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Messages - BR549

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1091
General Mach Discussion / Re: THC Problem
« on: May 22, 2015, 05:26:20 PM »
SORRY but I do not trouble shoot Chinglish manuals or cards.  Odds are good it does NOT support THC from the card.

(;-) TP

1092
Here you go ask him yourself about Razordance THC

http://www.razordance.co.uk/THC.htm

1093
General Mach Discussion / Re: THC Problem
« on: May 22, 2015, 04:24:52 PM »
THC with Mach3 will NOT work with any controller BUT an LPT version .  UNLESS that card was designed to run a THC from inside itself. Mach3 will not run it unless it is a LPT driver.

(;-) TP


1094
You can transfer the info from the Gcode program  using  #vars, or Tool#, or S word value just to name a few common ways.  Then update your THC from these values via Serial to the THC controller.

IF in the UK side of the big pond you may want to consider using the RAZORDANCE THC controller. All the hard work is already done. You just add in your updating protocol and you are ready to run.

As to Tom's method with an ESS he might not like it if I gave away the secret handshake.

(;-) TP

1095
Tom's THC does NOT use the serial for THC it is just used to program his THC for cutting values (arc voltage,etc) His system uses the Mach3 inputs THC UP and THC DOWN and ARC OK just like everyone else has to using the LPT version of Mach3.

NOW with his newest system the THC controls the z as well but that is DONE outside of Mach3 with the ESS.

What you are trying to do with auto presetting of the Machine based on material is not new it has been done before , several different ways (;-) .

Just a thought, (;-) TP


1096
He is a simple example of using the G41 offset with G52


;SECOND DATUM IS SET FROM SPAN BETWEEN TWO PARTS C-C (MEASURED JAWS - 5.159")
G40 G90 G49 G80
G54

M6T1
F30
G0 Z1.000
G0 X0.000 Y0.000  (Move to Point Of Origin)

G0 X-.500 Y-.500   ( give room for leadin)
G41 D1
G1 X0.000 Y0.000 Z-.100 (Leadin move)
Y2.5
G40
X-.500  Y3.000  Z1.000  (Leadout move)
G0 X1.8125  Y3.000  (give room for leadin)
G1 Z-.100
G41
G1 X1.3125 Y2.5     ( LeadIn Move)
X1.3125 Y0.000
G40
G1 X1.8125 Y-.500  Z1.000     ( Lead Out Move)

(End first segment)
(Move to next segment G52 offset)


G0 X5.159 Y0.000    ( Move to new Point of Origin)
G52 X0.000
G0 X-.500 Y-.500   ( give room for leadin)
G41 D1
G1 X0.000 Y0.000 Z-.100 (Leadin move)
Y2.5
G40
X-.500  Y3.000 Z1.000  (Leadout move)
G0 X1.8125  Y3.000  (give room for leadin)
G1 Z-.100
G41
G1 X1.3125 Y2.5     ( LeadIn Move)
X1.3125 Y0.000
G40
G1 X1.8125Y-.500  Z1.000     ( Lead Out Move)

G0 X0 Y0
G52 X5.159
G0 X0.000
(Return to Original POI)
M30
%

1097
Trying to do THC across the serial port is WAY TO SLOW to be effective  By the time you get the data to mach3 it is past history and invalid for corrections.

The THC up /down inputs run at kernal speed and are just barely fast enough.

THere is a THC plugin on this site that is an alterative solution. It may be what you need.

For THC in the UK I would use  RazorDance systems THC.

(;-) TP

1098
Just a thought, but it may not be a great idea to continously write to the Gcode buffer in that manner ( ten times per sec).  Maybe Maybe not (;-)

I would write directly to the DRO and quaulify it so that IF it is already set to 2000 ignore the write.

If (DRO) <> 2000 then
    Write to the ( DRO,2000)
End if

1099
Seeing as no one knows exactly how your spindle is setup I do not have anything else to offer.

The only other option is to MOD your cam POST to only output S2000.

(;-) TP

1100
Just set up(program) your VFD to always use 60 hz and let Mach3 turn ON /OFF the drive .

(;-) TP

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