7I96 Plasmac THAC / encoder config question
27 Jun 2020 21:53 #172919
by calvin.d
7I96 Plasmac THAC / encoder config question was created by calvin.d
I am setting up a 7I96 to use with a small plasma cutter. I am trying to confirm the dual THAC setup. Can I use the stock bit file for the 7I96 or do I need one with 2 encoders instead ?
the stock bit file for a 7I96 looks like it has a single quad encoder setup
TB1
pin 27 Quad-A
pin 28 Quad-B
pin 29 Quad-IDX
The Plasmac instructions is based on the 7I76E for the connections
Assuming it is connected to a 7i76e, connect the output to the spindle encoder input:
THCAD +5v to TB3 Pin 6 (+5 VP)
THCAD -5v to TB3 Pin 1 (GND)
THCAD FOUT+ to TB3 Pin 7 (ENC A+)
THCAD FOUT- to TB3 Pin 8 (ENC A-)
For the second encoder it needs a separate bit file that adds another encoder input to read
Thank you for the help
Calvin
the stock bit file for a 7I96 looks like it has a single quad encoder setup
TB1
pin 27 Quad-A
pin 28 Quad-B
pin 29 Quad-IDX
The Plasmac instructions is based on the 7I76E for the connections
Assuming it is connected to a 7i76e, connect the output to the spindle encoder input:
THCAD +5v to TB3 Pin 6 (+5 VP)
THCAD -5v to TB3 Pin 1 (GND)
THCAD FOUT+ to TB3 Pin 7 (ENC A+)
THCAD FOUT- to TB3 Pin 8 (ENC A-)
For the second encoder it needs a separate bit file that adds another encoder input to read
Thank you for the help
Calvin
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27 Jun 2020 21:56 #172921
by snowgoer540
There is a zip file of firmwares on the Mesa site for the 7i96 card. There’s a 7i96dpl.bit (or something very similar, doing this from memory), use the mesaflash guide in the 7i96 manual to flash the firmware on the card. It will give you three Quad-A encoders, which you will use two of them. Then you’ll use the .00 velocity for THC and .01 velocity for ohmic.
Hopefully that makes sense...
Replied by snowgoer540 on topic 7I96 Plasmac THAC / encoder config question
I am setting up a 7I96 to use with a small plasma cutter. I am trying to confirm the dual THAC setup. Can I use the stock bit file for the 7I96 or do I need one with 2 encoders instead ?
the stock bit file for a 7I96 looks like it has a single quad encoder setup
TB1
pin 27 Quad-A
pin 28 Quad-B
pin 29 Quad-IDX
The Plasmac instructions is based on the 7I76E for the connections
Assuming it is connected to a 7i76e, connect the output to the spindle encoder input:
THCAD +5v to TB3 Pin 6 (+5 VP)
THCAD -5v to TB3 Pin 1 (GND)
THCAD FOUT+ to TB3 Pin 7 (ENC A+)
THCAD FOUT- to TB3 Pin 8 (ENC A-)
For the second encoder it needs a separate bit file that adds another encoder input to read
Thank you for the help
Calvin
There is a zip file of firmwares on the Mesa site for the 7i96 card. There’s a 7i96dpl.bit (or something very similar, doing this from memory), use the mesaflash guide in the 7i96 manual to flash the firmware on the card. It will give you three Quad-A encoders, which you will use two of them. Then you’ll use the .00 velocity for THC and .01 velocity for ohmic.
Hopefully that makes sense...
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27 Jun 2020 21:59 #172922
by calvin.d
Replied by calvin.d on topic 7I96 Plasmac THAC / encoder config question
yes it does, I was hoping there as a pre made bit file for this
ill give it a try now
Thank you
ill give it a try now
Thank you
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27 Jun 2020 22:00 #172923
by snowgoer540
Replied by snowgoer540 on topic 7I96 Plasmac THAC / encoder config question
Missed the connections question, just follow the pin out guide on the 7i96 manual, it’s still ENCA+ and ENCA- for the thc, then you’ll use the ENCB+ and ENCB- for the ohmic, but the firmware will identify it as two QUAD-A’s
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27 Jun 2020 22:29 #172925
by calvin.d
Replied by calvin.d on topic 7I96 Plasmac THAC / encoder config question
Looks like that was exactly what I needed
for anyone in a similar situation
1. get the support software for the 7i96 from the mesa site
2. connect to the board via mesa flash tool
"mesaflash --device 7i96 --addr 10.10.10.10 --reashmid"
will give you the current pinout based on the bit file loaded
3. decompress and find the 7i96dpl.bit file in the support software
4.flash the board
"mesaflash --device 7i96 --addr 10.10.10.10 --write 7i96dpl.bit"
5. power cycle or use mesaflash to reload
6. confirm the new bit file was loaded and the pinout changed
"mesaflash --device 7i96 --addr 10.10.10.10 --reashmid"
This now gives me
TB1
Pin 7 Quad-A
Pin 8 Quad-A
Pin 9 Quad-A
So I now have 3 A channels on 3 separate encoders, these are single ended right so now I am just running
THCAD FOUT+ (THCAD#1) ---> pin 27 Quad-A
THCAD FOUT+ (THCAD#2) ---> pin 28 Quad-A
and I am not connecting THCAD FOUT- to anything right ?
Is it worth while ti look into a bit file that has and A and -A pair for better signal protection ?
C
for anyone in a similar situation
1. get the support software for the 7i96 from the mesa site
2. connect to the board via mesa flash tool
"mesaflash --device 7i96 --addr 10.10.10.10 --reashmid"
will give you the current pinout based on the bit file loaded
3. decompress and find the 7i96dpl.bit file in the support software
4.flash the board
"mesaflash --device 7i96 --addr 10.10.10.10 --write 7i96dpl.bit"
5. power cycle or use mesaflash to reload
6. confirm the new bit file was loaded and the pinout changed
"mesaflash --device 7i96 --addr 10.10.10.10 --reashmid"
This now gives me
TB1
Pin 7 Quad-A
Pin 8 Quad-A
Pin 9 Quad-A
So I now have 3 A channels on 3 separate encoders, these are single ended right so now I am just running
THCAD FOUT+ (THCAD#1) ---> pin 27 Quad-A
THCAD FOUT+ (THCAD#2) ---> pin 28 Quad-A
and I am not connecting THCAD FOUT- to anything right ?
Is it worth while ti look into a bit file that has and A and -A pair for better signal protection ?
C
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27 Jun 2020 22:36 - 27 Jun 2020 22:36 #172927
by calvin.d
Replied by calvin.d on topic 7I96 Plasmac THAC / encoder config question
From the manual
TB2
7 ENCA+
8 ENCA-
10 ENCB+
11 ENCB-
is now really
TB2
Pin 7 ENC0A+
Pin 8 ENC0A-
Pin 10 ENC1A+
Pin 11 ENC1A-
so that maps to
THCAD FOUT+ (THCAD#1) ---> Pin 7 ENC0A+
THCAD FOUT- (THCAD#1) ---> Pin 8 ENC0A-
THCAD FOUT+ (THCAD#2) ---> Pin 10 ENC1A+
THCAD FOUT- (THCAD#2) ---> Pin 11 ENC1A-
C
TB2
7 ENCA+
8 ENCA-
10 ENCB+
11 ENCB-
is now really
TB2
Pin 7 ENC0A+
Pin 8 ENC0A-
Pin 10 ENC1A+
Pin 11 ENC1A-
so that maps to
THCAD FOUT+ (THCAD#1) ---> Pin 7 ENC0A+
THCAD FOUT- (THCAD#1) ---> Pin 8 ENC0A-
THCAD FOUT+ (THCAD#2) ---> Pin 10 ENC1A+
THCAD FOUT- (THCAD#2) ---> Pin 11 ENC1A-
C
Last edit: 27 Jun 2020 22:36 by calvin.d.
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28 Jun 2020 00:31 #172932
by snowgoer540
Replied by snowgoer540 on topic 7I96 Plasmac THAC / encoder config question
Yep! Looks like you got it figured out! Thanks for the extra intel for those who come looking.
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28 Jun 2020 00:35 #172933
by calvin.d
Replied by calvin.d on topic 7I96 Plasmac THAC / encoder config question
ok next problem
starting linuxcnc
error
setp requires 2 arguments, 1 given
for this line
"step hm2_[HOSTMOT2](Board).0.encoder.00.velocity
the initial config was made with the 7i96 config tool, I think I am going to convert it and hardcode all off the variables our of the config lines
still trying to figure out why that encoder line is not reading correctly
C
starting linuxcnc
error
setp requires 2 arguments, 1 given
for this line
"step hm2_[HOSTMOT2](Board).0.encoder.00.velocity
the initial config was made with the 7i96 config tool, I think I am going to convert it and hardcode all off the variables our of the config lines
still trying to figure out why that encoder line is not reading correctly
C
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28 Jun 2020 00:40 #172934
by snowgoer540
There’s an example in the plasmac user guide in section 27, but I think the (board) just needs to be changed to 7i96.
Replied by snowgoer540 on topic 7I96 Plasmac THAC / encoder config question
ok next problem
starting linuxcnc
error
setp requires 2 arguments, 1 given
for this line
"step hm2_[HOSTMOT2](Board).0.encoder.00.velocity
the initial config was made with the 7i96 config tool, I think I am going to convert it and hardcode all off the variables our of the config lines
still trying to figure out why that encoder line is not reading correctly
C
There’s an example in the plasmac user guide in section 27, but I think the (board) just needs to be changed to 7i96.
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28 Jun 2020 00:40 #172935
by phillc54
Replied by phillc54 on topic 7I96 Plasmac THAC / encoder config question
You may be better off using Pncconf and unchecking all the extra options then you don't end up with a lot of unnecessary lines. The encoder velocity line for instance is not need in the hal file but is set later by the Configurator.
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