Thanks Gary for catching that. I was just about to order that extrusion today. In that case, I will not have extrusion left over to build my acro, but no problem, I can just order more.

Also, thank you David for the information on the arduinos. I bought a few thinking my son was going to get into robotics, but he never did, so I might as well put them to use.

 

So because of Paypal delaying the funding of my account, I was not able to order my extrusion until a few days later and what do you know, free shipping. Now I have everything inbound and hopefully will have enough here to start building this weekend. Now that brings me to another question. Do I really need an Acro? Since this machine will do pretty good resolution and is as big or bigger than the acro I was planning, would I be better off just mounting the laser on the Ox? What would the benefit be for a stand alone laser as opposed to using the Ox?

On a more technical question. Either way, I would like to build a 4th axis jig to allow me to route or laser round objects. If I do use the Ox to do my lasering, would I be better off using two arduinos to switch between the laser setup and the router or just reprogram the one controller? Secondly, I would love to do my own laser inlay kits for pens which would entail cutting two tubes of wood with a pattern through one side. This would be to allow the interchange for the two pieces for contrasting woods.My question is what could I use as a center to prevent the laser from cutting through to the other side of the tube, prevent reflection of the laser, and be economical enough to be disposable? Or maybe I should be asking this on the laser forum.

 

guys i need some help . I have build a 1,5m x 1m ox use it for a while ( basically playing and fooling around) but there is something in the movement at both belt axis ( x and y) that i cant understand and doesn't seem right . It kinds of kick while moves ( it is like a small jump or a kick to unknown direction sorry but even this is difficult to identify) and i dont know where to look.

Everything was smooth enough ( all v-wheels have been left with some tension) so i cant understand what may be the cause. I inspected the wheells the belts the pinion the stifness ( if there is any ) and all seem in normal condition.

I am starting to think it is a software problem ( mach3 settings) . but even there i dont what to look for.

I can post some photos but i don't know what to shoot.

any tip would be big help,
Pavlos

 

what do you mean dual belts i am having one on every side ( two steppers).
Today in the morning everything was running fine. yesterday the spindle was sounded strange too. today i got smoke from the vfd . i don't know if all these are related but yesterday that i have notice the movement problem the spindle had a period drop of rpm .

at this time the steppers are running fine but the vfd is out of order.

last news is all running fine. i saw i have the 35000Hz in kernel speed. change it to 25000 and now i am getting moves without a "jump"

 

Lessons learned so far. The Chinese screw sets sold as being for the Ox are not low profile, so they may cause clearance problems. In my case, I had to add 1/8" spacers to allow for clearing the heads (replacement low profile screws have been ordered to replace these and remove the spacers). The plates I purchased are a little thicker than those in the plans, so I ended up having to reorder screws adding 5mm to many of them to allow for the extra thickness of the plates. Also, take your time and hand tap. I know many videos show people using a drill and a drill/tap, but after breaking one, I switched to hand tapping and had no issues afterwards. Thankfully the hole with the tap stuck in it is on the Z axis, so I can get away with two screws to attach the plate instead of three.

I also found out there is a huge difference in sizes of 270 oz NEMA 23's. I had three from a prior attempt at a build, but needed a forth for this build. The one I received was much smaller than my other ones even though they have the same 270 oz rating. I will be using the odd smaller one for the Z axis.

Hopefully I can get the machine fully built by this weekend leaving only the electrical and computer stuff to finish off. Wish me luck.

 

guys i need an idea on where to mount a microswitch for the zaxis. during the two months i have this build i couldn't find a solution so every idea would be usefull..!

 

Limit switches are comprised of two parts. The switch itself and an actuator. Install the limit switches on the alu plate and the actuator/lever on the 20x60 that holds the spindle.

 

Hello everyone!
I like build work area 1000x2000, because only give this size (steel, aluminium). Possible modify in the OX calculator and great work machine? Or need more any componens?
P.S.: The OX calculator only 1500 can! :-(
Big thanks!
Regards!

 

Hola, voy a montar este CNC (Router CNC de código abierto OpenBuilds OX) pero no sé que motores se necesitan gracias

 

Hi
I’m using an ox 1m x 1m with c beam ball screw driven z axis
At present it has a Makita router fitted.
The limited range of collets sizes is a pain in the backside.
I’d like to fit a ER collet router that is air cooled.
Has anyone any advice or experience of fitting these type of spindles to a c beam Z axis.
Any recommendations for an ER collet type spindle.
Cheers

 

I've looked at the Elaire website and I can't find a 5mm collet for the Makita
I think I've sourced the other sizes I need but I'm drawing a blank on the 5mm.
I really need to drill 5mm for m6 holes
if I can find a 5mm solution then the Makita can stay.

 

The 3/16" collet is very close to 5mm and those bits are a dime a dozen shipped from China.

 

Has anyone cut HDPE or polypropylene sheet with an ox?
15mm thick,
I’m looking for recommendations for depth of cut and feeds and speeds. I’m using a 6mm end mill.
I’m getting steps on one edge which I need to work out how to stop this from happening.

 

Aluminum cut piece looks good and all done on the OX !!! Great !!!
You say that you cut steel as well ?? What accuracy did you get on that ? flexing and all that !
I am looking at getting the WorkBee that has C-beams and thus hopefully a lot more sturdy so that bodes well for aluminum milling !
I like your aluminium table. Looks great. Could you tell me what is behind the design of this and how you intend to make use of it ?

 

hi

does the xPRO V3 , work with mastercam ?

i try many times but when i use mastercam and generated the gcode, the cnc get crazy

 

guys i need some help . i replaced my x axis belt with a leadscrew 10x3 ( 3 pitch 3 lead ) . i set the steps per second at 666.6666666667 ( is this a bad number ?) . Anyway i am getting an error that the speed is too high for the kernel speed so i am lowering my speeds way down but then it gets too slow.

am i missing something here?