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Topics - XLR84x4

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1
General Mach Discussion / Tangental Cutter problem!
« on: September 16, 2009, 06:38:05 AM »
My Fabric sutter is having some issues.

It is a 2.5D pnuematic Z axis with tangental A axis.

The problem is that after a cut the trajectory planner starts to rotate the knife for the next move before the Z Axis has lifted. Iam using a Z Gcode  of -200 to +200 with a feed rate of F10000. This is to provide time for the Z to go down prior to a cut and the same for the lift

Watching the gcode running once the cut is complete and the code is calling for +200 and before it reaches 0 where the Z should lift, the A axis is rotating to a postion for the next cut.

I have attached a short video of the problem http://www.youtube.com/watch?v=6stJyMRDmkc

2
SmoothStepper USB / Velocity FIFO Ran Dry
« on: December 16, 2008, 05:42:38 AM »
Like the title says

What does it mean when this is flagged in SS monitoring??

3
General Mach Discussion / A axis speed limiting in Tangential Mode
« on: December 01, 2008, 06:00:08 AM »
Hi All,

Ok I have been tuning my fabric cutting table to get the most from it in terms of speed.

As the A axis has to rotate first to align to the x-y trajectory it is the speed of this A move that dictates the overall speed of the machine. I have wound up my A axis Velocity and accell values to the point where it is loosing steps at best I can acheive a feedrate of 6000mm/min cutting air

So what to do is the question. The A axis only has to move a few degree's at a time however it has to do it fast.

My A axis steps/deg is 5.55555 this is worked out as 2000/360 deg and my vel/acc is currently 15000 and 15000. which is where it starts to loose a few degress over the period of a large file run.

Also the machine runs it best/smoothest n Plasma Mode with G64 on but no CV settings ticked

Should I start to look for a servo??
Jason


4
General Mach Discussion / What was upgraded in R3.042.015
« on: October 25, 2008, 09:43:55 PM »
I can seem to find what bug fixes were done in version R3.042.015n

Iam hoping that CV for tangential axis has been implemented.

Jason

5
SmoothStepper USB / Reference Axis???
« on: June 25, 2008, 03:24:29 AM »
Ok,

I beleive that Iam not the only one with referencing the Axises to home kind of problems using the SS. The motors seem to jog a little and the DRO's jumps around but in all there is no travel to home with the DRO's zeroing

Has anyone fixed this problem one there own or are we waiting for a plugin fix??

6
General Mach Discussion / Tangental control can it be better???
« on: June 23, 2008, 01:09:20 AM »
My Smooth Stepper is running my machine like it's on steroids.

The only problem is when I select tangental mode it switched to exact stop and with the feed rate I'm running turns itself into a butter making machine shaking it's feet off.

I would really like to have this tangental exact stop bug sorted out so I can run the machine it's been designed for.

If there are sme programers/moderators that can help out in this area I would ike to hear from you.

Here is a link to a average video I shot with my phone. The first part is with tangential off running 10000mm/min. See how smooth it is. The end part is with tangenial on. Same feed but due to code problems feed rate is reduce to 3000mm/min and it shakes it ass off.

I really want to run the A axis cutter in CV mode and get the A tangentai code that mach is sending out working.

Is it that the tangental A axis code that Mach generates is on a on new line ??

Here is a video
http://www.youtube.com/watch?v=qDdijboi_LEhttp://

Looking forward to getting this sorted

Jason

7
SmoothStepper USB / Which BOB for the smooth stepper
« on: June 03, 2008, 12:58:26 AM »
I have been struggling with the GREX so it's tie to give it the flick.

Which bob can someone suggest. I wish to run high feed rates of +5000mm/min on a material cutting table using a tangential knifeJason

8
General Mach Discussion / Grex + printer port for MPG
« on: May 27, 2008, 06:12:50 AM »
Firstly,
thanks all for the previous help. I'm just getting back to the machine for the trials.

My question is I am using a Grex and have myself a remote MPG pendant from CNC4PC.

On the config side. I wish to plug the MPG pendant into the printer port and use Mach via ethernet. I'm just trying to get my head around the ports/pins settings to use both via different ports.  Any advice

Thanks
Jason

9
General Mach Discussion / Hot stepper Motor
« on: May 03, 2008, 01:03:44 AM »
I have a Vextra PV264-02BA on a A axis to rotate a tangential knife using the tangential control feature in Mach3 and 2.5D to control the Z axis. I have fitted a thrust bearing between the cutter and the stepper so that when the z axis is lowered into the cutting postion it does not put any axial load on the stepper.

My problem is that the stepper is hot to touch even when idle. An when I run a large file the A axis looses steps and ends up dragging the knife around. When in tangential mode the system runs in exact stop meaning that the A axis has to complete the move prior to the X-Y axis moving. This is the limitation of Mach3 tangential control

I have lowered my motor tuning to 5000m/min with accel of 800m/s/s with units set at 5.555555555 and it stil looses steps on the A. I have even run the gcode with out the knife attached ie cutting air and it still looses steps. We are talking 2-8 deg at the end of the program cycle. Some times I have to stop the program re-reference the A axis to stop the problem of the knie getting dragged around the table

THe stepper is wired bipolar to a gecko and I have limited the current to 2A with a voltage of 56VDC. I did have a cheapy stepper doing the same thing that I replaced with the Vextra

Any thoughts on the hot stepper problems.


Thanks
Jason

10
General Mach Discussion / 360 deg A Axis homing using an encoder
« on: March 05, 2008, 08:59:57 PM »
I have a tangential cutting machine with the A axis stepper motor rotating a pizza wheel.

I wish to install a Encoder on the A axis so I can reference this axis to a home 0deg position using the encoder as position feedback

I imagine setting up a DRO for the Axis is the way to go??? or are there other solutions??

I did read some where that Gecko may be building a closed loop stepper drive

Has any one elso installed encoders on a rotating A axis with stepper for monitoring postion??

Cheers
Jason

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