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finalizing my control hardware - Double check me?
- photomankc
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21 Jul 2011 18:11 - 21 Jul 2011 18:22 #11714
by photomankc
finalizing my control hardware - Double check me? was created by photomankc
I want to get going on offloading step/dir from the PC . I have a stepper system, 3 axis someday 4 and want spindle On/Off + RPM control in the future too. I had two options I was looking at:
One is the PICO Systems stepper board. I like that one because the setup looks straight forward and there is a lot of stuff I would like to get already built into the board like relays and watchdog limits. I note it makes the steppers appear as fake servo drives. That said the $250 price tag is rather steep. Which leads to the next thing.
The MESA 7I43
I can't find much info on how that all is connected though nor exactly which if the cards is best. I guess that it is also fed by the PC Parallel port or is it the USB port? From there the firmware can implement the step/dir signals and EMC treats it like what... A servo as the other card or something else? I like the configuration tool that can be used with it but I need to be certain that with a stepper based system I just need this card, no other daughter boards or what-have-you?
If I go with the MESA cards which should I look at?
7I43H Anything I/O High speed USB - 400K FPGA - 48 I/O 119 95 90 86
7I43-P Anything I/O parallel only - 200K FPGA - 48 I/O 79 63 60 57
7I43-U Anything I/O USB/parallel - 200K FPGA - 48 I/O 89 71 68 64
7I43-U-4 Anything I/O USB/parallel - 400K FPGA - 48 I/O 99 79 75 71
I'm leaning towards the PICO board for a cleaner setup in my mind but the price of the MESA cards really pulls at me too.
One is the PICO Systems stepper board. I like that one because the setup looks straight forward and there is a lot of stuff I would like to get already built into the board like relays and watchdog limits. I note it makes the steppers appear as fake servo drives. That said the $250 price tag is rather steep. Which leads to the next thing.
The MESA 7I43
I can't find much info on how that all is connected though nor exactly which if the cards is best. I guess that it is also fed by the PC Parallel port or is it the USB port? From there the firmware can implement the step/dir signals and EMC treats it like what... A servo as the other card or something else? I like the configuration tool that can be used with it but I need to be certain that with a stepper based system I just need this card, no other daughter boards or what-have-you?
If I go with the MESA cards which should I look at?
7I43H Anything I/O High speed USB - 400K FPGA - 48 I/O 119 95 90 86
7I43-P Anything I/O parallel only - 200K FPGA - 48 I/O 79 63 60 57
7I43-U Anything I/O USB/parallel - 200K FPGA - 48 I/O 89 71 68 64
7I43-U-4 Anything I/O USB/parallel - 400K FPGA - 48 I/O 99 79 75 71
I'm leaning towards the PICO board for a cleaner setup in my mind but the price of the MESA cards really pulls at me too.
Last edit: 21 Jul 2011 18:22 by photomankc.
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21 Jul 2011 18:57 #11716
by PCW
Replied by PCW on topic Re:finalizing my control hardware - Double check me?
Because it needs real time access to the hardware, EMC2 can only use the EPP parallel port interface of the 7I43 which means
that the 7I43-P will work fine. The step/dir hardware on the 7I43 is basically like a velocity mode servo,
the hardware generates the step signals (up to MHz) and EMC tracks the step count and adjusts for dir change delays
clock differences etc. For a simple stepper based system with 5V limit switches and where the 7I43s 3.3V output drive is
sufficient for your step drives, you can get by with no daughtercards.
that the 7I43-P will work fine. The step/dir hardware on the 7I43 is basically like a velocity mode servo,
the hardware generates the step signals (up to MHz) and EMC tracks the step count and adjusts for dir change delays
clock differences etc. For a simple stepper based system with 5V limit switches and where the 7I43s 3.3V output drive is
sufficient for your step drives, you can get by with no daughtercards.
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- photomankc
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21 Jul 2011 21:27 #11717
by photomankc
Replied by photomankc on topic Re:finalizing my control hardware - Double check me?
Thanks a bunch for that info. Assuming I need to get it up to 5v logic levels I take it there is a daughter card to handle that? I see the 7I42/7I42TA Breakout/FPGA protection and the 7I37COM Isolated I/O card. I like the second for ease of setup. I tend to like 5V stuff for the better noise margin and the isolation wouldn't be a bad idea. Right now my drives are all set to operate active high.
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22 Jul 2011 13:53 - 22 Jul 2011 13:54 #11729
by andypugh
Replied by andypugh on topic Re:finalizing my control hardware - Double check me?
photomankc wrote:
Picture of the setup here, 7i43 on the right, home-made header-to-wire interface on the left.
picasaweb.google.com/bodgesoc/Gibbs#5438923441932523602
There is a lot to be said for the screw terminal board adaptor at the price that it is, though.
I have a system a lot like that, running from a 7i43. The only extra hardware is a ULN2003 to buffer the VFD on/off and dir outputs and a filter to convert the PWM output to an analogue voltage for the VFD.I want to get going on offloading step/dir from the PC . I have a stepper system, 3 axis someday 4 and want spindle On/Off + RPM control in the future too. I had two options I was looking at:.
Picture of the setup here, 7i43 on the right, home-made header-to-wire interface on the left.
picasaweb.google.com/bodgesoc/Gibbs#5438923441932523602
There is a lot to be said for the screw terminal board adaptor at the price that it is, though.
Last edit: 22 Jul 2011 13:54 by andypugh.
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- Mike_Eitel
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22 Jul 2011 16:16 #11734
by Mike_Eitel
Replied by Mike_Eitel on topic Re:finalizing my control hardware - Double check me?
Hi
I intend to go the same direction and ordered just few days ago a 7U43-U.
I think in future it could become an advantage to gave spenf 20$ plus and got USB plus double memory....
Your 3.3V shocked me a bit so I read the manual .... what you should never do by principal
)
I saw:
HARDWARE CONFIGURATION
CONNECTOR POWER
The power connection on both I/O connectors (Pin 49) can supply either 3.3V or
5V power. Supplied power should be limited to 400 mA total. W1 selects the power
supplied to both P3 and P4 . When W1 is in the "UP" position, 5V power is supplied to the
connector. When W1 is in the "DOWN" position, 3.3V power is supplied to P3 and P4.
Note that most Mesa I/O adapter cards that connect to Anything I/O cards require 5V.
BUS SWITCH MODE
Jumper W2 determines bus switch mode for all user I/O pins. When jumper W2 is
in the "UP" position, 5V tolerant mode is selected, when ‘down’, 3.3V mode is selected.
Note that 3.3V mode is not 5V tolerant. The FPGA can be damaged by input voltages
greater than 4V in 3.3V mode.
For me that says.
Set correct switches and run on 5 Volt ..
I hope thats correct.
Mike
I intend to go the same direction and ordered just few days ago a 7U43-U.
I think in future it could become an advantage to gave spenf 20$ plus and got USB plus double memory....
Your 3.3V shocked me a bit so I read the manual .... what you should never do by principal
![;-) ;-)](/media/kunena/emoticons/wink.png)
I saw:
HARDWARE CONFIGURATION
CONNECTOR POWER
The power connection on both I/O connectors (Pin 49) can supply either 3.3V or
5V power. Supplied power should be limited to 400 mA total. W1 selects the power
supplied to both P3 and P4 . When W1 is in the "UP" position, 5V power is supplied to the
connector. When W1 is in the "DOWN" position, 3.3V power is supplied to P3 and P4.
Note that most Mesa I/O adapter cards that connect to Anything I/O cards require 5V.
BUS SWITCH MODE
Jumper W2 determines bus switch mode for all user I/O pins. When jumper W2 is
in the "UP" position, 5V tolerant mode is selected, when ‘down’, 3.3V mode is selected.
Note that 3.3V mode is not 5V tolerant. The FPGA can be damaged by input voltages
greater than 4V in 3.3V mode.
For me that says.
Set correct switches and run on 5 Volt ..
I hope thats correct.
Mike
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22 Jul 2011 16:37 #11735
by PCW
Replied by PCW on topic Re:finalizing my control hardware - Double check me?
Yes, for most things 5V tolerant mode is what you want
3.3V mode its really only needed for high speed signals
(> 10 MHz or so)
3.3V mode its really only needed for high speed signals
(> 10 MHz or so)
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- Mike_Eitel
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22 Jul 2011 16:54 #11737
by Mike_Eitel
Replied by Mike_Eitel on topic Re:finalizing my control hardware - Double check me?
THX
looking foward to the HW, will get it when my daughter comes back from the US...
But we men are used to waît for the ladies![;-) ;-)](/media/kunena/emoticons/wink.png)
Mike
looking foward to the HW, will get it when my daughter comes back from the US...
But we men are used to waît for the ladies
![;-) ;-)](/media/kunena/emoticons/wink.png)
Mike
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22 Jul 2011 17:33 #11739
by andypugh
Replied by andypugh on topic Re:finalizing my control hardware - Double check me?
You know there are dealers/distributors in Austria and Czech?
www.cnc-ready.at/index.php?option=com_vi...8&Itemid=171&lang=en
www.duzi.cz/shop_cnc/index.php?main_page...d3c73c8d2cb011ac9a45
www.cnc-ready.at/index.php?option=com_vi...8&Itemid=171&lang=en
www.duzi.cz/shop_cnc/index.php?main_page...d3c73c8d2cb011ac9a45
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- Mike_Eitel
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22 Jul 2011 21:06 #11747
by Mike_Eitel
Replied by Mike_Eitel on topic Re:finalizing my control hardware - Double check me?
Ok
Would have been Fater and eventually a bit cheeper
But it's ok the way it is.
THX
Would have been Fater and eventually a bit cheeper
But it's ok the way it is.
THX
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