballscrew that has the threads for the retention nut, but it would really be overkill in this instance. I'd look at putting a full on Y rail on the chassis before I worried about altering the Z axis further. Though I might put a linear rail in there in place of the rod someday.

2con
Posts: 110
Joined: Sat Dec 07, 2013 11:35 pm

Re: Taz 2 evolved to 4

Post by 2con » Sun Jun 29, 2014 12:27 pm

What additional screws, nuts/washers, heat set gold things, etc.? will I need if I mostly re-use the ones n my TAZ 2 now?

UPDATE:
For the noobs out there, this is my list of stuff to buy off McMaster Carr<see below>. (my as well get high heat thread locker too)
Im buying stuff with future plans to add auto level and dual extruder. Lots can be bought at a local nut/bolt store but not all.

2con
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mcmaster car taz 2 to 4
Last edited by 2con on Tue Jul 08, 2014 4:54 pm, edited 3 times in total.
Taz 2 since crowdfunding 2013
-complete upgrade to Taz 6, swing-arm auto leveling, anti-z wobble installed, hardened steel rods with all linear bearings, vibration dampers, auto cleaning, hexagonal noz upgrade
To do:
-Cable carriers

unxetas
Posts: 38
Joined: Thu Jun 26, 2014 4:01 pm

Re: Taz 2 evolved to 4

Post by unxetas » Sun Jun 29, 2014 2:02 pm

piercet wrote:the taz 4 fram top and bottom pieces sandwich both ends of the leadscrew. it's not a full on fixed / floating design, but it does improve the accuracy over threaded rod considerably.
Thanks for your reply :) You're right, a fixed/floating ballscrew is a bit overkill.. Or rather, a ballscrew at all is a bit overkill! But I need to order a ballscrew for my lathe so the two extras for the TAZ only add about the same cost as one misumi leadscrew/acme nut!

I've also ordered a bunch of lm10uu bearings and will eventually replace the soft stainless rods with hardened steel ones. I got a really great deal on the TAZ3 so I figure it's worth spending a bit more money and attempting to improve a few things. I'm a bit spoiled by the Mini Kossel I had until a few days ago, the print quality on that little thing was just incredible, right out of the "box" (well.. after a week or two of putting it together, that is). I'm sure the TAZ is capable of great prints, but in the few experiments I've done so far, I've felt a bit disappointed. I'm sure a lot of it comes down to ABS vs PLA as well, or maybe I was just incredibly lucky hitting the perfect settings on the mini kossel right away.

2con
Posts: 110
Joined: Sat Dec 07, 2013 11:35 pm

Re: Taz 2 evolved to 4

Post by 2con » Sun Jun 29, 2014 11:56 pm

Theres something fun about upgrading the machine. I feel like I'm investing in a turbo except I make the turbines.
Ive had a bumpy road as well but all in all the machine is already pretty cheap for everything you get. Great bang for you buck and pretty resilient. Ive learned a lot and have lots to learn.
Taz 2 since crowdfunding 2013
-complete upgrade to Taz 6, swing-arm auto leveling, anti-z wobble installed, hardened steel rods with all linear bearings, vibration dampers, auto cleaning, hexagonal noz upgrade
To do:
-Cable carriers

2con
Posts: 110
Joined: Sat Dec 07, 2013 11:35 pm

Re: Taz 2 evolved to 4

Post by 2con » Tue Jul 08, 2014 10:37 am

Hi Guys,
Since i have a TAZ 2, the z-nut mount does not fit on my X-motor mount or X-Idler assembly. I will need to print the taz 4 motor mount and idler mount as well as get a 2 x end plate made up.

UPDATE:
x-motor mount:http://download.lulzbot.com/TAZ/4.0/pro ... tor_mount/
x idler mount:http://download.lulzbot.com/TAZ/4.0/pro ... s/x_ilder/
You must also get a machinist to make two x-end plates:http://download.lulzbot.com/TAZ/4.0/pro ... _plate.PDF


Is there anything I will have to change (or know) in my firmware regarding my evolution from taz 2 to 4?

2con
Last edited by 2con on Sat Jul 12, 2014 6:59 pm, edited 1 time in total.
Taz 2 since crowdfunding 2013
-complete upgrade to Taz 6, swing-arm auto leveling, anti-z wobble installed, hardened steel rods with all linear bearings, vibration dampers, auto cleaning, hexagonal noz upgrade
To do:
-Cable carriers

unxetas
Posts: 38
Joined: Thu Jun 26, 2014 4:01 pm

Re: Taz 2 evolved to 4

Post by unxetas » Sat Jul 12, 2014 9:12 am

Yup, just started printing some of these in preparation for converting my Taz 3 to ballscrews.. There are definitely quite a few more differences than it appeared initially :) like 2con said, the X motor mount and idlers need to be printed as well. I wonder if the X end plates could be printed too, but I'm sure there's a reason they made them out of aluminum, so I'll machine them as well. Gives me something to do in the many, many hours of printing ahead of me hehe..

unxetas
Posts: 38
Joined: Thu Jun 26, 2014 4:01 pm

Re: Taz 2 evolved to 4

Post by unxetas » Sat Jul 12, 2014 9:16 am

2con wrote: Is there anything I will have to change (or know) in my firmware regarding my evolution from taz 2 to 4?
So far, I think the only thing you might have to change is the Z steps per mm.. I believe the leadscrew has a larger pitch than the 6mm threaded rod! You might also be able to speed the Z axis a bit, but that's more of an optional thing :)

2con
Posts: 110
Joined: Sat Dec 07, 2013 11:35 pm

Re: Taz 2 evolved to 4

Post by 2con » Sat Jul 12, 2014 8:54 pm

Yea so all i need to do is modify the one setting in my current taz 2 firmware (z_axis_steps per minute) to the taz 4 number. Thats it!

From my understanding, eventually when i upgrade the heat bed to 24v, I will have to change more stuff.
I'm curious to know where you are placing these ballscrews!
Taz 2 since crowdfunding 2013
-complete upgrade to Taz 6, swing-arm auto leveling, anti-z wobble installed, hardened steel rods with all linear bearings, vibration dampers, auto cleaning, hexagonal noz upgrade
To do:
-Cable carriers

unxetas
Posts: 38
Joined: Thu Jun 26, 2014 4:01 pm

Re: Taz 2 evolved to 4

Post by unxetas » Sun Jul 13, 2014 10:38 am

I ordered the ballscrews from China from the same guy that made the ballscrews on my mill. They're relatively affordable and custom made to your dimensions. I paid just under $150 for 3 ballscrews and nuts (one for my lathe) and that included $38 for FedEx shipping - I got the custom made screws here about a week after ordering. I've now ordered 9 or 10 ballscrews from them, on 4 different orders and always got great service and parts made exactly the way I asked.

I asked for mine to match the Misumi leadscrews, so they're the same length, with the same shoulders machined for 608zz bearings, etc. They fit just the same as the Misumi leadscrews on the TAZ4. The ballnut is slightly different and larger than the ACME nut, but shouldn't be a big deal to mount anyway!

nopick
Posts: 991
Joined: Mon Sep 09, 2013 11:14 am

Re: Taz 2 evolved to 4

Post by nopick » Sun Jul 13, 2014 2:52 pm

Could someone from Lulzbot comment on the X end plates? Do they have to be machined?

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