LowRider v4 CNC - KINEMATIC Tool-less Quick-Change Accessory Holder - supports laser, drag knife, pen, etc (v5.0)

LowRider CNC Hardware Development
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OK, as requested by @azab2c (and perhaps others, I cannot recall for sure) —

I got a new “Main Mount” designed, printed, and installed on my LowRider v4, that allows my Kinematic Accessory Tool holder from before, to be attached and used with LR4!

The following is copied and pasted from the Description:

This allows use of my earlier kinematic accessory tool mount on the awesome new LowRider v4 CNC.

Here’s an old-yet-helpful video I made about the earlier version (which was for LowRider v3):

This whole deal is an adaptation of a Maxwell Kinematic coupling. You can read about that here: Kinematic coupling - Wikipedia

Original motivation was a nudge from Jamie K on the V1 Engineering forum.

Speaking of which, Jamie has now remixed this in a way that requires no acorn nuts, no screws for troughs, only one magnet on one side, no need for drilling any magnets for additional countersinking, and no need for prying any magnets out for flipping them. Check out his remix here. His remix avoids acorn nuts and avoids troughs made from screws, all by having both “mounds” and “valleys” made from 3D printed plastic. Here’s a photo of Jamie’s remix:

800×600 339 KB

What’s new?

The previous version was designed for LowRider v3. This new “Main Mount” enables use on LR4. Since the only part that needed modified was the “Part A, Main Mount,” only the new version of that part is provided here. For the other parts, you can download and use those from either…

… Jamie’s excellent remix that requires less hardware:

…or my earlier listing:

Also, this is backwards compatible, so if you already made a set for your LR3, you can use all of it except the main mount, on an LR4.

Caveat:

  • Depending on the size and shape of whatever tool you attach, you should double check your range of X axis travel, as your tool’s shape may result in a reduction of X axis travel, in order to avoid a collision at the X max side.

Notes:

  • Two versions this new “Main Mount” are now offered here in this listing:
    • On one, I designed a narrow slot that is intended to allow a Tiny Touch Plate (from Ryan’s store) to be stored in the holder clip that he designed on the upper tool mount. If this prints well, and works, great. If not, then my own touch plate (which is wider than Ryan’s) does indeed store well in the upper mount clip, as it then “leans” its edge against the lower tool mount, out in front of it.
    • That said, a version without that slot is also offered, and is probably easier to print. This second version is courtesy of fellow V1 maker Aza ( @AzaB2C — on V1 forum here, and on Printables here ). Kudos and thanks, Aza!
  • I changed the previous targeted angle of the mounted “Fixed Base” part from this:

… to this new angle for LR4:

…which, when attached to the main mount, looks something like this:

…where the LR4 core would be just to the right of this side view. The reason for this change was to minimize the offset distance away from the gantry, in order to help strengthen the mount’s rigidity.

Speaking of which, this mount does seem more rigid than the previous version, owing in part (I think) to the fact that it’s attached at three points instead of two in the previous version. The three points of attachment to the existing LR4 core’s tool mounts are revealed in the simple directions for…

Assembly and Installation

  • Print all parts and install all magnets / washers as desired. See links below.
  • Using M3 x 16mm screws and M3 nuts, attach your desired tool holder(s) to one or more “Mobile Base” part(s). There are capture slots for the nuts.
  • Using M3 x 16mm screws and M3 nuts, attach the “Fixed Base” part to the “Main Mount.” There are capture slots for the nuts.
  • To install the combined assembly of Fixed Base and Main Mount to the LR4 core:
    • On the top and bottom tool mounts, on the right side of each, remove the two M5 x 30 mm screws,
    • Place the “Main Mount” part in position. (Mine snapped in with an audible click.)
    • Replace the two original screws with M5 x 45 mm screws. (That makes two of the three points of attachment.)
    • Install an M5 x 30 mm screw vertically down through the spare auxiliary mount hole on right side of the bottom tool mount. Use an M5 nut on the underside. There is no capture slot for this. (That makes the third point of attachment.)
  • Magnetically click a “Mobile Base” toolholder onto the “Fixed Base.”
  • Done!

Hardware / BOM:

  • Filament of your choice (I’m using PLA)
  • These disk magnets: Amazon.com
  • Two M5 x 45 mm screws (from my stash but like these): Amazon.com
  • 12 or more M3 x 16mm screws & nuts from this assortment: Amazon.com
  • Some washers that are about 1.25" in diameter. Be sure to get steel washers that are subject to magnetic attraction. (Not all are! I think if it says “galvanized” then it is.)

If you are using my earlier design parts that require more hardware,

COMPATIBLE TOOL HOLDERS:

Printing tips

  • Print as oriented.
  • Suggested layer height with a 0.4mm nozzle: 0.28mm — I tried printing with a thinner layer height, but then the bridging (over the slot for the Tiny Touch Plate) did not do as well.
  • Supports are encouraged. I regret this, but because of the slot intended to accommodate the Tiny Touch Plate, the design is complicated just enough that supports seem called for. I switched on Tree Supports, checked the preview, and added some support blockers to reign in the madness. See pics below. The one support blocker shown in the lower left forced bridging over the slot, as opposed to having a tiny slot full of support material.

A full “clock face” of nut capture slots on back:

Backwards compatible - my old parts shown attached here:

Change log:

  • October 24, 2024 — initial release posted. Consider this as “in beta.”

My PayPal tip jar: https://paypal.me/design8studio

Various LowRider 3 CNC remixes:

View all my models and remixes on Printables:

*Amazon product links are affiliate links.

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NOTE: Just posted a minor revision.

Change log:

  • October 24, 2024, ~8:30pm — Re-uploaded because a tool access notch was on the wrong face. Corrected it. The notch allows screw to be inserted in the lower tool mount’s tensioner adjustment screw hole. The corrected notch is shown here:

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Fantastic! Something I can reuse from my lr3! (Pen and drag knife, looks like I no longer need my bizarro z probe holder.)

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:heart_eyes:, very cool, very comprehensive! Thank you @DougJoseph! Hoping to finish printing and try out today. Will be trying the mister mount(s).

Noticed Cura (5.6) whinges about missing/extraneous surfaces :man_shrugging:. Cura shares a link to
https://support.ultimaker.com/s/article/1633018228456, but still slices fine from what I can see. So, I’m ignoring and printing anyway. Thought the message is worth mentioning…

image
image1038×755 135 KB

Made small edit to close the probe slot so I can avoid needing support, and help add a bit more material to that area. Thinking my V1E probe is small enough to fit in the top router mount so this bottom section can be blocked off.

Thanks again for this mod!

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That‘s one of the mods I‘d really like to add some day, I’d remove the slot as well. :smiley:

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@azab2c
Awesome, thank you! If you get a chance to post that as a remix that would be great. Or I could offer it. I seriously considered not having the slot. The normal position of the Tiny Touch Plate and the space that this mod seems to need to occupy, really do collide a bit, and supporting the touch plate with the slot made it a rather challenging print.

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I ran the model through the “solid checker” in my modeling program, which can miss things, and if I remember right, when I first opened it in OrcaSlicer it said not manifold, but OrcaSlicer has a Windows only feature to repair, and I did, and it seemed fine. So, I’m not sure what’s going on here with Cura.

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Thank you Doug! The Kobalt compatible base mount anchored at three points is neat. Seems really sturdy to me.

20241026_225858
20241026_2258581920×3950 471 KB

Thinking of remixing the remixes so Part C (Jamie valley) and Mister adapter (Doug/Jonathan’s) are merged into a single part that brings the Mister (Jonathan reco) in closer to the router/spindle. Main reason being to reclaim some of the usable X we lose.
Maybe move mister bit higher, there’s a lot of tube, will see if segments can be removed. Bonus will be shedding some hardware, and minor amount of weight, current setup is 400g.

Need to figure out how to integrate Vac shoe, for now will just drill a small hole to insert mister, and call it done.

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Looking good! Re. Remixing- sounds like a plan!

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I used the v2B mount and mounted the Mister on the router side of the mount, and there is no loss of X travel…

b2fffa7858aa9620ef8ecaddf7dab21c4d08f070_2_666x500

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Part of the reason why the new LR4 version is able to gain some extra millimeters of travel distance in the X is because of ruthless efficiency. That efficiency means that almost any tool of any thickness being added into the mix is going to result in some loss of X travel (on max side). For instance, even just me adding on the pen holder that I used on my LR3 now results in a loss of X travel by some few millimeters. I might be able to redesign it to a thinner profile to prevent that from happening. The approach that you showed above might be doable with a remix. I don’t remember the specifics on it. For any tool to come out to the left side, it would have to be sprouting from above or below where the mount attaches.

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Oh yeah, LR4 vs LR3. My bad, carry on…

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I was getting ready to print this (Thank you Doug!) but was wondering if anyone has remixed it to remove the slot? If not, were those edits just made on the STL, or is a more editable version available?

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I did remix it, but I just looked and apparently forgot to actually post the remix. I will get it uploaded. It may be this afternoon or tonight before I can get to it.

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Fwiw ended up printing this less slotty minor remix of Doug’s mount than kinda remixes Jamie and Jonathan’s remix of Doug’s O.G Kinematic mount

lowrider4/mods/kinematic-mount/lr4-kinematic-mount-aza.stl

Ended up not using for misting/cooling, but will be using for the other attachment adapters.

@ someone, consider additional remixing to include center hole to mount magnet. Consider hole sized for tapered M3 bolts and recessed captured nut.

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Thanks, @azab2c !

I hope it’s OK: instead of me re-outputting an edit that would merely be identical, I just added yours to the Printables listing, and credited you with kudos.

Link again: LowRider v4 CNC - KINEMATIC Tool-less Quick-Change Accessory Holder - supports laser, drag knife, pen, etc (v5.0) by Doug Joseph (design8studio) | Download free STL model | Printables.com

Here’s how the edited description reads on that part:

Notes:

  • Two versions this new “Main Mount” are now offered here in this listing:
    • On one, I designed a narrow slot that is intended to allow a Tiny Touch Plate (from Ryan’s store) to be stored in the holder clip that he designed on the upper tool mount. If this prints well, and works, great. If not, then my own touch plate (which is wider than Ryan’s) does indeed store well in the upper mount clip, as it then “leans” its edge against the lower tool mount, out in front of it.
    • That said, a version without that slot is also offered, and is probably easier to print. This second version is courtesy of fellow V1 maker Aza ( @AzaB2C — on V1 forum here, and on Printables here ). Kudos and thanks, Aza!
1 Like
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@dgkeith237

In case you missed the post above, a version without that slot has been included in the listing:

Link again: LowRider v4 CNC - KINEMATIC Tool-less Quick-Change Accessory Holder - supports laser, drag knife, pen, etc (v5.0) by Doug Joseph (design8studio) | Download free STL model | Printables.com

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Thank you!

My printer began overheating the raspberry pi for some reason, which meant I should fix the camera cable that was too short, which led to me thinking I should go ahead and take the chance to add KlipperScreen, which logically meant I should tear it down completely and add IDEX.

So it may be a few days before I can print it :sunglasses::crossed_fingers::man_facepalming:.

Once in a while I have a project where the scope expands to the point it’s ludicrous. :grinning:

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