Hybrid View
-
22-01-2018 #1
Centroid Acorn
I have one that i am currently installing on a CNC plasma Cutter. So far it look good it supports most g codes and looks like it might be a great alternative to Mach 3. I have used both Mach 3 and Linux based CNC controls with mixed results. Mach 3 is very old technology and so far the amount time required to get a Linux, or Kflop control to work is just not worth it.
I benched the Acorn getting three motors work in less than 2 hours. I will post some pictures and a link to a running machine n about two weeks.
I also use Siemens for my larger machine build projects. For a home or small shop application the Acorn looks like a great option.
-
23-01-2018 #2
Ha- no money if you can't sell a screen set :-)
I may try one on the lathe
Maybe il wait until a few more are running well in the uk
-
18-02-2018 #3
-
18-02-2018 #4
Just looked at a pic. It looks like the numbers decend.
Last edited by Chaz; 18-02-2018 at 11:05 PM.
-
19-02-2018 #5Code:
;============================================================================= MainStage ;============================================================================= ;Do gather if commanded (uncomment and recompile for debugging purposes) ;IF Aux11Key || ((SV_MPU11_ABS_POS_2 < SV_MACHINE_PARAMETER_45) && (SV_MACHINE_PARAMETER_45 < -1000)) THEN (Aux11KeyPD) ;IF Aux11KeyPD THEN (SV_TRIGGER_PLOT_DUMP), SET SV_STOP ;IF Aux11Key || OUT25 THEN (SV_TRIGGER_PLOT_DUMP) IF SV_PROGRAM_RUNNING THEN (ProgramRunning) ;cnctch.mac IF OnAtPowerUp_M THEN RequestedLocation_W = CurrentTurretPosition_W IF TRUE THEN TurretTimer = 700, ReversingTimer = 1500 IF M6 THEN (M6PD), SET DoingTurretIndex_M IF M6PD THEN RequestedLocation_W = SV_TOOL_NUMBER IF DoingTurretIndex_M && ((SV_TOOL_NUMBER < 1) || (SV_TOOL_NUMBER > 8)) THEN SET OtherFault_M, FaultMsg_W = INVALID_TOOL_NUMBER, RST DoingTurretIndex_M, RequestedLocation_W = CurrentTurretPosition_W, SET ToolChangeComplete ;code to calculate distance to move IF CurrentTurretPosition_W > RequestedLocation_W THEN PositionsToMove_W = CurrentToolPosition_W - RequestedLocation_W IF CurrentTurretPosition_W < RequestedLocation_W THEN PositionsToMove_W = (CurrentTurretPosition_W + 8) - RequestedLocation_W ;this assumes the PLC can handle ELSE.. IF TRUE THEN DistanceToMove_W = PositionsToMove_W * 45 ; This may need a further multiplication if we're not going to be moving in degrees (does this need extra movement to overshoot new position before reversing?) ;code to rotate A-axis require distance ;code to reverse A-axis IF TRUE THEN SET ToolChangeComplete IF !SV_PROGRAM_RUNNING THEN RST M6, RST DoingTurretIndex_M, RequestedLocation_W = CurrentTurretPosition_W IF !M6 THEN RST ToolChangeComplete, RST TurretTimer
It still needs the required code to actually move the A-axis.
Also see the notes I've added.
Having scanned through the manual, I can't see how, or even if, you can move an axis via the PLC.Avoiding the rubbish customer service from AluminiumWarehouse since July '13.
-
19-02-2018 #6
I've just realised, what you need to achieve may have to be via a combination of Macro and PLC.
The macro allows you to run normal G-codes, but I'm not sure if you can run calculations in a Macro.
What you may need to do, is run the Macro, which then moves to the PLC to calculate the rotation required, which is then stored in a variable the macro can access. The macro then carries out the required A axis movement.Avoiding the rubbish customer service from AluminiumWarehouse since July '13.
-
19-02-2018 #7
-
19-02-2018 #8
So some response from the Centroid forum. Explained the logic to him. It looks like I need to buy the software to get access to the M107 command needed for the BCD Tool Changer Output. Happy to buy it but need to know I can get it to work.
-
20-02-2018 #9
So a response from the Centroid Forum, Ill try this tomorrow.
http://centroidcncforum.com/viewtopi...4&p=9586#p9586
Because your turret is uni-directional, you will need to calculate the "rolled over position"
and command a move to that position. Once there, you will need to change the machine position
to reflect the turret position.
You don't nee the M107 for this since the tool number is the axis machine position. M107 is to send the tool number to the PLC
For the example(s) below:
Start cnctch.mac with a header for comments etc..
;------------------------------------------------------------------------------
; Filename: cnctch.mac
; Description: Axis driven tool change macro for lathe
; Notes: Turns/rev must be configured 1 = 1 turret position change
; Turret is on 3rd axis, positions are in machine position.
; Requires: Machine home must be set prior to use.
;
#100 = 12 ;Number turret positions
#101 = 1 ;Distance to move from current location to requested location.
#4120 = requested tool
#20601-#20604 = Counts per unit for axes1-4
parameter 6 = 1 for atc
;------------------------------------------------------------------------------
follow with a block that skips if graphing or searching
IF #50001 ;Prevent lookahead from parsing past here
IF #4201 || #4202 THEN GOTO 1000 ;Skip macro if graphing or searching
If not searching or graphing, check to make sure the turret is not already
at the requested position. If it is, skip the macro
IF [ABS[#4120-#5023] < .002] THEN GOTO 1000
; Notes: Turns/rev must be configured 1 = 1 turret position change
; Turret is on 3rd axis, positions are in machine position.
; Requires: Machine home must be set prior to use.
;
#100 = 12 ;Number turret positions
#101 = 1 ;Requested position
#20601-#20604 = Counts per unit for axes1-4
Example 1
ie.. Max position = 12. Sitting on 8, requested 3 Assuming direction always counts up when moving from tool to tool.
;If current machine position of turret is > requested position:
;subtract current position from max 12 - 8 = 4, then add the requested position 3, then add max position 12:
IF #5023 > #4120 THEN #101 = [[#100 - #5023] +[ #4120 + #100]
;Above to get to 3 from 8, you need to command a move to 19. 7 positions greater than current position.
G53 A19
;You may need a short move to go past this position and then reverse back to lock
;Once at requested position and locked, reset position for DRO display and prevent position windup
;Set current machine position to requested position
M26 /A L[#4120*#20603]
Example2
ie.. Max position = 12. Sitting on 8, requested 11 Assuming direction always counts up when moving from tool to tool.
;If current machine position of turret is < requested position:
;simply command a move to requested position
G53 A#4120
;You may need a short move to go past this position and then reverse back to lock
;Once at requested position and locked, reset position for DRO display and prevent position windup
;Set current machine position to requested position
M26 /A L[#4120*#20603]
N1000 ;Macro finished
-
20-02-2018 #10
So that answers the question if calculations can be done in macros.
That does look very like Fanuc programming, but as they don't seem to mention that anywhere in their blurb, I'm going to guess it's they're own version of it. (Fanuc let's you access machine variables via variable numbers within G-code, so you can do things like adjust g-code depending on machine status, or adjust tool offsets via G-code if you're using a tool checker/setter during runs).Avoiding the rubbish customer service from AluminiumWarehouse since July '13.
-
The Following User Says Thank You to m_c For This Useful Post:
Thread Information
Users Browsing this Thread
There are currently 2 users browsing this thread. (0 members and 2 guests)
Similar Threads
-
Centroid Acorn DIY CNC controller
By NB70 in forum Control Hardware & SystemsReplies: 3Last Post: 15-11-2017, 02:14 PM -
Centroid Acorn CNC Controller
By wallyblackburn in forum Gantry/Router Machines & BuildingReplies: 22Last Post: 29-10-2017, 12:28 PM -
Controller Cabinet
By cropwell in forum Workshop & EquipmentReplies: 2Last Post: 19-12-2015, 02:23 PM -
FOR SALE: Controller Box for sale
By lateAtNight in forum Items For SaleReplies: 12Last Post: 04-03-2012, 10:17 AM -
Controller Box
By M250cnc in forum Motor Drivers & ControllersReplies: 1Last Post: 21-11-2010, 01:34 AM
Bookmarks