EPIC CNC upgrade - episode 5. making a precision gantry side plates. how to do this right.
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- čas přidán 28. 06. 2024
- this video I will make a Submicron precision gantry side plates, from the plates I have lapped in the previous video.
• EPIC CNC upgrade - epi...
I will show my approach in the assembly and fine tuning with the dial indicator.
This might be handy for some of you who are building their own CNC.
You might be wondering why it is so important for all the components to be so flat and square?
Every of those parts meets with other part, and if something is not perfectly flat, than the bowed part will also bow the part which will be attached to it.
IF components are not installed perfectly it will cause distortions along the travel and premature failure of the rails, carriages, and ball screws.
In case of very rigid machines it could even seize one of the axis or crack the frame. etc.
in light weight machines, it wont be noticeable much as the whole machine twists and bends while moving any of the axis.
please let me know if i missed something or i have skipped some important details, so i could incorporate more explanations in the next episode before I finish all the upgrade videos.
I have made a website where you can find plans and in the future it will be the place for everything related to the channel and the cnc itself.
link:
www.flyingfoxcam.com/cnc - Věda a technologie
One video a week? Now you are just spoiling us :)
i know :D
Its for my own good, i have so much stuff already recorded that i have to turn them in to the video in case i forget to record something before its too late.
That LM guide looks like the ones used on the big DMG Mori mill-turn machines at my old work! This machine is so deliciously overbuilt.
Can you make a video demonstrating your sandblasting/painting/anodizing processes? Your matte black paint jobs are so consistently flawless. I need machine paint jobs like that in my life.
Ok i will. Let me finish the cnc upgrade series first ;)
@@PiotrFoxWysocki u da man! 🤟🏼
I would be a bit worried with all that abrasive material on the surface plate. especially resting the 90degree master on sandpaper. maybe worth checking them against a "clean" surface plate every once in a while? great project and thanks for documenting everything so detailed!
to me granite square is just another tool, and it meant to me used and worn, just like anything else.
I wont be putting it on a pedestal and worship this piece of granite, i will grab it and put it to work :)
i use it very rarely, so it will take me years to make any difference to it. and than or i will fix it or get a new one.
yeah this time I'm trying to make those videos better. so it all makes more sense.
but anyway its really hard to make it short and explain everything. i don't even think its possible. but i'm doing my best :)
@@PiotrFoxWysocki makes sense. I totally agree a tool is meant to be used and as long as you know what precision you still can expect from these measurement tools its all good. especially when you are chasing sub micron precision nothing should be assumed. thanks again and all the best
Lmao you must be new here. Watch his other videos, the guy probably knows the thickness of each hair strand on his head
Fantastic, as usual. The common knowledge seems to be that one cannot flatten with sandpaper because of the uneven pressure exerted by ones hand. As far as I am concerned, you have proven that wrong. Thanks!
i totally forget about it :) but yes you can not flatten things with sand paper. your comment proved me that i didn't explained it well enough.
plate i was sanding was 25mm thick and quite long, so it was quite easy to keep it at the right angle.
i have sanded off mostly the burr on the edge and some high spots from the endmill.
and i did it with granite square. finished it up on 1200grit sand paper just to take off scratches from the bigger grit. all the stuff i have done with isopropyl alcohol to don't have surface tension as water has, and alcohol doesn't curl sand paper as much as water does.
then i used polishing compound to make it flat on the surface plate, and this is what makes it flat. and than rubbing it over the surface plate with turpentine which last longer than isopropyl, this was to remove low spots at the front and at the end of the plate from polishing compound. and then with isopropyl to clean it off.
i have started with reasonably flat part, i just made it flatter.
i guess its much more tricky than it looked. practice is important as well, i guess...
@@PiotrFoxWysocki Thanks for clarifying!
Wilco Juffer
Hello Piotr, again one high performe video not only the video but more your plate's 👍
Many thanks!
"watchmaking"-dimensions on plates hihi. Nice Video Piotr
😁
Nice! To avoid cutting the vac plate, maybe indicate Z on the vac plate and enter the raw stock height manually. Cheers!
Your machine will probably be as good as a Datron when it's up and running 😀
I would wait until its all assembled and tested before drawing any conclusions. for sure it will be better than it was :D if i wont break something by accident :D
Спасибо за науку.
;)
Mindblowing
this one not so much, i just had to do this as a part o the build, mind bending stuff will come shortly :D
Waiting for a grand final 👍
so do i :D looks like this will be a soap opera. :) 1053 episodes :) i'm trying not to miss any critical step in this assembly. not sure if anyone after watching the whole thing would go and do something similar :D
@@PiotrFoxWysocki i wonder why didn't you build a fixed gate construction and movable Y axis? Any reason for that? More workspace this way?
exactly. smaller machine
Great to see you getting some content out again :D Great work on that cnc :)
thanks :) More to come!
@@PiotrFoxWysocki ⁸
Best machine ever I saw on CZcams Fox's engeneering is amazing and if you watch from start to end you can chaise tolerance you need for your application. Nex mont Iam starting making machine same as Fox but from steel.
Good luck. May the patience be with you ;)
@@PiotrFoxWysocki tenx a lot -grandmaster- FOX I hope you keep in mind my offer and you can came and see my work. Best bottle of 12 years old rakija (palenka) Has your name in it😉. Keep thet in ming I would be honored to have you and your family for a guests. Greetings from sunny Belgrade
Nice
Thanks
Hey Fox, question for you. What kind of a touch probe are you using?
P. S. I'm ordering some of the collet chucks you recommended in a previous video. Good job finding these high value components.
im using a 10mm drill blank with ground dome on the bottom. that's all. its connected in mach3 as a probe, thats why i put this alligator clip on it
yeah i have to order more of those tool holders my self :) maybe after i finish this machine upgrade.
How does anodizing not impact your perfect surface?
anodizing grows very uniform on the whole surface. part might get thicker and holes become smaller, but only by few microns. in return surface is much harder and does not oxidize anymore. in overall it doesn't make part wobbly, or change its parallelism.
@@PiotrFoxWysocki that's counterintuitive. I'd expect some part of the surface to get coated more than others, but I guess it depends on who is anodizing the part. Thanks.
I do my anodizing ;) so im not worried about it 😁
Another informative video, a pity we don’t live nearer to help and exchange experiences with each other doing a tandem build?
I agree. Would be nice to live closer to civilisation ;)
Thanks for that Video.. I have all the tools you have just used but not really thought about using the surface plate like that, i have just been using it to messure the height of my work pieces and making out..
why use rubbing alcohol and not water?
If you have surface plate dedicated to measuring, it should stay that way. For sanding/lapping ets. You should get another one, preferably cheap but still reasonably flat. Sanding with waste makes gooey slurry and doesn't sand well. Alcochol makes it sand no matter what. Just try and you will see the difference. Isopropyl dries quick and in the last stage of sanding is clearing all the dirt from the surface. Turpentine works kinda similar but it last a bit longer. I use both depending on application. Best is to try it your self.
@@PiotrFoxWysocki right thanks and that makes sense, I have some Isopropyl so I will give that a go tomorrow..
and yes I was just looking at getting a bigger plate as the one I have now can be too small somtimes..
I am building a small CNC with a fix gantry and a small 300x300mm working area that is basically solid aluminum and your videos have been a great help for me with my build
I'm glad you find those videos to be useful ;)
Insane! I am curious about the cost of the various parts, like the linear rails and ballscrews. Did you buy them new or used? Also you seem to have some glitches with the audio
Edit: another question: all the parts are made of aluminium, isnt that going to bend under heavy loads? Wouldnt steel be a better choice for precision?
THK NNB BNFN2005EFM-2.5RRG0-399LC5F Z Axis Ground Ball Screw BSC-I-543=1D65 - US $249.90
TBI NNB DFDR2505DRD-719.5L double nut Ground Ball Screw 2505+719 BSC-I-715=1M21 - US $200
Schneeberger Roller Linear Guide Bearing MRC25G2-V2+1000L 2R4B Used MONORAIL MR - US $449.90
THK Preload Ground Ball Screw Used DIK2510-4+1105L support unit CNC router - US $299.90
IKO Used LRX20+360mm 2Rails 4Blocks ROLLER LM GUIDE THK SRG20C CNC Router - US $269.90
SYK Nut Bracket MGD25 - US $49.97
SYK support unit FK15 - US $56.22
SYK support unit BK15 - US $70.34
SYK Motor Bracket MBA15-D - US $40.62
MTO Coupling GFC-30x35 - 12x14 - US $11.08
MTO Coupling GFC-30x35 - 15x14 - US $11.08
load wont be heavy, weight of aluminium is better and because is softer than steel it dampens high pitch vibrations better, etc. for example KERN machines are made out of aluminium.
@@PiotrFoxWysocki you are so generous sharing everything. thank you
@@PiotrFoxWysocki Woah! Very very interesting! Thank you!
Thanks for sharing. Do you use cast aluminium plates?
they where t651 rolled and stretched plates, which i had to lap to make it flat. czcams.com/video/3szAiQqCV2M/video.html
@@PiotrFoxWysocki thx. cast aluminium plates are tension-free
and often fine milled. so you would have
less work. anyway, great work, impressive
result. best regards from germany
How do you ensure the gantry stiffness?
Gantry is made out of granite. I will get there in the next episodes
Hi don't mean to piss you off but you might want to separate all the references (granite plate & angles and straight edges) you have from your abrasives your impregnating them with these abrasives on a micro level and wearing them out if you need to use these tools with abrasives I suggest covering them in a sheet of aluminum foil so there is less chance of impregnation and wear. This technique is used to lap plates till optically flat with out damaging your tools. Its your tools but if interested in any of these ideas you can reference this video for help start at 24:51 for just the info on lapping czcams.com/video/_EypdnIydCg/video.html or you could dedicate these tools to just this purpose but then have a master set for true measuring purposes.
no worries :D I'm not pissed off :D and i wont be :)
maybe it doesn't look like i don't know how to handle granite surface plates etc.
im just making things how i make thing and those granite bits and pieces are just tools. if they break i will fix them or get new ones.
those granite plates are not ultra precise, and i don't care about them much.
but they are more than good enough for those measurements.
for the purpose of the video i could wear a white gloves and handle them like piece of nuclear bomb as you can see in some other videos. to make sensitive people happy :)
But this is not the point of it, my point is the end result of this what i'm doing.
Not the political correctness in tool handling etiquette :)
trust me, i know exactly what im doing and implications of my doings :)
I just hope my comment didn't offend you, as it wasn't my intention. i just explained my motives as simply i could.
@@PiotrFoxWysocki no problem man get after it your work inspires many
6:12 why dont you probe the rotation?
because I'm lazy :) if this would be a critical dimension cut i would. but it turned up bang on anyway :D
20:26 what was that sound?
that was the squeak of plate sliding on the granite plate
Torque the screws :)
thanks for reminding me :) done them twice now, they shouldn't move :D
@@PiotrFoxWysocki on this subject. I know when putting back a head on a motor block. There is a certain patern and torque level sequence to be followed not to twist the head. Wouldn't the same principle apply here since you are flatter than flat now, but bolting the parts with unequal torquing sequence, bow a fre microns?
Its maybe not to dont twist the heads off but its good to bolt with dial indicator to see how it influences critical dimensions.
7:49 rip my speakers
haha :) rip my ears :D i turned down the volume in edit about 10x already.