Author Topic: 4th axis is slowing X, Y, and Z  (Read 6763 times)

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Offline Haik

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Re: 4th axis is slowing X, Y, and Z
« Reply #10 on: July 08, 2007, 06:01:31 PM »
Here's my XML... Thanks!!!

Offline ART

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Re: 4th axis is slowing X, Y, and Z
« Reply #11 on: July 08, 2007, 09:37:16 PM »
Hi Brett:

  I have his Gcode and am runnign a test here as well..

Art


Offline Chaoticone

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Re: 4th axis is slowing X, Y, and Z
« Reply #12 on: July 08, 2007, 09:41:48 PM »
Thanks Art.

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

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Offline Chip

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Re: 4th axis is slowing X, Y, and Z
« Reply #13 on: July 09, 2007, 12:38:27 AM »
Hi, Halk

Edit:-------------Halk this file below doesn't have any blended moves, I'll post one Later today ---------------!!

In my experience with 4th axis (using P-port hear) think your using G-rex, Anyway the limiting factor is the 4th axis speed for blended moves.

Pump it up as fast as you can in Vel. and Accel., Without losing steps, With 10 Micro-steps it's allot of steps compared to you other axis's.

I am using a sherline rotary table some 144,072 steps 360 deg. 1 full turn, ( set at 1 deg. 400.2 steps) 10 micro-step also vel 2500 accl 500.

A 1, 1/2, 5, 10 selectable cont. would speed it up using the 1 or 1/2 mode would speed it up.

Once you factor in the rotational Dia., I think you'll find it's OK, What's your planed use.

Try below file, 2.0 inch A dia. F25 may want to set it up or over ride speed

Thanks, Chip
« Last Edit: July 09, 2007, 01:45:08 AM by afn09556 »

Offline Haik

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Re: 4th axis is slowing X, Y, and Z
« Reply #14 on: July 09, 2007, 01:38:30 AM »
Will do on topping-out the Vel and Accl... I've already expeienced stalling and on a 4-stack/1300oz-in NEMA 34 @ 80vdc I gotta say it sounds ugly. :-(

GREAT NEWS is Art made a change for me that fixed the "crawling" problem I was having. 4 Axis code now runs as fast as my steppers allow! I do need to use high F values, but I've heard of others having to do that and since that's such a small thing... "no problem."

Also... My "THANKS" Bret, Gianni, and you for helping me out!

Oh, by the way... I'm making balusters and other turned parts. In my pic you might notice I have Perske spindles (on VFD, RPMs/Frequency controlled by Mach3), 1 verticle and 1 horizontal. G100 and 5 G203V's round out the control.

And Art, again, THANK YOU!!!
« Last Edit: July 09, 2007, 01:45:26 AM by hbaba »

Offline Chaoticone

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Re: 4th axis is slowing X, Y, and Z
« Reply #15 on: July 09, 2007, 05:58:13 AM »
Good deal Haik, I'm glad you are sorted.

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 Chip

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Re: 4th axis is slowing X, Y, and Z
« Reply #16 on: July 09, 2007, 08:46:03 PM »
Hi, Halk

Glad your working now what did it take to fix it. ?

Give this file a try, Got side-tracked today.

Thanks, Chip

Offline Brian Barker

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Re: 4th axis is slowing X, Y, and Z
« Reply #17 on: July 09, 2007, 09:57:56 PM »
It was a problem with How the G100 was getting the velocity and how Mach3 likes to have the velocity.... It is nothing that he could have fixed but it should be good to go now :)
Fixing problems one post at a time ;)

www.newfangledsolutions.com
www.machsupport.com

Offline Chip

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Re: 4th axis is slowing X, Y, and Z
« Reply #18 on: July 09, 2007, 10:48:57 PM »
Thanks, Brian

Chip

Offline Haik

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Re: 4th axis is slowing X, Y, and Z
« Reply #19 on: July 10, 2007, 01:10:13 AM »
Yes, it's as Brian explained... for almost a week I tried everything before contacting Art.  Nothing I tried ever put a dent in the problem... but Art stuck to it and found the problem and fixed it.  I'll bet many users will benefit with this fix in place!

-Haik