i feel like an idiot i totally for got about the acceleration. that seems like it will fix my problem since when im jogging the machine im telling myself why is it so slow to start moving. It has been a long time since i have had to do this since i have been running mach 3 for close to 5 years with no issue

 

Thats and Idea Andrew, stowage on the wall whilst not in use may overcome the vertical issues. best of both worlds. Will bear it in mind thanks.

 

Thanks Peter, will add that to my reading list.

 

Thakns Rick...Point taken, much appreciated..

 

Hello guys. I need a tip on who can help, maybe someone has already asked but it is a lot to read. My Ox has nema 23 motors 12.6kg driver 1/8 of a step, if someone has a similar configuration they could pass feed-rate and how many mm of vertical and horizontal step (Ap and Ae) for a milling cutter, for example, 3mm.

 

Feed-rates totally depend on what your cutting, what finish you want, bit size.. it is incredibly variable... FWIW, I'm looking into getting Gwizard exactly to be able to get the optimized feed rates and spindle speeds as per material, bit and finish I want...
step/mm depends on pulley size, but OpenBUilds Control has a step/mm wizard.. basically you send a movement, say 100mm, then measure exactly how far it did move, then make the calc if it is off and substitute your values until they are correct ;-)

 

Hi @Mark Carew & @Peter Van Der Walt (and others!),

I've decided on building an 750x750mm OX as it is extendable much easier than a leadscrew rig ;-) Will be trying the double belt as in Buffalo and SS OX... ;-) Unless you have better suggestions for a belt driven CNC..? Although it is old, it seems a pretty good and solid build - will mainly be cutting wood, but will hopefully extend to max size in X (1500mm) and double Y (3000mm) in the future... (I am planning on adding some adjustable feet at the union between profiles, anyone done this already so I don't have to design from scratch?)

Couple of questions..

what advantage does the taller Z-plate give..? I have done the build in Fusion 360 (will share when finished!), and I notice that with the higher Z-plate, one actually gets less Z movement, as the upper lead screw motor bracket hits the higher edge of the Z-plate earlier..? Can just use a longer 20x60 and leadscrew, but curious if there is a better reason to use than being able to use 4 sets of wheel pairs instead of 3..? To get a bit more height (only wish about 40mm more), I was going to adjust the corresponding holes and edges on the Y-plates...

Also, I see in the notes the comment that the Nema 17 is pretty near the limit, so I was thinking of a Nema 23 for Z, but the mounting plate for Nema23 is made for 20x80, and extends slightly to far "north" (there exists the possibility it may crash with the X-axis motor pulley if manages to lower enough - however I think it may first encounter problems with the router crashing with the work area before this happens - not quite got the router and spoiler board drawn out yet in Fusion, so still not sure..) - if it turns out to be a thing, was thinking of simply grinding off the offending couple of mms of the bracket, but that is still up in the air ;-) Could just use a 60mm Nema17 which would have about 20% more holding torque...

And in the video show using a 20x40 on the rear of the X-axis, but BoM shows 3x 20x60..? any real difference?

And any idea when your Interface will be back in stock..? It is the crowning glory to an independant build, I generally use my laptop with the BlackBox, and I always have to check for battery beforehand, or find my charger, so having this part an parcel I think is a really great move ;-)

Thanks a lot and keep up the good work, love the v-slot system and the openbuilds projects ;-)

Cheers!
Andy


PD, sorry, I haven't looked thru the 122 pages of this discussion to see if this has already been asked, so please excuse me in advance if it has!!

 

Of course! Shallow depths always, but I am hoping to do some 3D carving up to 8-9cm deep, so need some more headroom ;-) By the way, longer bits.. what would you recommend?

Yeah, that threaded plate is what I have in Fusion at the moment, and it may be a problem... but can always modify ;-)

OK, although I imagine 20x60 would work, only maybe could cause problems with the drag chain.. (too closed a radius may bring it too high)? I will be putting PSU and BB underneath front left/right corner, beneath spoilboard, and the Interface as shown in the video of first cut, hanging off a magnet just in front, so will be routing all wires thru the v-slot where possible, and thru v-slot channels where not possible to pass straight thru (except needed lengths of dragchain to allow axis movement)

Great!

 

PD by the way, it would be great to have your latest products in Grabcad as step files... the skp files import to Fusion as STLs, and aren't very convenient for that app.. FWIW!! ;-)

(BB, RoutER11, Interface, XYZ probe, etc)

 

Unfortunately, when importing a .SKP the final BODY part is a STL mesh, not a solid, so the mesh cannot be manipulated like a solid (as well as looking ugly)... a .STEP would always be preferred! ;-)
JM2C ;-)

 

But you still end up with a body that is comprised of many triangles. You now have to try to erase them, not always successful, in order to be able to properly work on it.

 

I built the small OX, but cant figure out how to mount the Z limit in a good place of neatly. I am using the open builds extreme limit. anyone have a good solution & possibly a picture.

 

Hi guys,

I've got my first CNC machine on the weekend. I am totally new in this league. it has been quite a long week for me to study, understand and deal with it. Could you guys help me to sort out with couple of issues I'm having? Btw I still wasn't able to move the router yet

It came with one cable broken side of the rack, and a couple of cables were out from the CNC shield as well!

thanks

 

Hi David,

Many thanks for the prompt reply. Look like I have a power supply, Arduino, and CNC shield install already! I am not sure I need a BlackBox motion controller.

what do you think?

 

Basically, get rid of the Arduino CNC shield and replace it with Blackbox, and don't worry about the rest?

 

I followed your suggestion and upgrade CNC Shield and Power Supply. Replace CNC shield with xPro-V5, and upgrade power supply with 24V 350W

Power Supply - 24V 350W - Maker Store PTY LTD
xPRO V5 Motion Control System - Maker Store PTY LTD

It was quite easy to connect stepper motors to "xPro-V5" but I am struggling wiring "Limit Switchers" which there are 6 switchers install in my ox table x+, x-, y+ ,y-, z+, z- but there are only 3 connection in xPro-v5.

here is the xpro connection

electronics:elec-scxprov5-regular-microswitches.jpg [Maker Hardware]

 

I can't thank enough makerstore.com.au they have been very helpful. In case if anyone needs it in the future, I've uploaded the wiring schematic
Wish me luck with the wiring, I hope this is gonna work.

 

I just notice that one micro switch limiter is broken, what happen if machine operate with one switcher broken?

 

I think the link is broken, not directing to website