Thanks for that - very helpful seeing the picture.

 

Muxa

Did you solve the issue? I have something similar when the X axis is close to the Y on the LH side. Y seems to "lag" - all seems to be fine in the middle of the table (But it wouldnt be as noticable there anyway) I have a 1500x1500 OX, runninfg Mach 3 through smoothstepper.

Cheers

 

What Cutter are you using? Compression Spiral? Straight Flute?.
Are you using Leads or ramps?
What are the recommended feeds and speeds for the cutter (or Chipload)

Is the Cutter getting HOT - Should be warm

Marcus

 

Hi all

Im facing a problem that when I do a face operation the x-axis suddenly stop moving, just vibrates, and then move ind the other direction. Each time making the piece kind of useless. See the attached picture.
I dont seem to have this problem when doing other operations.

Im running at F1500 with 1mm cut and the materials are plywood.

Any ideas is greatly appreciated.

Regards
Bjorn

 

Bjorn

Sounds like a motor tuning issue. What are you using to drive the motors and what software (ie Mach).
In Mach there is a Pulse and Step width setting that you can use

 

Loosening the wheels made no difference, Tightening the belt made no difference. It must be a mechanical issue when the X is all the way to the left HS of the table. Dont know quite what yet. Any ideas appreciated.

On a lighter note - Vacuum table to be tested tomorrow
Set up is - 3Depths of 5.5 mm ply Bottom Solid, Middle some spacers, top drilled with 2mm drill 10x10 all over. sanwiched and edges sealed with Gaffer tape. Two Vacuum entries via spigots created on 3D printer. Vacuum motors (2 Off) are AIRFLIX STORM Vacuum motor Lamb Ametek 2 Stage .

Spoilboard is 12mm MDF LIte with sealed edges

Initial testing - Hold is GGGGGOOOOOOODDDD

Will update when I have cut a part or two

Marcus

 

Hi Marcus

Im using Fusion 360 to generated the model and gcode. Then using ugs to control the CNC vPro v3 controller.

 

Hi Ryan

I can make like an hour milling without any issues. But if I start the face operation then after like five minutes this often happens. Not all the time though.

 

Sorry, dont know anything about that SW. If the "Jitter" is not present in the G Code (have you run a simulation) then it seems to me that the motors are not getting the correct direction pulse width. Although if it works normally on other operations, this is not likely.

Can you post me the Gcode and I will simulate?

 

Here's an update on the "lag" issue when swapping direction of movement on the X axis (looses about 0.5mm).
The issue is not the motor (i've swapped X and Z axis motors).
The issue is not Grbl version (i've restored to 0.9j which worked fine before, from 1.1f).
The issue is not the double belt (i've gone back from double belt to single belt on X axis).
I don't think it's the belts or the pulley wheel, because this setup worked fine before (i've made sure the pulley wheel is rigidly attached to the shaft of the motor).
So i think the issue is in xPro board. The "lag" is about 0.5mm on X axis, and on the Y axis it's 0.2mm. It's apparent when routing small holes - they end up being oval (narrower in X axis). Each axis is calibrated. This issue only occurred a few weeks ago.
I'll try one more thing though: add extra idler wheels on the X gantry to increase the surface area for the timing belt on X pullet wheel.

 

Hi Marcus

Sorry for the late reply.... easter time

Here is the gcode. But Im pretty sure it has nothing to do with it, since it sometimes runs fine.

 

Hoping to get my kit this week

Any recommendations of where to get cnc router bits?

Thanks,

 

Bjorn= You are right the code seems fine. Best take Ryans advice and cut down the cut depth see if that make s any difference.

 

Hi Guys,

Complete novice when it comes to the world of CNC but just started a business up and we require one so just ordered the full Ox Kit.

I will be mainly working with MDF (3mm to 25mm) and was looking for some hints/tips and guidance with regards to best software to use, bits, speeds etc. I've trawled through a lot of post but some of it may as well be written in another language.

I'm currently using inkscape for my design stuff as it's pretty simple to use. Would I be able to carry on with this and convert files to CNC files??

Any help would be greatly appreciated!!

Cheers

John

 

What sort of business and where are you based, may be a collaboration opportunity

 

I'm up in Liverpool pal and it's for the wifes craft business.

 

Getting soooo close to starting this baby up, All that's left is the belts, VFD, Spoiler board and Limit switches. Still have to wire my house for 220v for the VFD but that should be done in the next week or 2. I must say it's been super fun to build. The yellow parts you see are the 3D printed belt tensioners and Drag chain holders.

 

Hi Ryan,

Many thanks for your reply. I looked around a lot before deciding to go with you guys and you stood out a mile from the competition!! So easy choice!!

If i was to go with a CAM program which would be the easiest to navigate and pick up fairly quickly in your opinion? Really would like to hit the ground running once the machine is built.

As for the flutes, some of the work will be fairly simple but some of it can be quite intricate? I was also wondering if i would use the same bits for engraving??

You mention 1200mm/min, would that be for the full range of thicknesses?!

I also forgot to mention I will also be working with acrylic so any recommendations for that would be great too!!

Cheers

John

 

Funny you say this as it was my initial plan (as we don't use it anyways) and I have the socket extension already lol . Its just not as conveniently located as I would like it to be.

 

Personally I'll be using Fusion360 with Mach3, i'm sure Fusion360 should work in your setup as well. Best thing about Fusion360 is that's it's free for hobbyists

 

Cheers PCMODS,

I will download that this weekend and have a play. Am i right in thinking my bits are to have 1/4 shanks?!

Cheers

John

 

Hi Ryan, thanks for that. What sort of bit are good for engraving wood/acrylic?

Cheers

John