New Linear Z - Rev 2 - Now updated for easy tram adjustment

Expert parts !. Nice work !.

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Watching your progress, great work, please be encouraged and keep us up to date, thanks for sharing.

This is exciting. My stab at designing a 611 holder, front mounted, easy to tram. This file is just part of it. I will cut two of these and mount to plate that mounts to Lukes z plate

Stay tuned!


An easy to adjust mount is something I’d be interested in even though I don’t plan (at least at this time) an wholesale replacement of the Z-axis.

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Phil, this whole thing is in a constant state of flux. Check with @Luke, he has a killer idea that uses the stock mount but makes it adjustable. I’m pretty sure it can be used with the stock steel Z axis plate. Just need to drill a few holes in it.

Evening all - as an update to this I’ve addressed the front tram issue. The shapeoko has a great way of dealing with tram but it’s not actually called tram in this instance - it’s track tension. So what happens when you pull their track tension method and apply it to a different design?

See attached picture. I have made a rear mounted spindle plate - this fixes to 4 M5 mounting screws on the carriage plate. Now there are 2 ways you can tackle it - lob 4 screws in and adjust as you see fit - really boring and a pain in the ass. The other way is to put 2 screws with eccentric nuts in the top 2 holes. Now this won’t work if they are round as they would pull in opposite directions. However by extending the holes to be elongated this allows the mount to move a couple of ml in either direction.

You can now raise or lower either side which will allow you tram left and right.

You can then fit the other 2 screws in the bottom holes and tighten locking it in situ - then tighten the first two fully if required. Forward/backward tram would still have to be done with shims.

This will work on any shapeoko…


Hey all, Luke’s design has been a real inspiration and challenge for me. I’ve never done a project as complex as this in metal, not even close. I’m far from finished but I’ve learned so much. I’m now cutting the Base plate he designed. I’m using adaptive clearing in F360 cam per his suggestion. 1mm doc, 400 mm/min. Thanks to CM I was able to start this 1mm doc job slow and ramp up the speed in 10% increments.

So, the message I guess is for any other metal cutting noobs out there, jump in, you’ll be amazed at the capability our little “hobby” machines have.

Other parts I’ve cut for the project…


Nice quad , you do in your Shapeoko ?.

Yes I did. I’m working on some more ambitious designs but, too many hobbies :smiley:.


Whilst I’m waiting for parts I started my aluminium milling. I only have 6mm currently though.

It’s a great day when you mill clean through but don’t hit the tape…


Hmmm, I seem to have left out some counter bores :roll_eyes:. Easy to fix, thanks for posting.

Thats my fault - I didn’t include them - I go my motor spacer today and realised they would sit ontop the screws - originally I was using rod spacers… I forgot to adjust the design when I sent it over…

What rpm do you use with 6mm bits? 13,700 ‘ish seems the sweet spot for my S3. Anything lower and I get resonance/chatter. That’s at 360 mm/min, 1mm DOC.

I run all at 9700 rpm but I use smaller faster passes

I did 6mm at 1000mm a min. 0.4mm doc

More parts came today and I did a respray of my spacers…

Worth noting don’t you need 65mm screws and don’t use button head.

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When you guys machine aluminum, are your cut edges 90-degrees to the faces or a little off?

A little off at a time - 0.2mm doc through the piece. If I have the item in a vice I can mill through it leaving 0.3mm then save 0.1mm off per side at a time.

Luke, you’ve inspired me to continue to up my game

Lookit here, all done and missed the tape!


That’s looking great! When are those rails coming?

Continuing to progress.

I tacked the 611 mount on to see how it’s range of motion compared to stock.

Both Z’s are at their lowest point. My preference would be to match the stock -Z without having to drop the 611 all the way down in its mount. Is there an engineering consideration that would prevent dropping the 611 mount plate on the new Z another 30-40 mm?

BTW, the hole pattern on the rails I received is 30 mm from the end then 60mm between hole centers, 5 holes total.