can i use CNC TB6560 4 Axis Stepper Motor Driver Controller Board in ox cnc machine

 

Hi,

Yes with out mechanical kit you can pair it with what ever electronics you like.

Ryan

 

Hi, building the Ox atm, in part one of the build video it mentions to refer to the diagrams when starting the chasis build, can anyone point me in the direction of these diagrams because for the life of me I cannot find them. I know it is me being dum.

I know there are diagrams for the Ooznest build but I have a feeling they do a slightly different build and following them might create a wee bit of confusion to an already confused old boy.

Cheers

 

Great videos and thank you!

I want to build an OX-like CNC that will cut fabric. It requires a larger area and the z-axis motor will need to be converted to a rotation angle for rotary cutting blade (with a manual spring loaded downforce). I have been hatching my plan as a master's student in engineering and really appreciate your work. Can you give me some advice?

Is there any reason this could not be expanded to a 5'x3' work area simply by using longer V-slot beams and longer wiring? Would it be best to put the longer axis on the double-motor axis or is there no difference, in your opinion? Any recommendations for the motor tweak from your experience would be appreciated.

Thanks and build on!
Ben

 

Scrub this, I was ofcourse being stupid.

 

Thank you, that is very helpful!

 

Hello Marck, I am in a design with 1600 oz Nema 34 or 115kg torque motors, weighing approximately 5Kg each + 0.7 of a nema23 motor for the Z axis, and a 2.2Kw spindle that weighs 5.5Kg + 2Kg from other parts in the X axis In total an approximate of 24Kg in the car X counting the 2 plates with motors in the Y axis...

Do you have any table on the maximum weight for profiles 20x80 of length of 1500mm?

Go to the design photo: SUPER OX NEMA 34 1600 OZ Motors!!!

 

Not to be a spoil sport but mounting 2.2kw of power to any thing other than a VERY robust frame may not be as handy as it seems. If the WHOLE machine can't cope with 2.2kw of cutting force you will need to back the power to be less than the weakest link in your system and will be spending a lot of cash to move around dead weight. Yes larger tools ( some one fact check me on this one) can produce better surface finish but this is not an advantage if your whole frame cant keep the work DEAD still as any wobble will be seen as cutter chatter.

A smaller spindle that is a lot lighter will have FAR better acceleration and smaller cutting loads that in my opinion are more inline with the performance expected from standard OB parts. Both options end up being able to put the same KW of power into the work BUT the lighter rig will be able to run MUCH faster with better cut results as less time is spent accelerating the heavy load. Rocking HSM and fusion also gives you access to pimp adaptive cutting methods really help make using small tools far less of an issue to as the code created is such that the cutting loads are very stable so you can really crank up your feed rates to claw back some losses from using smaller tooling.

An other way to look at it may be what is the point of putting a super car engine into a fiat pronto body.... The power is nice but open it up full thorttle and the pro little frame is bond to bend.....

So back to your question... 2.2kw spindle on a Cbeam to me sounds like a bad idea BUT maybe bolt a few together and you could be onto a winning solution ( my last 2.2kw router build had a gantry that was a single 120 x 80 extrusion). For one stock lenghth of Cbeam I would match it with a 800w spindle for the above reasons as to me it has been the best power, cost, weight and noise ratio but then again I have seen a few 2.2kw builds on the site so maybe best to wait for someone to chim in. A little warning that I could be being overly worried as I have been known to over think even the simplest of things!

What are you planning on cutting as all of the above becomes moot if actually only want to cut foam but considering the size of your motors I am guessing you had harder cuts in mind?

 

WOW!!!

Results= X axis= 0.26mm and Y axis= 0.14mm with 3 supports!

Then I will use 5 Supports for Y Axis!

 

Watch this:

 

Nice build but it just really backups what I'm trying to say.... To me I see a BIG build, BIG spindle running slowly at no where NEAR the full power being drawn from the spindle. Yes this build could then take deeper/stronger cuts but if your not doing that ALOT personally I see it a waste of cash and effort to build it so rugged if your not going to use it.

A smaller spindle on on the same frame would actually cut better as you could double, if not triple the accelerations. Not as noticeable on long straight cuts but get into fine details and cutting results and cycle times will both be far better.

Can any one confirm if the gantry is Cbeam/Vslot as to me it looks like a much bigger profile with also metal V wheels on V rails?

 

The Rail X in the video is 60x120mm, I will cut Aluminium in 2" and Iron... I think in build a similar machina that in the video but with OX system Rails: 2 20x80 1500mm in the X Axis and 2 20x80 3000mm in the Y Axis with NEMA34 Motors (5KG for Motor)... what do you think?

 

cutting 50mm thick ali. and iron on a router sounds like a bad idea and I think you really should be looking to build a mill if that will be your bread and butter on this rig.

ANY router is going to struggle with iron or mild steel as it is cut best with low rpm and high torque and sees far more cutting forces (that is why mills weight a ton and are build like tanks). Routers are best suited for non-ferrous metals and softer as you can cut much higher RPM, much lower torque and lower cutting loads. Think that many faster shallow cuts will finish the job in the same time as one big aggressive cut.

While a beefed up OX (do I get extra points for the rad pun?) might be able to mill a 50mm thick slab of ali, I think ANY router trying to slot cut in that depth of pocket could suffer clogging and tool snaps so make sure to factor in some high pressure coolant into your build OR you will be force to mill out over sized pockets just for chip clearance to get down to full depth.

What size parts are you trying to make?

 

1500x3000mm

 

Thank you very much dear Friend!

 

Minor problem which I am sure can be easily solved by a guru out there.

Just doing the wiring on my Ox build, i have connected the fan to the fan pins on the xpro v3 board but the fan does not function The problem is that the board provides three pin outs but my fan connector only has 2 female pins, I have tried it on just two pins either way round but with no luck which leaves me to think it is the two end pins that are live, can anyone confirm what is the correct pins as I am nervous of shorting something out.

 

Many thanks JustinTime, electrics are not my thing as you can guess.

Sounds so obvious when you hear it from someone who knows what they are doing.

 

Looking for any help you can provide. I have had my OX for a little over a year that I purchased from SMW3d, but have not had much time to do anything with it because we had a new baby. I am starting to get some free time now and have been trying to get to the garage to play around. I have been having issue with consistency. I am having issues with missed steps and incomplete projects. I have been trying to cut a series of 1/2 holes in a piece of MDF to make a scissor holder for my wife. Every time i run the program i get a different outcome. I have not had one time that it could complete the cut of one hole all the way through with out binding up. This then throws off the rest of the cuts. I have tried to slow the feed rate down to 20, but still the same problems. I am using Chilipeppr to send my G code and Vcarve pro to create my projects. Attached are the settings on my Tiny G.

Any help would be greatly appreciated.

Thanks,
Justin

 

Hi,

Built a 1000x750 OX from an Ooznest kit. Using a single-hand Makita clone router (~700W, 30K rpm, 1/4" collet) on it. Electronics are grlbShield with A4988s, set to 1/8th microstepping. Grbl settings as suggested on the front page for the OX project. Using grbl v0.9 since v1.1 seems to have a pretty serious Z-travel bug. Vrefs are adjusted as described for the A4988 driver to match the 2.8A motors supplied with the Ooznest kit. Milling depron works like a charm. So far so good!

Problems start when I try to mill 6mm plywood. My X-axis will suddenly and at random "kick" and jump backwards, rendering milled part useless. Never seen it on Y, or Z. The whole stepper kicks reverse with a "dunk", so it does not look like belt slipping on pulley, nor pulley slipping on axle. Heatsinks on the A4988s are not even warm to the touch when this happens, so there should be sufficient cooling.

I think I have tried the obvious:
* belt tension
* reduced acceleration
* re-adjusted Vrefs
* reduced plunge depth (down to 0.5mm/pass)
* reduced feedrate (down to F150)
* tried grbl v1.1

Running out of ideas - so any help greatly appreciated!

T

 

mybe the pulley on motor is slipping?

 

@Darathy - thanks for pitching in!
Took the pulley off, and there's no scuff-marks from a slipping set-screw whatsoever on the stepper axle. 99% confident that's not why it kicks.

Suspecting electrical over mechanical issue...

T

 

I think you may need higher ampage drivers, a4988's have 2A Max current, may not be enough with the motors supplied with our kit.

 

@Giarc:
Shallow as 0.5mm/pass still don't make a difference, at as low as 150mm feedrate.

@Ryan Lock:
Good tip - thanks. I'll try some DRV8825 drivers (same as CNC xPro v3). Hard to see that the additional 0.5A (@2.5A), over the A4988s 2A should make all the difference - but surely willing to try. Apart from this minor hickup - the kit is *excellent*, and very easy to build and set up!

While I await new drivers I'll try another PSU simply to rule that part completely out. Same for some other software.

T

PS: I used some suitably sized cowbar/rollcage/bumper floodlight-fixtures to mount the router to the Z-axis. They came with a squared off bracket and clamps fitting the dia of my router perfectly. Call it a variation over the hose-clamp mount originally shared.

 

thx for the z-axis-limit/homing placement =)
was going to do something more "complicated"...
this saves me much time