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Re: Adding an Openbuilds Openrail Y axis to a Taz 3/4/5

Posted: Fri Jun 10, 2016 9:29 am
by Sebastian
skinbo wrote:Thanks. I see you recommend printing 2 of the guides. How do you ensure the drill holes are perfectly aligned along the y-axis? For instance, how to ensure alignment of the left hole of the top guide and the left hole of the bottom guide.
That alignment isn't important. The important thing is to keep the left and right hole inside the tolerances.
BTW the drill templates worked very well for me when I did the conversion 8-)

Re: Adding an Openbuilds Openrail Y axis to a Taz 3/4/5

Posted: Fri Jun 10, 2016 10:09 am
by piercet
skinbo wrote:Thanks. I see you recommend printing 2 of the guides. How do you ensure the drill holes are perfectly aligned along the y-axis? For instance, how to ensure alignment of the left hole of the top guide and the left hole of the bottom guide.
First i set the guides on top of eachother to make sure they printed dimensionally equil. Assuming I have 2 that are good and accurate, I place them on the bed, center them as best I can by eye, then loosely tighten 4 of the 8 possible M3 bolts (2 per side) so I can still see the mounting holes. I then use a T square to line up the two guides on their short edges. The only dimension that is important is the X direction allignment. You can have the drill guides as close or as far apart as you need on the Y direction. I usually push them as far apart as they will go just because the extra bit of distance makes for a theoretically slightly more stable platform. Once it's alligned there, I tighten the M3 bolts down, add the others for good measure, and move to the drill press.

Re: Adding an Openbuilds Openrail Y axis to a Taz 3/4/5

Posted: Tue Jun 14, 2016 3:45 am
by marth123
Hi

I just wonder how you guys manage to screw the top part of the v rail as the hole is too small and not threaded? Please see the pic I just compare the size of M5 bolt to the hole.

This is the rail I bought

http://openbuildspartstore.com/v-slot-linear-rail/

Re: Adding an Openbuilds Openrail Y axis to a Taz 3/4/5

Posted: Tue Jun 14, 2016 7:57 am
by piercet
Well, for starters thats the wrong rail. You need the 40mm wide ones for the Y axis. But you will also need an M5 tap to thread that hole.

Re: Adding an Openbuilds Openrail Y axis to a Taz 3/4/5

Posted: Tue Jun 14, 2016 9:39 am
by marth123
I see, so we need to manually tap those. What kind of tap do you recommend for this application?

straight one
http://www.ebay.com/itm/2x-High-Speed-S ... fuYH4t-Ryg

or spiral one
http://www.ebay.com/itm/M3-M4-M5-M6-M8- ... 1QKBAXiqCg

actually there are 4 of 40mm and 2 of 60mm v rial in the pic for your X and Y project, I bought some spare just in case something mess up.

Re: Adding an Openbuilds Openrail Y axis to a Taz 3/4/5

Posted: Tue Jun 14, 2016 9:53 am
by piercet
Aha, that makes sense. I used a straingt M5 open tap for mine. The spiral ones should be fine too.

Re: Adding an Openbuilds Openrail Y axis to a Taz 3/4/5

Posted: Fri Jul 01, 2016 11:23 pm
by piercet
Printing the parts for the Y axis instruction guide, which will be layed out similar to the X axis one. Aside from the new Y axis belt tensioner and the Y maximum endstop piece, anyone have anything in particular they would like addressed on the Y axis? Also anything you would like to see different from the X axis document? please let me know.

Re: Adding an Openbuilds Openrail Y axis to a Taz 3/4/5

Posted: Sat Jul 02, 2016 9:50 am
by Rp1030
hmm.. Did you make a new Y belt tensioner? I am about to adjust the tension on my Y belt, for it rattles when moving toward the home position. But if you have a new belt tensioner, I would love to print it!

Re: Adding an Openbuilds Openrail Y axis to a Taz 3/4/5

Posted: Sat Jul 02, 2016 2:53 pm
by piercet
Rp1030 wrote:hmm.. Did you make a new Y belt tensioner? I am about to adjust the tension on my Y belt, for it rattles when moving toward the home position. But if you have a new belt tensioner, I would love to print it!
Yes. It's still in Alpha testing. i haven't even printed all the pieces yet, but here is what it's going to look like, and the parts. Basically this will require another hole in the Y Idler Endplate, a new bolt and nut, and 4 newspacer thingies. Optionally it will also have a mount for a Y maximum endstop and a replacement belt mount with the Y Maximum Endstop Target. The theory is that the new bolt goes through the Y Idler end plate in the new hole, and into the new Nut in the idler block. Turning the bolt tightens or loosens the idler. The idler is prevented from rotating by the 4 spacer thingies. I've used a similar design to this on my slightly modified AO-10x for years and it works great. This also slightly shortens the belt path, which always improves accuracy (less belt, less potential belt give.)

There will be a thread with pictures and part lists and whatnot as soon as I go get the parts and verify that everything fits. I wouldn't reccommend printing this one yet unless you want to help me test it, as it is not a tested product yet.
tensioner1.png
tensioner2.png
tensioner 3.png

Re: Adding an Openbuilds Openrail Y axis to a Taz 3/4/5

Posted: Sun Jul 03, 2016 3:59 pm
by piercet
Taz 6 style corner pieces. You will need the flexy foot and heat set inserts to use them. They can also be used on a Taz 3-5. the bed allignment for that piece is largely unchanged.
taz6 foot.png
1 more motor mount and 3 more cable chain anchor tiny parts to print, a pile of heat set inserts to install, and then I can start the assembly photoshoot finally.