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Messages - sparky3

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Mach4 General Discussion / Re: Back lash comp while jogging
« on: April 27, 2017, 11:13:05 PM »
Hi Mauri.

Yes i understand all of that. The machine has 5mm ball screws, servo are 10,000 pules per revolution, 50800 steps per inch, the machine does move .0001inch no problems just no backlash comp while doing so.
this has been tested with MPG plugged into the  interface on the hicon7766, the Modbus mpg, the Mach4 jog screen, and MDI.  
I know it always best to remove all the backlash out of the mechanics first. I work on Commercial machines for a living and my poor Novakon is just not in the same class. It has .0009 inch backlash in Y, it had .0015 in it to begin with.
while checking the bearings on the Y axis, the preload got set a little to tight and ruined that set, Replaced them with 7004 P4 ABEC7 from NSK, checked the bearing block and found some bad machining on the bearing bores and corrected that.
that made up for about 6thents of movement. All that can be take out with out machining, scraping, and upgrading ball screw and bearings has been done.  So it is at .0009 and is with in spec for Novakon.

Made a new discovery about backlash comp on the Hicon last night. I think it is just a bug in the Firmware and can be corrected
It will comp when moving in thousandths all day long, or so I thought, every now and then it will not apply the comp to the move at all.
Learned this while running a backlash test for repeat ability last night, ninth run of the program it did not return to the same spot, then again on the 12th run of the program.
started watching the diagnostics  page while running the program and checking encoder/ step gen. to the first touch and the last touch, when the part was first touched encoder/step gen was 238386 move off the part past zero then back to zero the encoder/step gen was 238343, this is the base with backlash working.
when backlash was skipped by the by the controller both numbers were 238386.  It happened several more times 5 out of 21 runs of the program.

I am send the guys at Vital System a email to see what else they need to test. Still not sure if this is a Hicon issue or a Mach4 issue, or a set up issue. But i will add this to the backlash not comping on .0001 moves with the MPG or jog screens

I will report back when I hear something from them.

explanation on steps per unit is great and should be posted saved some where for the less experienced
the hicon will do the math for backlash for you, in this set up when .0009 is entered it rounded it down to .00088??? don't remember off the top of my head did not write it down probably should have. so it will round it up a pulse or down a pulse depending on the move.
I do love the Hicon, this one is set up with encoder feedback and using home switched and index for homing. it is just great you can indicate a part in set the zeros, shut it all down,  leave the indicator set up where it is at, Turn it all back on reference it hit the goto zero button, and it is on the money indicator is back at zero.  

Mach4 General Discussion / Re: Back lash comp while jogging
« on: April 26, 2017, 12:37:11 AM »
I will pose the question down there. it works while jogging but wont compensate for .0001 moves. only .001 and .01 moves.
Now that I think about it I have not tried .0001 moves with the MDI. I will try that tomorrow then pose the question.

Mach4 General Discussion / Back lash comp while jogging
« on: April 20, 2017, 11:20:49 PM »
Is backlash comp while jogging an Mach4 thing or a plugin thing?
Have a Hicon Intergra, the backlash is set in the Plugin.
But it does not apply backlash comp using the screen jogging controls, or MPG.

Thank you

Mach4 General Discussion / Re: Arduino, Mach4 and ModbusIP.
« on: April 08, 2016, 12:15:24 AM »
I have been playing with this. Did you have to uncomment the #define TCP_KEEP_ALIVE in ModbusIP.h folder to keep it running?
Polling it did not work for me.

Thank you
R. Clark

dspMC/IP Motion Controller / Re: DSP/MC difference
« on: November 09, 2011, 08:48:41 PM »
Hiconn sounds interesting.  have any idea of when we will get details?

Mach3 and G-Rex / Re: no ip on rex
« on: April 09, 2006, 10:52:52 AM »
sounds like it has a DLM problem if it is going to run mode on it's own.  call gecko monday.

Mach3 and G-Rex / Re: no ip on rex
« on: April 09, 2006, 12:17:58 AM »
i had the same problem.  first question new out of the box grex.  when you plug in the power cable to the grex do you get one red light on each axis and all of the outputs 1 through 16 should have a red lights?  with no firmware loaded it should stay that way untill firmware is loaded and the and the auto-boot DLM is set to above 3 seconds default setting on mine was zero "out of the box". 
if the grex lights up red and after a few seconds the red lights go out and the run light comes on then there may be a problem with the auto-boot DLM. i am assuming this is a new out of the box grex and this is the first time trying to use it right? if not and you have gotten it to talk with the computer before then disregard.  other wise give gecko a call, i had to send the rabbitcore back to be reloaded there was a problem with one of the new programs they were trying and basicly the grex would boot on it's own and wouldn't allow access to it.  when i got it back, i put it back together ,hooked it up through the home network and every thing was fine.  when i talked to mariss at gecko he said mine was the third one with the problem and i think i ordered mine march 18th.  they discovered that little bug around the same time i called on the 22 of march.

Mach3 and G-Rex / Re: Maping I/O on G100?
« on: April 07, 2006, 12:19:45 AM »
i think it's port 0 then input pin number for version .10, and it's port 1 then input pin number for version.25 and later.  it took me awile but art mentioned it on the yahoo group it was changed to support mod-io board.

General Mach Discussion / Re: Strange Things Occur
« on: February 23, 2006, 05:35:19 PM »
right now i am using 470 ohm right now from +5 volts through the resistor to the input

General Mach Discussion / Re: Strange Things Occur
« on: February 22, 2006, 05:48:21 PM »
you may have to put pullup resistors on the break out board at each limit switch input. 

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