I re checked that the machine has plenty of free movement. It does. However, I did notice I lost both of the set screws for the X axis pulley. Luckily, I had extras and replaced them. Maybe that was the problem. I'll try cutting a new sign tomorrow.

 

Sorry, I'm not sure I understand what your asking for. I thought I did send you the actual VCarve file.

 

????

 

in vcarve, instead of exporting out the gcode, save the file instead. File > Save method.
It may have been your set screw that was missing.
I had this problem before, too, where everything was going great, but at one part it always messed up, I saw that the set screw holding the gear to the motor was gone and it was slipping at that spot, put in a new set screw and the problem went away.

Because seeing that slippage on the right side, looked like it was skipping somewhere.

On to something else.
I opened up both files

And there was something odd happening. It wasnt matching up.

which file did you actually use in Mach? Grandpaws Sign or V-Carve 1-tp?

 

Could be that your work table is not level (i.e. it is not parallel with your X axis and / or your Y axis movement). One way of correcting for this is to fit a 'spoil board' to your work table then use the machine to 'surface' the 'spoil board' - you will then have a level work surface for you VCarving, the depth of cut will be equal at both ends of the work and hopefully it will prevent the skipping (motor stalling) that you are getting.
Alternately, could be that your Velocity's and Acceleration's are set too high and this is causing your motors to skip steps - perhaps a bit of experimentation is needed to identify the problem ?

Tweakie.

 

Thank you. That took care of one of my problems.

 

Problems solved. Table (spoil board) was not level and I was missing both set screws from the X axis pulley. I re cut the sign and it came out much better. But wow, all the dust!

 

Shop vac is a must and if milling MDF I would suggest a face mask

 

Just ordered a 1/4" to 1/8" reduction bushing. Now I can use my Dremel bits in my Porter Cable trim router. If anyone else is looking for one, I found it here. http://www.amazon.com/dp/B001NI6KO8/ref=pe_385040_30332200_TE_item

 

Has anyone built a hood or enclosure for their OX? I'm playing with the idea.

 

My Ox is built and ready to calibrate, I'm running LinuxCnc and am looking for the values I need to enter in the Stepper setup. I'm using the GT3 Pulleys (20) and belt. I'm sure there is an easy way to do the math to get my "rev / in" to enter in the leadscrew value, if there is can someone post it. I'm getting close by trial and error but would really like to see the math.

 

I worked it by using the below method

motor steps x drive micro stepping/pitch of the belt x # of pulley teeth

200*10/2*20=33.33 Steps per in mach3

Does this mean that the above system has a resolution of 0.03mm?

 

My OX first run!

https://www.facebook.com/video.php?v=10152558555828623

There is another link for it too:
http://s597.photobucket.com/user/dddman_69/media/20140612_2312251_zpsd3073052.mp4.html

 

Your video doesn't show up

 

I've added a photobucket link too. Maybe Facebook videos are blocked from where you are?

 

Photobucket Video worked and looks great!
Like the drag chain placement
Awesome seeing my plates
Nice work
The last of my electronics came in so hopefully I will be running soon

 

I have a steel cabinet that I am considering mounting the OX to. I am hoping to add rigidity. Does anyone have any experience with mounting the OX to a table? How did it work out?

 

I found this calculator under resources for the OX. Perhaps you could use it to check your math. http://www.openbuilds.com/resources/joseph-prusas-reprap-calculators.3/

 

So, I decided I was going to use the 1500mm beams for the X and Y so I would have about 4ft x 4ft cuttable area. After assembling it and looking at it for a few days I'm starting to rethink that. Ultimately I want a machine that can do full sheet material (4x8) but I'm thinking the OX might be better in the smaller size.

Thoughts? Suggestions?

 

I was able to get to this point myself, the real question is how do you get to the rev/in that LinuxCnc needs, not steps per revolution. I could measure it by moving the axis 1" and measuring the degrees that the pulley turns and do the math but I don't have an accurate way to measure the degree of rotation.

 

Try dividing 1" by the calculated mean circumference. Pretty sure that will give you rev/inch

 

I believe the PD for the pulley is 0.7517", so the circumference is 2.361"

Rev/inch = 0.423

 

I'm going for the full 1500 mm X axis but half in Y with the same hopes of potentially working 4' x however long I can get a table to hold and slide the work piece through. Of course, we both then have to figure out how to line up our work piece between 2 or, in your case, 4 feet sections not to introduce visible alignment problems.

I've got the frame ("part I") just about done, if not for a handfull of missing t-nuts. The two pieces of v-slot to hold the work surface/table are currently on shelf. In looking at the frame, and planning to eventually open at least the center of the work area for "deeper" work pieces, I'll order an extra length or two of v-slot while ordering the t-nuts and start preparing for what will be the well for a "manual" forth axis of some kind ...