why does centroid never remember its coordinate/home

All things related to the Centroid Acorn CNC Controller

Moderator: cnckeith

shreddedcurbs
Posts: 100
Joined: Sat Nov 14, 2020 6:33 am
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
CNC Control System Serial Number: none
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No

why does centroid never remember its coordinate/home

Post by shreddedcurbs »

Once you shut down CNC12 Pro it forgets your machine home, your park coordinates as well. Why?

Is this just a hobby controller?
shreddedcurbs
Posts: 100
Joined: Sat Nov 14, 2020 6:33 am
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
CNC Control System Serial Number: none
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No

Re: why does centroid never remember its coordinate/home

Post by shreddedcurbs »

Also, what sense does it make for you to click PARK and it to lower its z height first and then move XY, Z move should be last to ensure no CRASHES
suntravel
Posts: 1967
Joined: Thu Sep 23, 2021 3:49 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
CNC Control System Serial Number: 6433DB0446C1-08115074
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No
Location: Germany

Re: why does centroid never remember its coordinate/home

Post by suntravel »

Centroid forgets nothing :D

If you don't have a machine with absolute encoders on the axis, homing after shutdown is required.

0.25 form Home in park.mac should never be a reason for a crash ;)

Uwe
martyscncgarage
Posts: 9912
Joined: Tue Mar 28, 2017 12:01 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: Yes
Oak CNC controller: No
CNC Control System Serial Number: none
DC3IOB: No
CNC12: Yes
CNC11: Yes
CPU10 or CPU7: Yes
Location: Mesa, AZ

Re: why does centroid never remember its coordinate/home

Post by martyscncgarage »

Uwe is correct.
In order for the control to know where the machine is at when powered down, encoders with battery backup need to be used, and the logic needs to be written into the software. Absolute Encoder Cost implementation vs. the minor inconvenience of homing the machine at the beginning of each sessionis the reason.

Marty
Reminder, for support please follow this post: viewtopic.php?f=20&t=383
We can't "SEE" what you see...
Mesa, AZ
tblough
Posts: 3072
Joined: Tue Mar 22, 2016 10:03 am
Acorn CNC Controller: Yes
Allin1DC CNC Controller: Yes
Oak CNC controller: Yes
CNC Control System Serial Number: 100505
100327
102696
103432
7804732B977B-0624192192
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No
Location: Boston, MA
Contact:

Re: why does centroid never remember its coordinate/home

Post by tblough »

Post a report. You either have your axis travel directions wrong, or have edited your park macro. Home and Park should both have Z at full travel AWAY from the work.
Cheers,

Tom
Confidence is the feeling you have before you fully understand the situation.
I have CDO. It's like OCD, but the letters are where they should be.
martyscncgarage
Posts: 9912
Joined: Tue Mar 28, 2017 12:01 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: Yes
Oak CNC controller: No
CNC Control System Serial Number: none
DC3IOB: No
CNC12: Yes
CNC11: Yes
CPU10 or CPU7: Yes
Location: Mesa, AZ

Re: why does centroid never remember its coordinate/home

Post by martyscncgarage »

shreddedcurbs wrote: Wed Jan 19, 2022 2:40 am Also, what sense does it make for you to click PARK and it to lower its z height first and then move XY, Z move should be last to ensure no CRASHES
Tom makes a good point. You have a mill?
Where are your home switches?
On a mill, they should be at Z+ at the TOP of the Z travel
X and Y can be left or right
Parking moves the machine close to the home switches so it does not have very far to travel to home the machine.
Provide the BIG picture. Show pictures of your home switch placement and yes, provide a fresh report. F7 Utility, F7 Create Report.
Reminder, for support please follow this post: viewtopic.php?f=20&t=383
We can't "SEE" what you see...
Mesa, AZ
CNCMaryland
Posts: 369
Joined: Thu Nov 15, 2018 10:07 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
CNC Control System Serial Number: F045DA7CBF8b-103011290
DC3IOB: No
CNC11: No
CPU10 or CPU7: No

Re: why does centroid never remember its coordinate/home

Post by CNCMaryland »

shreddedcurbs wrote: Wed Jan 19, 2022 2:40 am Also, what sense does it make for you to click PARK and it to lower its z height first and then move XY, Z move should be last to ensure no CRASHES
This is completely wrong. The Z must move first. If you have a tool in the machine, and you don't fully retract Z, and the X&Y move, you can run the tool into something on the table, like the workpiece, or the hold downs, etc. Z Always first.
CNCMaryland
Posts: 369
Joined: Thu Nov 15, 2018 10:07 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
CNC Control System Serial Number: F045DA7CBF8b-103011290
DC3IOB: No
CNC11: No
CPU10 or CPU7: No

Re: why does centroid never remember its coordinate/home

Post by CNCMaryland »

Also, it doesn't have to re-home each time. Parameter 5 - Suppress Machine Home Setup.
vw_chuck
Posts: 194
Joined: Sun Sep 20, 2020 7:34 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
CNC Control System Serial Number: 0035FF8FEB5F-0708203490
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No

Re: why does centroid never remember its coordinate/home

Post by vw_chuck »

I have said the same thing in the past. The board needs a battery and some memory so that retains it's position from the last session so it thinks power was never turned off to it. Then you wouldn't have to rehome and set your part zeros and such. It would save a massive amount of time for us hobby guys. I would even pay like 50 bucks for a board add on to accomplish this.
CNCMaryland
Posts: 369
Joined: Thu Nov 15, 2018 10:07 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
CNC Control System Serial Number: F045DA7CBF8b-103011290
DC3IOB: No
CNC11: No
CPU10 or CPU7: No

Re: why does centroid never remember its coordinate/home

Post by CNCMaryland »

vw_chuck wrote: Wed Jan 19, 2022 10:33 am I have said the same thing in the past. The board needs a battery and some memory so that retains it's position from the last session so it thinks power was never turned off to it. Then you wouldn't have to rehome and set your part zeros and such. It would save a massive amount of time for us hobby guys. I would even pay like 50 bucks for a board add on to accomplish this.
First off, no machine is able to do this unless it has absolute encoders. Once you turn any machine off and then on, the motors jump to some degree (.01mm perhaps).

Secondly, if you have good home switches, all you need to do is home the machine at startup. If the home switches are accurate, all your WCS are just as accurate.

Third, you can go into system Parms and turn off the need to home at startup.
Post Reply