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- เผยแพร่เมื่อ 27 มิ.ย. 2019
- I try to continue with the #DIY #CNC #Router but I have reach a stop, where I need to complete a few small projects in order to continue
Also the very first movements of the CNC (spoiler ends bad) in need of more testing and tuning
Here is where I got the extrusions and brackets and Linear stages
linearactuatormotorized.name/c...
8020.net/
www.ebay.com/itm/Aluminum-ext...
Want to support the channel,------- by buying a reservoir you can help the channel grow and make you computer different
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www.radikult-custom.com/
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www.ebay.com/itm/223273705318
www.ebay.com/itm/223233814756
www.ebay.com/itm/223233794652
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Glad to see it's working. Well the speed is quite fast, also accurate.
I did not know that you could use pneumatic connectors to extend grease fittings. Good to know!
Possibly look into "Clearpath Servos" dead quiet, tons of torque and generally don't loose steps also don't require smoothstep boards.
Or an inbetween solution (both price and performance), Closed loop steppers and drivers.
Nice!
You could just buy a stepdown converter from 48v to 5 - 24v. I personal run a gecko as well and I went with a 48v to 12v step down converter and run all my limit switches and relays off of that.
what's up friend? I congratulate you for your CNC it was spectacular ..., where did you buy those linear guides and ball screws? Do you have an online purchase link? And lastly, why did you not fit encoder servo motors for your CNC so robust and precision?
when can we see the test cut video quite interested with the non moving gantry
Nice work! subbed! I'm a fan of the fair cheap JMC 180W servo's. Smoother than steppers, faster, torque is perfect (a stepper looses holding torque with microstepping). I'm using them on my machine too, and they perform awesome. Clearpath is a clear winner in terms of user friendliness (their auto-tune is very nice) . The JMC's don't have advanced notch filters for system resonances, but they introduce far less resonances than steppers to begin with. The current available V6 (i'm using V5's) has some sort of auto-tune, but it's relative rudimentary.
Berend Lucas van der Weide I end up getting some Closed Loop Steppers, the clearpaths are great servos but I just didn’t had $$$ lol
@@radikult-custom Perhaps test one of the cheap (100usd/each) JMC 180W servo's! Closed loop stepper is a huge upgrade from the standard steppers! Do you use your machine to earn money or is it only for your own parts?
Berend Lucas van der Weide I use my cnc to make my own parts that I sell on eBay. So yes I use my machine to make money
good. I also use my machines for that purpose. I do have some regular customers, make furniture on my larger machine, smaller one for aluminum and plastics/occasional steel. It's nice to enjoy what your doing and make money in the end.
You should really consider purchasing one of two things. 1. Clearpath Servos, 2. Moons close loop steppers. Your current build is too good for standard steppers.
Mike O'Connor I have clear path servos on my other cnc, and I’m considering getting them for this build or just some close loop steeper’s since those are a bit cheaper than teknics servo
Thanks for the input I’ll check those moons steppers
@@radikult-custom Cool. Great build.
Radikult I totally agree with Mike. You need better motors, so get some closer loop steppers when you can. As I told you, I can get you a good deal from my suppliers.
@@radikult-custom also consider the integrated Servos from JMC (180W will be probably more than enough), the price to performance is really good
Radikult One thing you should do first is to run this test on a true/flat surface. I kno for a fact that the extruded aluminum u have on your bed is not flat at all. They can have low or high spots as bad as 0.3mm to 0.5mm. So when you are done with your controller etc, calibrate, tram and surface your machine before running such tests.
If he trams his spindle completely perfectly perpendicular to a reference point on the bed, couldn't he just machine the whole bed suface flat with reference to the gantry? Wouldn't that eliminate that problem?
mhe0815 Yep, that’s exactly what I’m saying.
@@VHERSACNC Oh, ok, got it now, thanks!
Greetings from the UK, thank you so much for sharing your wealth of knowledge. It has been a while since you made this rebuild using repurposed equipment into a precision fixed gantry milling machine. Would love to know how well it has performed.
Btw can you please tell me how to create the gcode for running the speed tests you showed in this video.
Greetings 👋. I have build a few CNC and by far fixed gantry is the best type for precision.
The Gcode was made in a CaD program like fusion 360, just cutting a circle in the air are different speeds for example.
@lt-custom Thank you for your reply. The problem I have is getting hold of the type of extrusions that 80/20 Inc make are not available in Europe/UK and the only way to get hold of them is someone can bring when travelling in our direction but depending on the lenghts/weight that can also be a problem.
The nearest quality one can get to strenght is maybe getting profiles supplied by Mitsumu but their prices are very expensive for small orders.
BTW - did you ever get round to covering the x-axis with Epoxy? Would love to see more videos of your cool machine milling different materials. Take care my friend.
couldn't you use inputs 1-4 on the gecko for your limit switches i think they are 3.3 to 5 volts max. O and can i get some links to the touch probe, tool setter, and dust shoe in part 2 of the build. loving the cnc build videos i finally subbed
Ever Random here is a link to the touch probe
drewtronics.org
The dust shoe I made it myself
And as for input 1-4 on the g540 are negative trigger of the same 48v power supply. Thats why I can use that with the optical limits
@@radikult-custom man that dust shoe is sweet i would love to see a build video of it maybe one for the new machine? im curious how you formed the sides a heat gun maybe?
You had your z axis assembly the correct/best way round originally, you should have kept it that way and worked on the deflection by other means, now your cutter is always a set distance from the first bearing support, originally this distance was dynamic and changed with the Z height at any given time (dynamically optimal). More tuning is correct, you can hear the motors stalling in your z axis tests. Join us on www.mycncuk.com 👍
His ball screw from the original is too far from spindle. This one is more directly connected to spindle than the original that needs too much plates going aroung the gantry.
You could remove or shorten the Z plate that the spindle mount attaches to and clamp the spindle higher up. The spindle motor is very rigid, it's a stainless/aluminum tube and is much stiffer than your aluminum bracket. And you would be removing a source or vibration and weight on the Z. If you delete that bracket completely, you would also be reducing the distance your spindle overhangs the gantry, which will increase the stiffness even more.
Reini Grauer I actually did that before making that extra aluminum plate. And you are correct, even do the spindle was attached at the very top I didn’t see that much play.
The only issue with that is that the spindle didn’t quite reach the bottom Y axis table.
Maybe once I make the vacuum table I’ll re measure the spindle depth and maybe remove that extra plate
Thanks for the input
@@radikult-custom The end of the spindle doesn't necessarily have to touch the bottom of the table, as long as the shortest tool you are likely to use does.
In your previous video showing how you filled the extrusions with epoxy granite, it sounded like there was a big difference in ringing and vibration control when you tapped on them. But in this video at 7:50 You are still getting a lot of vibration running at 28 IPM. Have you found a fix for that? I have a similar situation. I was thinking of putting some foam board or shag carpet between the cnc and table to absorb some of the vibration.
I was using stepper motors for testing. After I change it to Closed loop steppers I don’t see the “vibration” like in the 7:50 min video
Maybe if you use a thick rubber mat can dampen the vibrations
@@radikult-custom so you get less vibration from the closed loop stepper? any chance that you'll be demoing how it runs with those?
@@bigvelvetdog this was the final video I made. It shows a little bit of how the machine is moving at some slow speeds when probing
th-cam.com/video/3dYUZVZPBNs/w-d-xo.html
Don't expect your dial indicator to retain any accuracy pounding away on it like you were doing!
gwharton68 I actually figure out why I was loosing steps on my z axis. The couples was a bit loose.
So ... You went through all the effort of epoxy granite filling the extrusions to get a better finish ... that means using real steppers would be silly and you should go with servos. Steppers ... step. You can see that 'stepping' in the finish. Servos don't have that issue and provide a smooth motion.
I'd consider closed loop steppers and a good quality hybrid driver, then max out the steps per revolution. This should be well suited to an aluminum machine. These days good steppers with good drivers can get high resolution & low noise but still have low torque at high speed and also lower efficiency for similar performance versus servo motors. Closed loop stepper systems are about 1/3 the cost per performance vs servos on the low end of the scale (up to NEMA 48 maybe) so as always we have to weight the pros and cons. Really though servos only become the best or only option when a machine requires torque or speed that simply isn't available from steppers for practical reasons (ie power dissipation, inertia considerations from the mass of the motor etc) or availability, which you get into on larger heavier and faster production machines.
I cant buy reservoirs on ebay. You have no items listed. Help!!
TGDxDrakoon I’m currently on vacation, I’ll be back on 8/24/19
Whats causing the stepper motor to make so much noise at low speeds
Fisherman Neil “power” the more voltage you give to a stepper motor the more noise it will make at low speeds. (Testing with 48v) But if you give very low voltage(24v) it won’t make to much noise but won’t have torque/high speeds
you are making a very good machine
servo motors or hybrid stepper motors would make it a much better machine
It would also be a great improvement that you forgot about the mach3
and you tried the Linux that goes in real time and is much better in everything
greetings from asturias spain
yes, Linuxcnc is where its at. If you have time and patience that it is :D But its also soo much better than mach3/4 or similar
Clearpath servos are nice but expensive and a lot of their built-in features are useless for direct step/dir controll.
JMC's integrated servos are more than enough for a hobby machine and cost only a fraction.
They also have closed-loop steppers with integrated controllers which are a good choice for the z-axis - during 2.5D operations on a router a higher holding torque on that axis is more important than peak power at high rpms. There's still a place for steppers, just not the cheapo open-loop stuff.
爺は呟く Z-Axis はそれが正しいよ、２機目で来たね観てて楽しいよ （Japan )
I'd suggest a better table. The aluminium one is to thin.
Chris Atack the idea is to make a base of cast epoxy granite. But I just need to make sure the rest is good before putting more work into it.
Also I’ll have to move the cnc to it’s final place before doing that.
Chris Atack oops, I read that wrong lol, yes the Y axis aluminum table is only 1/2 thick, but I have a piece of phenolic 1-1/2 thick to make a vacuum table with it and attach it to the aluminum piece too
What's making it lose its Z position so much? Pretty sure that's the biggest problem I'm having on my Shapeoko
Kaleb Israel in my case it’s probably the acceleration might be to high and the stepper can’t keep up with it. That’s why it take awhile to find tune a cnc making sure everything is working correctly
@@radikult-custom Wish I had the money to buy a fancy machine and pay someone to come tune it. x,DD
Tired of messing with mine always wishing it was much better.
Kaleb Israel that’s how I started. With a Chinese 6040. And I try to make some changes but at the end I just decides to put all the effort into building my own cnc.
I do wish sometimes I had the money too to just buy a new cnc but those can cost $$$$ lol
@@radikult-custom haas milling machines do not cost too much, moreover, if there are many people who request your products, you can pay the milling machine through a loan, but pay attention to the terms of the contract ... otherwise a cheaper alternative is the tormach, with $ 10000 you have a cast iron machine with an accuracy of 0.003 inches, it's not great, but the machine is rigid and could help you increase your productivity... customer service is bad if you want to make the return, but if you want to take the step forward from diy to something more professional, these are the two paths... if i can, i wuld go for haas
Libra SD a dream for me would be a Datron Neo but they cost more than a Haas lol
Why did you rebuild your machine? What was wrong with the first machine?
Maple_Dude this is not a rebuild. It a second cnc build from scratch/used parts
@@radikult-custom Was the first machine not meeting your needs?
Teach me
Wow, those steppers sounded like WWII planes in a dog fight.
aksting lol. Happy 4th of July? Or remembering veterans days?
@@radikult-custom Veterans day is for honoring veterans, Memorial Day is for honoring those who served and died, and Independence Day is a commemoration of the Declaration of Independence from the United Kingdom. As a veteran myself, I find Memorial Day is not about having fun, but remembering the ultimate sacrifices many have paid for our freedom. However, Independence Day is for everyone and the best way to commemorate this day is by simply exorcising your rights. I hope you have a very good Independence Day.
Are you using microstepping? Usually helps getting the slow speed vibration under control. Of course you loose speed.
pitu72ger I am using micro stepping, but it’s just how steppers work I guess. I just need to buy either servos or Closed loop steppers
@@radikult-custom I highly recommend the 3 phase closed loop steppers. They are very quiet. Not as silent as a well tuned brushless servo, but as good as you can get. Nema 23 motor and driver will cost around $160.
U should probably skim the plate with the machine to make it true
As an engineering student I must say great job!!
I have seen your whole build the one thing which annoyed me most was when you said I have so CAD..:(
As I continued watching I had some issue with your design since you have addressed in fine tuning i wont talk about that But,
i felt there was waste of material,If you had a CAD model you could have simulated and fine tuned the model and it would have turned out better.
the other issue was WHERE IS THE COOLANT!!!!
atleast may be a fog buster i would suggest otherwise Enjoyed watchin it!!!
Sounds like a can filled with a bunch of screws and nuts
mill the entire table with rhe router itself.. it will then be .00000 trammed across the table.
that only works if the X,Y and Z axis are perfectly square and flat to 0.0000000 inches (which no machine is and will ever be)