mesa 7i76E - new pinout?
05 Feb 2017 13:05 #87337
by Reinhard
PCW wrote, that bringing the encoder to linuxcnc too, will cause some trouble on the encoder lines.
I'm confused
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So from my point of knowing I'll need:
1x 7i80HD
1x 7i47S
1x 7i47
1x 7i73
and I need them all at first step - no upgrade path. About 450 bucks from cncmonster.
Quite a big orange
And what about the bitfile? Does it support all modules needed?
Replied by Reinhard on topic mesa 7i76E - new pinout?
That was my initial idea - therefor I started to go for 7i80HD (well, I additionally love the pin setting scheme of the 50pin connectors).
It is generally preferred to take the encoder feedback to LinuxCNC, even if the drives also use it.But anyway - may be I was wrong respect to the encoders. I wanted to have an upgrade path for small servos, but after a quick research it looks like leadshine offers the same interface for small servos as for CL steppers. So may be, I don't need the encoder channels.
PCW wrote, that bringing the encoder to linuxcnc too, will cause some trouble on the encoder lines.
I'm confused
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Good point! Guess I'll go for that.If you added a 7i73 to the system, then you would have one ethernet cable from the PC to the controller, then another ethernet cable back to the operator panel for the 7i73, which can then be wired for up to 4 MPGs and your pushbuttons.
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Yes, that's the orange instead of an apple7i76E puts you firmly in the class of DB25 cards.
You could, instead, look at the 7i80HD-16 and the 50-pin cards.
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Agree! My problem is finding a bitfile, that brings all the modules I need.They are rather more general-purpose than the 7i76 etc, you don't get the same mixture of functions on each daughter-board, so choose daughter boards to add the functions.
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Hm, afaik the 7i47 does not have a spindle channel and the 7i47S support 4 step/dir channels only.7i80HD-16 running the 7i80hd_16_svst8_12_2x7i47.bit firmware and with one 7i47 would give you 5 stepgens and 4 encoders. (full encoders, but still usable for MPG) and then you would add something like a 7i37TA for the GPIO.
So from my point of knowing I'll need:
1x 7i80HD
1x 7i47S
1x 7i47
1x 7i73
and I need them all at first step - no upgrade path. About 450 bucks from cncmonster.
Quite a big orange
And what about the bitfile? Does it support all modules needed?
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06 Feb 2017 04:57 #87380
by Reinhard
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The LiChuan stepper driver provide a feedback and alarm channel, but the Leadshine do not. So don't know, whether linuxcnc should know about the feedback channels?
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So I have (as an orange setup):
1x CL-Stepper X-Axis
2x CL-Stepper Y-Axis
1x CL-Stepper Z-Axis
1x CL-Stepper A-Axis
Each Stepper has a (moving) inductive endstop switch: 4x Endstop PNP opener (NC)
As the A-Axis is below the 2D working area, I want to drive the mill with 2 different machine settings (one with A-Axis and one without), so X- and Z-Axis have double Endstops (and different machine limits), which switch depending on the active machine setting. I don't want to switch the hardware endstops, so I have 6 Endstop-Input channels.
The MPG-Channels are UI-elements to change speed factors of fast moves, work moves and spindle speed => 3 MPG channels
Than I want an UI-Element for manual movement: 1 MPG channel and 9 switches
Keyboard Switches: I don't know the exact amount yet. At least 3, realistic may be 10 or more.
Relais for cooling/dust collection: about 4 at first start
My upgrade path includes a B-Axis (possibly 2 steppers) and a tool changer: 2-3x CL-Stepper + 2x Endstop and for sure some switches.
At least 2 Relais for Door-Opener, Tool-Changer ...
Replied by Reinhard on topic mesa 7i76E - new pinout?
good pointLets start from scratch
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I don't know! My stepper drivers don't have an encoder output, so I'll do, what you recommend.Do you need per axis encoder feedback from the drives?
(this is of somewhat questionable value on standard stepper motor systems since it can really only flag errors)
The LiChuan stepper driver provide a feedback and alarm channel, but the Leadshine do not. So don't know, whether linuxcnc should know about the feedback channels?
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Ok, I build a 4 axis gantry mill with all closed loop steppers (stepper driver need the encoder signals).What actual I/O do you need? (MPGs, digital ins and outs)
What type of drives do you have? How many Axis?
So I have (as an orange setup):
1x CL-Stepper X-Axis
2x CL-Stepper Y-Axis
1x CL-Stepper Z-Axis
1x CL-Stepper A-Axis
Each Stepper has a (moving) inductive endstop switch: 4x Endstop PNP opener (NC)
As the A-Axis is below the 2D working area, I want to drive the mill with 2 different machine settings (one with A-Axis and one without), so X- and Z-Axis have double Endstops (and different machine limits), which switch depending on the active machine setting. I don't want to switch the hardware endstops, so I have 6 Endstop-Input channels.
The MPG-Channels are UI-elements to change speed factors of fast moves, work moves and spindle speed => 3 MPG channels
Than I want an UI-Element for manual movement: 1 MPG channel and 9 switches
Keyboard Switches: I don't know the exact amount yet. At least 3, realistic may be 10 or more.
Relais for cooling/dust collection: about 4 at first start
My upgrade path includes a B-Axis (possibly 2 steppers) and a tool changer: 2-3x CL-Stepper + 2x Endstop and for sure some switches.
At least 2 Relais for Door-Opener, Tool-Changer ...
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