Electronic home switches made easy!

[justCNCit]

So all is hooked up and hardware is in order but the Y and A axis home in a different way from each other and in a different way each time, often to positions off 0.020" to where they were before. I can't tell what Mach is thinking. Is there a way to access whatever script file is in charge of its internal homing procedure? It's making no sense to me.

[ger21]

What homing script are you using?
Are you using the parallel port, or a motion controller?
Do you have "Home Slave with Master" checked in General Config?

[justCNCit]

Home Slave with Master is not checked.
I am using G540 output and a very simple parallel port BOB. Signals show on the diagnostic screen nicely as M2 and M4 home. The home script is

DoButton( 24 )
DoButton( 23 )
DoButton( 22 )
DoButton( 25 )

[ger21]

Try using:

DoButton(24)
DoButton(22)
RefCombination(10)

[justCNCit]

Sorry no, dial indicators still show it way off. The home switches trigger on diagnostics at the zero for both indicators. For A axis, Mach goes back and forth twice after passing zero and then stops at a value anywhere .005" to .020" away. However, Y axis looks pretty good and seems to stay at zero after homing. A does not. Debounce and index are set at 2000.

Y axis does not struggle at all and moves straight to zero. A seems to be struggling for some reason.

[ger21]

Are ALL settings the same for both axis, including the homing speed in Config > Homing Limits?

If so, I'd try creating a new profile from scratch.
Twice, I've had my .xml file become corrupt, and both times I noticed it because it caused issues with homing.

[justCNCit]

540BVFD.mxl, or Mach3Mill.xml?

And I found that despite axis values being saved previously the A axis did not have the same accelerations as the Y. Very strange.

[justCNCit]

Replaced the xml with 540 re configured all settings same result!!

Now on closing, Mach says error found, Art Code: 9991, Attempt Recovery?

Error triggered

[ger21]

I'd completely uninstall Mach3, and re-install. And create an .xml from scratch, not from an existing one.

It's either something in your settings, or a problem with your installation.

Has this machine been running fine with this PC in the past?

[justCNCit]

Hello, just a repost from Artsoft forum where I started similar thread:

Just FYI, got tired of dealing with Mach 3 and installed an Arduino between the parallel port and the 540, with a homing program connected to the switches and it works perfectly now. I can post the program if people want to see, lessons learned here were that Mach does control direction outputs and override the Arduino even if there is no movement, so you would either have to disable those outputs from Mach in software or disconnect the cable while using the Arduino homing program. A $10 solution.

[juavil]

Hello, just a repost from Artsoft forum where I started similar thread:

Just FYI, got tired of dealing with Mach 3 and installed an Arduino between the parallel port and the 540, with a homing program connected to the switches and it works perfectly now. I can post the program if people want to see, lessons learned here were that Mach does control direction outputs and override the Arduino even if there is no movement, so you would either have to disable those outputs from Mach in software or disconnect the cable while using the Arduino homing program. A $10 solution.

Please, add the link to your original thread in artist forum.

Enviado desde mi D5803 mediante Tapatalk

[Mike58]

to :
CNC Limit & Home Switch Kit

X²Design&Fabrication

Hello x2,
Please contact me with respect to above Kit- web page
This site can’t be reached

www.x2df.com’s server DNS address could not be found.

[Mike58]

Hello Roman,
Could you please reply;
1) is the triggering done in position A or B on the sketch -
2) Can you indicate the distance in mm ?
3) how far beck you need to go to get out of Hall sensor to be in "Green" again ?

I am looking for solution on my Pick & Place where space is very limited....

Thanks
Mike

[Mike58]

here the picture Roman

Mike

[ger21]

Roman hasn't been here for a few years now, unfortunately.

[Al_The_Man]

Hello Roman,
Could you please reply;
Mike

Yes, he has been also absent from other forums he belonged to since around 2013, also his web site has not been updated since then. https://www.romanblack.com/
Al.

[john-100]

Hi mike

how close the magnet need to be to switch on a normally open HAL switch like the SS441
depends on how powerful a magnet is and the minimum flux density to switch on as specified on the data sheet


typical values for SS441
switches on at 85 gauss
switches off at 40 gauss
hysteresis 45 gauss

if the magnet is too strong
you could use a magnetic shunt to weaken the magnetic field to reduce the gap between the switch and magnet when it switches on
Roman advised against using super magets because they are too powerful !

John

[Mike58]

Strange - I see this>:

[ger21]

That's not Roman.

[Mike58]

Well Noted - thanks.
Mike