Amplifier Inhibit
24 May 2022 14:31 #243691
by Kylizer
Amplifier Inhibit was created by Kylizer
Ive figured out that to enable and disable my amplifiers that there is a fault wire that goes to them. This disables the amps when the wire is pulled up with a resistor. This is kinda new to me but I do get the idea. I just cant think on how I would incorperate this so I could control it with my mesa 7i97. I know it goes to the first two pins on tb3. I dont know how to wire something like this though.
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24 May 2022 15:02 #243695
by andypugh
Replied by andypugh on topic Amplifier Inhibit
What voltage des it need to be pulled up to?
The 7i97 has specific drive enable outputs:
"The 7I97 is a Ethernet connected motion control interface designed for interfacing up to 6 Axis of analog servo motor drives and includes encoder feedback for each axis. The 7I97 has 6 +-10V analog outputs and 6 drive enable outputs. "
And:
"SERVO ENABLE OUTPUTS
Six uncommitted OPTO coupler outputs are available for drive enable. Four of
these outputs (ENA0 through ENA3) are switched in common while ENA4 and ENA5 can
be independently switched for spindle applications. The ENA outputs are floating switches
so can be used for active high and active low drive enables. Output rating of the switches
is 50 mA max at 100VDC max . Note that the enable outputs are polarized and can be
damaged with reverse polarity. For active high drive enables, ENAN+ should go to the
appropriate positive power supply and ENAN- to the drive enable input. For active low
enable drives, ENAN+ should go the the drive enable and ENAN- to control power ground."
Do you have the manual?
www.mesanet.com/pdf/parallel/7i97man.pdf
The 7i97 has specific drive enable outputs:
"The 7I97 is a Ethernet connected motion control interface designed for interfacing up to 6 Axis of analog servo motor drives and includes encoder feedback for each axis. The 7I97 has 6 +-10V analog outputs and 6 drive enable outputs. "
And:
"SERVO ENABLE OUTPUTS
Six uncommitted OPTO coupler outputs are available for drive enable. Four of
these outputs (ENA0 through ENA3) are switched in common while ENA4 and ENA5 can
be independently switched for spindle applications. The ENA outputs are floating switches
so can be used for active high and active low drive enables. Output rating of the switches
is 50 mA max at 100VDC max . Note that the enable outputs are polarized and can be
damaged with reverse polarity. For active high drive enables, ENAN+ should go to the
appropriate positive power supply and ENAN- to the drive enable input. For active low
enable drives, ENAN+ should go the the drive enable and ENAN- to control power ground."
Do you have the manual?
www.mesanet.com/pdf/parallel/7i97man.pdf
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24 May 2022 17:30 #243707
by Kylizer
Replied by Kylizer on topic Amplifier Inhibit
Yes I do. So then I dont necessarily need a seperate resistor in my line anywhere? The 7i97 will do this for me if everything is wired right and I have it set correct when I flash my setup to the board?
Page 7 of the manual I attached is where im getting this from. It is the manual to my amplifiers
Page 7 of the manual I attached is where im getting this from. It is the manual to my amplifiers
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24 May 2022 18:11 - 24 May 2022 18:11 #243715
by PCW
Replied by PCW on topic Amplifier Inhibit
Do you have the drive specifications? (no attachment was posted)
The 7I97 enable outputs are basically switches that are OFF until enabled by LinuxCNC
If you can enable the drives by a combination of a resistor and a switch
(test with a mechanical switch) such that the drive is enabled when the
switch is on, a 7I97 enable output will work (making sure the polarity is correct)
The 7I97 enable outputs are basically switches that are OFF until enabled by LinuxCNC
If you can enable the drives by a combination of a resistor and a switch
(test with a mechanical switch) such that the drive is enabled when the
switch is on, a 7I97 enable output will work (making sure the polarity is correct)
Last edit: 24 May 2022 18:11 by PCW.
The following user(s) said Thank You: Kylizer
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24 May 2022 21:16 #243721
by Kylizer
Replied by Kylizer on topic Amplifier Inhibit
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25 May 2022 00:06 #243734
by andypugh
Replied by andypugh on topic Amplifier Inhibit
Were you planning on using FAULT or RESET to disable the amp?
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25 May 2022 01:26 #243743
by PCW
Replied by PCW on topic Amplifier Inhibit
It looks to me like reset in mode C (ground to enable) would be a good option
reset --> enable+
enable- --> common
reset --> enable+
enable- --> common
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25 May 2022 21:34 #243846
by Kylizer
Replied by Kylizer on topic Amplifier Inhibit
So I have to have a special board to hook up in order to switch over to type c mode. I dont have this and have figured out that I am stuck with the type A which says "Type "A": Requires grounding of input to disable the amplifier (pull-up, active-low)."
Since this is the case how should I go about the wiring? Please and thank you
Since this is the case how should I go about the wiring? Please and thank you
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25 May 2022 21:48 - 25 May 2022 21:50 #243848
by PCW
Replied by PCW on topic Amplifier Inhibit
That's a bit awkward since you now have a "disable" input
One way to do this is to add a fairly stiff pulldown resistor
to the reset input (say 330 Ohm) so that its normally disabled,
and then to pull up the input with 7I97 enable output (ENA+ to 5V
ENA- to reset input)
One way to do this is to add a fairly stiff pulldown resistor
to the reset input (say 330 Ohm) so that its normally disabled,
and then to pull up the input with 7I97 enable output (ENA+ to 5V
ENA- to reset input)
Last edit: 25 May 2022 21:50 by PCW. Reason: reset input not disable input
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24 Jun 2022 17:14 #245800
by Kylizer
Replied by Kylizer on topic Amplifier Inhibit
Like this? Also I ordered resistors and was wondering if they have to be put in a certain way as ive never messed with them before. Do they have a negative and a positive side or the current has to flow the correct way?
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