Hello Guest it is October 15, 2019, 08:55:13 PM

Author Topic: Slaving over a hot Pod  (Read 19965 times)

0 Members and 1 Guest are viewing this topic.

Offline Greolt

*
  •  956 956
    • View Profile
Slaving over a hot Pod
« on: January 18, 2007, 12:06:11 AM »
 I am building a router that has R&P drive on each side of the X axis.

Although the Y and Z axis are not done the slaving in Mach through LPT has tested well on the completed X

So as Art has released a plugin for the Pod that has slaving I thought I would give it a go  :)

One side of the drive is designated X and the other side A.  Slaving is selected in Mach X to A

Motor tuning is set the same to both drives.  Try to jog. No go. Just acts like it is stalling. (turns slowly, makes a lot of noise)

Tried all sorts of velocity and accelleration settings. Nothing works.

Deselect slaving and X jogs perfectly on its own.

What am I doing wrong. Something stupid I guess.  ;D

Offline Graham Waterworth

*
  • *
  •  1,888 1,888
  • Yorkshire Dales, England
    • View Profile
Re: Slaving over a hot Pod
« Reply #1 on: January 18, 2007, 03:23:58 AM »
Have you got the 2 motors running in the same direction?

Are they mounted mirror style or in parallel?

If mirrored they need to run in opposite directions.

Graham.

Without engineers the world stops

Offline Greolt

*
  •  956 956
    • View Profile
Re: Slaving over a hot Pod
« Reply #2 on: January 18, 2007, 06:10:01 AM »
Motors are set to run in the correct direction. They are not fighting one another.

Being R&P I can simply release the spring that holds the pinion against the rack untill rotation direction is set correct.

Incidently I could not simply toggle "direction low active" to reverse motor direction as you can when using LPT.

Had to physically reverse two motor wires.

Offline Chaoticone

*
  • *
  •  5,607 5,607
  • Precision Chaos
    • View Profile
Re: Slaving over a hot Pod
« Reply #3 on: January 18, 2007, 06:18:58 AM »
Can you swap your motor wires at the drives? Make x=a and a=x. This might help narrow it down. Before you do that, have you tried the a axis with the x axis disabled?


Brett
;D If you could see the things I have in my head, you would be laughing too. ;D

My guard dog is not what you need to worry about!

Offline Greolt

*
  •  956 956
    • View Profile
Re: Slaving over a hot Pod
« Reply #4 on: January 18, 2007, 06:43:34 AM »
Brett

When X and A is slaved together no go. When slaving disabled both axis jog perfectly independantly.

Of course I have disengaged one pinion.

Wire it back up to LPT and slaving works as it should.

Fairly certain it is not a mechanical, driver or motor problem. Just something to do with slaving with the Pod.

Thanks,  Greg

Offline Chaoticone

*
  • *
  •  5,607 5,607
  • Precision Chaos
    • View Profile
Re: Slaving over a hot Pod
« Reply #5 on: January 18, 2007, 06:46:49 AM »
Quote
Of course I have disengaged one pinion.

Wire it back up to LPT and slaving works as it should.

Are you saying all is well with both engaged now?

Brett
;D If you could see the things I have in my head, you would be laughing too. ;D

My guard dog is not what you need to worry about!

Offline Greolt

*
  •  956 956
    • View Profile
Re: Slaving over a hot Pod
« Reply #6 on: January 18, 2007, 06:53:47 AM »
Sorry I think you misunderstood Brett.  I have been trying to get slaving going using the Pod.

LPT works but I only mentioned that to demonstrate that I don't believe it is a mechanical problem.

It is slaving with the Pod that I am posting about.

Offline Chaoticone

*
  • *
  •  5,607 5,607
  • Precision Chaos
    • View Profile
Re: Slaving over a hot Pod
« Reply #7 on: January 18, 2007, 06:57:04 AM »
Your right, I did misunderstand. Sorry about that. Yes, I doubt it is in your setup.

Brett
;D If you could see the things I have in my head, you would be laughing too. ;D

My guard dog is not what you need to worry about!

Offline kookaburra

*
  •  56 56
  • Fussy? Yep! That's Me ;)
    • View Profile
    • Akela Website
Re: Slaving over a hot Pod
« Reply #8 on: January 18, 2007, 02:18:40 PM »
Greolt,

Sounds like there might be a problem with the slaving function. Do me a favour, can you disengage the A axis motor and try to slave X and Y together. If this works, disengage your X axis Motor and re-engage your A axis and slave Y and A together. Let us know the outcome.

On the Motor reversal issue, the place to do that for the POD is in your Homing/Limits in the config not in Ports and Pins. In the table in this section under Home/Limits, the first column will allow you to reverse the motor direction, this works, I had to do it on my machine.

Hope to hear the results soon.

Regards

Dave
"A Helicopter Hovers Above The Ground, Kind Of Like A Brick Doesn't"
"If you think you are under pressure - Try opening a sippy cup on an airoplane - 30,000ft in the air"
Greetings From Down Under
Dave Drain
Akela Noble Technologies Pty. Ltd.

Offline Greolt

*
  •  956 956
    • View Profile
Re: Slaving over a hot Pod
« Reply #9 on: January 18, 2007, 05:08:14 PM »
Dave

Yes that was the right place to reverse motor direction.  Had not noticed that before.  :D

As I said in the first post this half built machine up to now only has two motors, both driving the X from both sides.

However in response to your request I tried those two motors in every combination I could by
plugging them into the Pod as X, Y, Z, A, B. and C

Every time slaving would not work and with slaving deselected each motor would jog perfectly as an individual.

Could it be a noise issue? Wiring is physically separated but not shielded.

As signal should be identical when slaved it would not be a problem. Wouldn't it.  ???

I spose if slaving is working for everyone else then something like that may explain it.