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#43 MOOT_ONE / CNC Linear Motion Actuator - SFU1605 - HGR15 Rail Guide 

Educating Savvas
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In this video I assemble the X Axis linear actuator for the latest rendition of the CNC machine. It uses larger HGR15 rails and two thicknesses of Valchromat plates. I’m actually going to recreate the machine you’ll see at the end, as a smaller 600x600 rail model which I’ll replace the current smaller one - and in the process write the manual. The manual has been something I’ve mentioned on and off several time but each time I took a step forward I noticed something which prevented me from committing the design in writing. But this is the one… again.
00:00 - Intro
00:31 - HGR15 Linear Rails
01:07 - Different Rail Block
02:59 - Parts For Assembly
03:42 - X Carriage Plate
04:25 - The Important Bit
07:04 - Rail Aligning Process
08:09 - Checking
09:15 - Conclusion
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Website: www.miscpro.com
#EducatingSavvas #DIYcnc #DesktopCNC #MootOneCNC

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8 июл 2024

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Комментарии : 71   
@HLTNC
@HLTNC 3 месяца назад
very good
@iftikharsajan5158
@iftikharsajan5158 4 года назад
very nice bro
@EducatingSavvas
@EducatingSavvas 3 года назад
So nice
@donepearce
@donepearce 2 года назад
Always home the z-axis to the top surface of the workpiece using a solid contact plate of known thickness, not a switch. You have a whole heap of variables and unknowns between that switched zero and the workpiece.
@Fabricefabrap
@Fabricefabrap 4 года назад
a big improvement. use a BF support on the stepper side.
@EducatingSavvas
@EducatingSavvas 4 года назад
Yes it is. I can stop here now. I have used the fixed part on the opposite side of the machine with the ball screw reversed, so there is no need for BF support at the stepper. Means I'm using less components .
@auhopu
@auhopu 4 года назад
Any manual you open, from NSK to Hiwin to Thomson, shows the fixed block (FK12 in your case) on the driving side and the floating (FF12 in your case) on the far end. There is a reason for this: thrust. The motor side is where you need all the support you can get. The far end needs to be free to compensate for the (micro) contractions. This is where the FF12 comes in play. Now it's locked.
@EducatingSavvas
@EducatingSavvas 4 года назад
You're right - but I think that's only really important if your machine is massive, and you plan or can run you machine at really fast speeds - < 6000 mm/min. Mine maxes out at 2000 mm/min. There's also some flexibility and lateral adjustment in the motor shaft coupler - which is why I didn't use a fixed one there, and instead a spider type which pulls apart. The ball screw is not being pinched so it can adjust ever so slightly. Also save on part costs as I don't need the FF12 and stepper stand off.
@auhopu
@auhopu 4 года назад
@@EducatingSavvas Small feedrates will limit you to small chiploads which opens a new can of problems. Don't settle with this. You can solve it by matching your motors to your power supplies. Low speed means too high inductance and/or too low voltage. Ideally you should power your motors with V=32*SQRT(L) , where L is your inductance in mH.
@EducatingSavvas
@EducatingSavvas 4 года назад
@@auhopu I thought 2000mm/min was pretty fast. It's a lot faster then the... x carve! This is ment to be an entry hobbyist machine but I'll re-look at my driver's and configuration when I have time. I'm happy with the design but the controller side of things is not fixed.
@auhopu
@auhopu 4 года назад
@@EducatingSavvas Actually X-Carve is 4x faster at stock settings (8000mm/min). X-Carve too has unmatched power supply to motors (i.e. low RPM), but it can hide this weakness due to it's belt and pulleys (40mm/rev). With a 5mm/rev ballscrew you cannot hide low RPM. Please don't take this as negative criticism. I just happen to have made the trip from X-Carve to 1605 and have faced all these roadblocks along the way. Your machine, your way.
@jimmer147
@jimmer147 4 года назад
good enjoyable content as always, thou every time you upload it makes me think about adding linear bearings to my machine. one question thou, it looked like the x axis rail assemble comprised of two 2040 rails, coupled only at the ends. surely there is a lot deflection/twist when cutting in the Y direction. i would imagine that a 'plate' that coupled them together along their entire length would greatly increase your machines rigidity.
@EducatingSavvas
@EducatingSavvas 4 года назад
Cheers! Bear in mind there's 15x15mm square steal bolted to the profiles - so that helps with rigidity. On the machine at the end I bolt the x axis onto another two profiles lengths which span between the Y Plates, and that shores it up even more. I could add a few diagonals plates at the back like you suggest.
@chobletchoblet3273
@chobletchoblet3273 4 года назад
Surprised no dial indicator was used. Nice move - it seems to work.
@EducatingSavvas
@EducatingSavvas 3 года назад
I've got two different types of dial gauges now and going to test how well my set up actually was. Seems to work but will find out soon.
@raulirimias4810
@raulirimias4810 4 года назад
Man,you are fantastic. I like your improvement since the early videos. Thank you for your generosity and keep improving. Salutations from France. Where are you based by the way?
@EducatingSavvas
@EducatingSavvas 4 года назад
Thank you! I think I can stop here. Work on my manual now. I am based in London.
@raulirimias4810
@raulirimias4810 4 года назад
@@EducatingSavvas Ok
@kostasfalis3945
@kostasfalis3945 3 года назад
Hello, what do you think is the minimum distance step that the carriage can move(I mean 1mm, 1cm? etc)? Do you think you can achieve lower than 1mm using a ballscrew/rail guide/stepper motor setup? Thank you for your video , it is helpful!
@EducatingSavvas
@EducatingSavvas 3 года назад
Oh it can be very small. The web controls have 0.1mm as the smallest increment along the x and y axis, and 0.05mm for the z. But it could be even smaller. If you use a tighter thread or ball screw with less travel, again further reduced.
@Slavko_Husam
@Slavko_Husam 4 года назад
are the HGR15 enough rigid to hold the weight including the spindle ? I'm building similiar setup so it will be useful info. Thank you!
@EducatingSavvas
@EducatingSavvas 4 года назад
Only for machines with smaller x-axis as I've designed for the manual I'm selling. But I tried making a wider version and had to shim the z axis. My manual is available to buy from my website if you are interested. Cheers.
@Slavko_Husam
@Slavko_Husam 4 года назад
@@EducatingSavvas did you calculate like how many kgs does the HGR15 can handle approx. ?
@graveurgraveur2691
@graveurgraveur2691 4 года назад
Will you do a video on programming the wretched VFD for the spindle? I'm new to cnc and already had two spindles go up in smoke.
@EducatingSavvas
@EducatingSavvas 4 года назад
I've touch on this in several videos but do you want to send me the details of what you've been using. If you can't add a link here go to the contact section of my website and send it there. I'm going to add a section about programming and electronics in the manual I'm working on.
@UberAlphaSirus
@UberAlphaSirus 4 года назад
I think neocnc went in depth on vfd setup.
@EducatingSavvas
@EducatingSavvas 4 года назад
I don't have enough time in the day to do all the things I want... :(
@JesseSchoch
@JesseSchoch 4 года назад
it seems like you are going to have lots of flex when cutting in one direction due to the rectangular profile you picked. it doesn't seem to have much ability to avoid twisting. Did you look at the design with any FEA mockup? this is pretty easy to setup with fusion 360.
@EducatingSavvas
@EducatingSavvas 4 года назад
I don't know how to do that. But bare it seems pretty good when I use it. Bare in mind the X Axis assembly in the video is bolted onto the gantry which is made with similar 20x40 plates. Plus the 15x15 rails will add some stiffness too. In the worst case scenario I could add more plates at the rear to stiffen it up or 3D print some triangles to go between the gantry profiles.
@JesseSchoch
@JesseSchoch 4 года назад
@@EducatingSavvas search youtube for "fusion 360 fea" it is well worth the hour you'll spend learning how to do it. Fusion 360 in general is well worth learning for both the CAD and CAM. I think you will be surprised at the results for your designs.
@UberAlphaSirus
@UberAlphaSirus 4 года назад
@@EducatingSavvas mdf panels would suffice to help racking and bending. You need it for the wasteboard anyways. The z will get bouncy in the middle of x. Z has to be more rigid the harder the material cut. Especialy if the weight of the z isnt enough to eliminate z backlash.
@oliverrowe8648
@oliverrowe8648 4 года назад
@@EducatingSavvas I second that, you should chuck it in fusion pretty easy to do and can tell a lot about your design
@hrishikeshb
@hrishikeshb 4 года назад
Really neat! What material are those red coloured plates made of?
@EducatingSavvas
@EducatingSavvas 4 года назад
They are Valchromat. Really nice to work with.
@hrishikeshb
@hrishikeshb 4 года назад
Educating Savvas Aren’t they a form of wood? And hence do they have the mechanical rigidity to withstand the massive cutting forces in a CNC? I’m guessing machining metal would be pushing it too far with Valchromat plates?
@EducatingSavvas
@EducatingSavvas 4 года назад
It's surprisingly rigid. I think it could cut aluminium with the right tooling and feedrate. This is the most rigid machine I've built so far. And it's a hobby machine.
@hrishikeshb
@hrishikeshb 4 года назад
@@EducatingSavvas Thats news because everything I read about Valchromat tells me that its a slightly denser and coloured version of MDF. Please do make a video if you do cut Aluminium on this. Btw, I really like Candle but it has not been maintained since forever now. I've had good success with workflows on cncjs.
@LuisVargasLeon
@LuisVargasLeon 4 года назад
Hello, great video, I have a question. What is the power spindle??? and what is the motor´s torque for axis X, Y and Z??? regard
@EducatingSavvas
@EducatingSavvas 4 года назад
Spindle is 1.5kw and steppers are 3A with up to 1.9Nm holding torque. I'm using a duet controller so current set to 2.4 and works fine.
@LuisVargasLeon
@LuisVargasLeon 4 года назад
@@EducatingSavvas What it is the total axis Z weigth? regard
@American_Made
@American_Made 4 года назад
Did you make the end plates and saddle plate? Where can I get a similar setup?
@EducatingSavvas
@EducatingSavvas 4 года назад
I've just released the plans as a purchasable download on my website. Link to website in the about section.
@EducatingSavvas
@EducatingSavvas 4 года назад
Or www.miscpro.com/shop
@hungvu2375
@hungvu2375 4 года назад
Is this machine strong enough to cut aluminum sheet? I'm looking forward to a video of aluminum cutting ability test. Thank
@EducatingSavvas
@EducatingSavvas 4 года назад
Will find out soon. I've started working on the video.
@hungvu2375
@hungvu2375 4 года назад
@@EducatingSavvas thank
@jaandel1
@jaandel1 3 года назад
@@EducatingSavvas can i use this system to vertical lift ... up to 60 pounds... as a suspension lift
@rolandhilario2571
@rolandhilario2571 3 года назад
Hi mate what size of screw did you use for your linear rail?
@EducatingSavvas
@EducatingSavvas 3 года назад
SFU1605 - I sell build instruction on my website which could help you design and build your own.
@mertcapkin7263
@mertcapkin7263 3 года назад
could you share a link for the granite?
@EducatingSavvas
@EducatingSavvas 3 года назад
I bought this in store - but Axminister tools sell something now if you search granite surface plate on their website. It's a more pricier than a generic kitchen one from Wilkos or Argos.
@ameenibrahim7519
@ameenibrahim7519 3 года назад
why you donot use a steel or iron plate instead of using AL ? it will make your machine more accurate and stable
@EducatingSavvas
@EducatingSavvas 3 года назад
Too heavy for my floor.
@cmsaudioprofesionalboxspea1028
@cmsaudioprofesionalboxspea1028 2 года назад
what is the name of this digital tool?🙏
@JarppaGuru
@JarppaGuru 2 года назад
8:20 0.0 very acurate. means its 99.95-0.04 so what is error if it 0.09 angle max in lenght of that platform. what that error made in all travel xD eventually that is your axis even there would be 10mm error LOL it still move straight line. error comes out when add another axis that need be square. 1 axis is easy
@JarppaGuru
@JarppaGuru 2 года назад
4:43 yeah is 2040 extrusion it has 6.2 wide groove but use M5.(why goove not 5.95 M6 is usually 5.85. why is not 4.9 M5 would still too loose my taste) why there is no M6 LOL it would be +-0.1 each end. why not make custom aligment rod thas has 6.2 and 7 or 8 other depend hole on rails and use them on ends perfect square
@caspermaul7583
@caspermaul7583 4 года назад
No measuring at all with a dial indicator? Hmm...
@EducatingSavvas
@EducatingSavvas 4 года назад
I know but it's surprisingly effective but I should have used a dial gauge to show it worked. This process is a lot more accessible to the laymen. But I do have one problem with the dial gauge method, and that is if you are setting one rail to the other. Say you reference rail is off ever so slightly and you pull the second rails parallel - what stopping you just transferring that deviation to the second rail and carriage? This way you force the rails based on the axial driving movement. Square the blocks to the plate, pull the rails in line with the ball screw movement. Seems to work.
@evanovski
@evanovski 3 года назад
Savvas, I've dropped you a couple emails about getting these plates made from aluminium. Could you please respond. Thanks!
@EducatingSavvas
@EducatingSavvas 3 года назад
Hi Evan - they don't seem to be coming through. Did you use the contact section on RU-vid or via my website?
@evanovski
@evanovski 3 года назад
@@EducatingSavvas I went via the website form
@TheKatlakatla
@TheKatlakatla 4 года назад
these granite blocks tend to be a bit concave, its strange and a bit counter intuitive.
@TheKatlakatla
@TheKatlakatla 4 года назад
great video btw
@EducatingSavvas
@EducatingSavvas 4 года назад
Thanks - I've tested mine with an engineers square and flashlight and it seems better than anything else I could use. I guess I was lucky.
@stevenrichardson7882
@stevenrichardson7882 4 года назад
All your doing is making the rails parallel but not necessarily straight, not really a good example of how to assemble ball screws and linear rails accurately 🤔
@geekoid183
@geekoid183 4 года назад
Not a trace of a dial indicator to check the rail relative to each other and to the aluminum profile
@geekoid183
@geekoid183 4 года назад
That's just an assembly "mistake", it can be fix as he learn about it
@EducatingSavvas
@EducatingSavvas 4 года назад
If I was placing the rails on different faces of the profiles - say one on top and the other at the front, I’d use a dial gauge but there’s no need to over complicated this. The profiles ends are machine cut - so more square than I could ever get, and ball screw is fixed at one end and centred by the stepper on the other, on plates that are identical. The rails need to be inline with the movement of the ball-screw (which no one ever checks but should). The process I used aligns the plates to the nut housing and four rail carriages which pulls the rails inline. The only way the rails would be off is they are both curved and I’d somehow placed them parallel with the curve - which they weren’t because I placed them on the granite surface to check for flatness. Where it was off along the y axis, I have no control over because it's either the profile or rail, and unless I have a 0.1mm shim to place on the underside of the other rail. This process was designed to make the assembly easier, but feel free to tell me how it should be done.
@EducatingSavvas
@EducatingSavvas 4 года назад
@@geekoid183 There's no point because the ball screw and nut housing travel is the thing I want the rails to be aligned too and that's determined by the two end plates. The idea is to use actual movement to make the travel as smooth as possible.
@JarppaGuru
@JarppaGuru 2 года назад
9:36 there it is 2 axis crossing how good is it. and how you measure it lol. xy need squre (xy)z need square. how you measure them. yes yes some big square but how you know its square what you using to measure lol. onlyway i think is make bottom plate on work that has all holes and have grooves to measure axis are square, but it means machines will be smaller than real cnc. i want make bigger xD 850x550mm in real cnc is too small when boss take jobs that has HOLES over that. i not get it need 2 setup even make hole and how you think what happen when cant mill it one GO it will not be flat there is allways alignment error MAX i seen 1mm for some linear thing lets just grind it LOL i would not pay even penny for that. i would not make job that is bigger than machines travel LOL and think when i make setup and then someone like boss just throw peace in and think machine cut it allways same way. pieace can be put wrong LOL think make setup and knock workpiece to parallers and make it 0.001 flat in 700mm then others throw part in and not knock piece to paraller piece will me under side and not flat right? they move z offset and it might be good but when master come work and hit paraller its funny i get part 0.2 too thick but FLAT when there is 30 piece done and there is 0.2 height error both ends LOL boss say its okay OR they try change program to move Z to correct thickness LOL and we not even paraller they are just what ever straight metal (sometime) they not flat anymore and full holes LOL and they never fix them so its not even hold piece correct LOL and there is allkinds of tools marks on vices. best one is 10 wide goove on jaw that move 6mm in z all cros 150 vice jaw when mill has slip on ER holder i bet its been cut it like butter even jaws are hardened not soft saw. not any sound mayby nobody hear or care if machines make noise haha. thats my daily work on real cnc job lol. and cant buy tools for making parts or bigger vices or any machines squares to hold 400 tall part 50mm hold part on bottom is fine LOL i would add tool cost for parts but boss just try sell everything low so he get job !? what business is that. and still customers just bring part in and then drawings come later boss allready accepted they want allways tomorrow LOL i would allready see from part we cant do it. tired of job when drawing has bos writing only holes! and works piece is too big or its hard to clamp anyway and holes and thraeds are all side LOL parts are what ever plasma cutted and welded SO ACURATE make setup next piece is completely diff all is measure everything but again boss throw parts in it is fine CNC is acurate but part is located wrong place LOL.. well if you read this long.... no comments cant understand. there is english words? there is writing errors and english people cant read errors? lol
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