Hat tip to Ryan for all the amazing engineering he’s done, especially on the LR2. And Ryan, I love the fact you have the shop and offer the printed parts kit. I don’t have a 3D printer but the way you package and bundle things makes it an easy ordering decision once I learn a few more details.
I’ve been following the forum for a month or so and finally joined to ask some questions:
(Note to Ryan: I suspect this was intended but I can not read Lowrider here without hearing “Low-ride-er” in that voice in my head. Nice one)
I purchased a MaslowCNC about a year ago, but life and a move intervened and I haven’t had a chance to build it. One of the big appeals of the Maslow is that it runs vertically (well at a 12 - 15 degree tilt off vertical) so it can operate in a fairly small footprint volumetrically. I think its about three feet of footprint. Alas, due to the chain driven nature, the current iteration has accuracy and repeatability issues in the edges and top center of the sheet. But it got me wondering, could a modified Lowrider run on an easel type “table”?
I found this the other easel/vertical CNC the other night when googling around: https://buildyourcnc.com/item/cnc-machine-greenLean-v1 and it looks like they have a V2 version of it, V1 and V2 photos attached.
If the LR2 was modified so the skate wheels were enclosed in a track of some sort, would it work vertically or would gravity likely throw things off? If it was vertical, I could probably leave it set up. What about running on more stainless pipe for the X axis with the “table” in a slanted vertical orientation?
YETI COMMERCIAL DESIGN
I’m also really intrigued by the new www.YetiTool.com Smartbench. Unclear if it can cut in a vertical position or if they are just putting it vertical for trade show display, but otherwise a similar but different approach to a walking CNC like the LR2: https://www.yetitool.com/products/product-details/smartbench#VideoMainContainer
No real reviews in the wild yet of the SmartBench yet as they are just shipping later this month. Intrigued to see where it goes. They just posted this background on how it works: https://www.youtube.com/watch?v=FIZJTIuOIrU&feature=youtu.be
That being said, at $6K it’s a very different beast and I can’t see how it’s materially more capable than the LR2 so it will be interesting to watch as more details emerge. It is the one device I’ve seen that is closet to the LR2.
FEEDS, SPEEDS, ACCURACY, PRECISION & REPEATABILITY
More generally I was also wondering about the specs of the LR2.
From what I have been able to glean from the forums, it sounds like a feed rate of up to 15 mm/s (~35 inches/minute) is reasonable at the high end. The Shopbot at my local Makerspace likes us to run plywood at ~70-80 inches/minute, so it’s pretty amazing the LR2 can match half of that for a fraction of the cost.
Is it viable to run 3/4" plywood in the LR2 at 15 mm/s with say a 1/3 (6.3mm) depth of cut using a compression bit?
How accurate and precise is the LR2? For example, would it be viable to make a Festool MFT style top on the LR2 where the goal is to have 20mm dog holes on a tight 96mm grid over a 3 x 5 foot surface? Is accuracy down to 1mm or .5mm or .1mm? https://www.festoolcanada.com/products/workplace-organisation/multifunction-table/495315---mft3
And how repeatable are the operations between runs? If I have to stop between toolpaths on a job and set the LR2 aside for a bit then put it back on the table and continue a project that is half cut, is that viable? How do your re-zero it accurately? Also, following the Festool MFT example above, if I ran the same file on the same kind of stock on two different days, how closely would they match each other?
MAKITA RT0701C PRINTED PARTS
I already have an RT0701C that I love, and I see someone has posted a spin of the router cradle and a few other necessary bits for adapting the Makita to the LR2. Is it possible to order a printed materials set with these subbed in (or added on) for us Makita fans?
ONE STOP SHOP (Almost?)
Is it correct that if I buy the LR2 CNC Bundle, the printed parts (maybe with Makita sub in?:)), and I CNC the flat parts at my local maker space - then all I need to do is source the SS tube and with my router in hand I would have everything to complete the build?
I see you offer an LCD controller for just $15 (Amazing that is possible at that price). Any other goodies you would suggest to add? Does the e-stop just wire right to any of the Rambo boards?
RAMBO MINI or RAMBO V1.4
I see the CNC bundle includes the Mini. Is it possible to pay an upcharge and get the RAMBO V1.4 board? And what benefit does the Rambo V1.4 bring to a new build?
Thanks in advance for the details!