Hi Gary. Its a long time since I did the dual belt, so yes it might have started at that time.
For securing Im using the same methods as without dual belt (nut/bolt). If it was the belt not meshing wouldnt that occur when jogging the machine around too then ? It only does it when moving "freely/from spot to spot" in a job. Maybe I just dont see it when its actually cutting ?

When I put the dual belts in, I just let slightly tightened the upper belt. If I tried to tension it, it would mesh right I felt. I tightened it by moving the motor upwards. How tight should the upper belt be ? THe lower is clued down.

 

I already have soldered it to fast decay, but I didnt notice any difference. So you are saying I should try to solder the other pair instead ?
Like if I have left and middle soldered I should solder mid+right and try that out ?

 

Hmmm... I dont have anything under my lower belts, I thought the double tape was only to hold it down.
Yes it seems like its only under rapid movements. So you are saying I NEED the 0.5mm extra thickness to make the belt mesh right ?
And I dont have any tension end to end, just tightened using the motor.

 

Loctite So I have a bit of work infront of me. Do you have a link to what you used between the belt and the rail ?

And thanks alot for the tip/info!

 

Yeah just tried at the end, seems to come of pretty easily. And of course, I could just flip the extrusion, why didnt I think of that!

 

I will do this later today. Thanks for the tips, I will come back with the result

 

I just checked and I have soldered for fast decay as shown on this picture CNC xPRO V3 Controller Stepper Driver

That should be correct?

 

I bought mine 8 months ago. And it have the same print on the back as the one Gary posted.

Im a bit confused, is it the print on the back that is printed the wrong way? If so then it should always be soldered the same way.

Or is the printing the same but the components are switched around?

 

Thanks Ryan

Have joined the rails together using M3 Bolts and Nyloc nuts. It does increase the stiffness.
The 3mm cutter I use for finishing is an Up-Down Spiral compression bit.

It seems that there is a witness on the plunge (only slight) when it ramps down at 30 deg
The 1st cut on the rough seems to be approx 1.5mm outside the rough profile. The other cuts are fine (3 levels in 9mm mdf) the finishing cut is only .5mm around the cut out therefeore leaving a "step" 3mm deep on the neg X face.

Will try with a 6mm cutter to see if it is a flex in the cutter issue

I have added 2 Idler pulleys on the X Motor mount screws to allow the belt (doubled) to have a larger contact with the G3 Gear. This has had a massive effect, stopping any belt jumping. It doesnt look possible to do the same mod on the Y axis(s)

To anybody else struggling with Cut quality - before you cut anything and the motors are locked, put a small force on each of the x and y axis - if it moves at all, your belts need retensioning! Common sense, but still took me a while to learn!!!!!

 

Tried with a 6mm Straight Cutter. Better result, but it seems the first rough cut is .5mm different in X - the other 3 cuts in the level are good???????

Any more ideas?

 

Evening all...I wonder if anyone can help me..

I have an Ooznest OX. Still havent cut anything with it yet

I have put microswitches at each end of the 3 different axis. They all work, when I click them, they alarm and shut down the machine independently.

But I have noticed some strange behaviour and it wont $H

when I load up I immediately get this MSG: Check Limits. question, is that always the case if you have Hard Limits ON, or is this a problem? I am assuming its an issue, before I start unwiring stuff, I thought I would ask.

Grbl 1.1f ['$' for help]
[MSG:Check Limits]
[MSG:'$H'|'$X' to unlock]
[verbose]<Alarm|MPos:0.000,0.000,0.000|Bf:15,128|FS:0,0|Pn:YZ|WCO:0.000,0.000,-1.000>
[verbose]<Alarm|MPos:0.000,0.000,0.000|Bf:15,128|FS:0,0|Pn:YZ|Ov:100,100,100>
>>> $X

[MSG:Caution: Unlocked]
ok
[verbose]<Idle|MPos:0.000,0.000,0.000|Bf:15,128|FS:0,0|Pn:YZ>
ok

So now its verbose and gone to idle, no alarm??? So does that mean I dont have a hard limits problem?

If I try and $H it alarms immediately...

>>> $H
ALARM:8
ok

I'm not sure what good looks like, or bad looks like, so if anyone can help it would be magic. Ive had wires on and off and done various tests. It does seem seem to be a hard limit alarm, thats cleared when I $X??

All help gratefully received,

Rob

 

Hi Ryan

The tests I have done have not included the finishing cuts as this confuses the result. Only Roughing cuts 0.5 inside profile 3 Levels. Its the first level that is off.

 

I've never had an issue with this. I don't use glue or double sided table, double sided can be a pain to remove and so can superglue. Super glue also give up at low temps. I just used knock down fittings to tension both belts.

 

XBEE on CNC XPro guide..

Look what I stumbled on, not wanting to pay a lot of money for a blue tooth module I ordered an XBEE. When looking for a clear instruction on how to solder the jumpers etc.. I found this.

Setting up RN-42XV Bluetooth and RN-XV Wifi XBee format modules on SparkFun's FioV3 Arduino board.

 

Nevermind.. As I've said I tensioned both belts, it works