Bridgeport with Siemens amps and servos
07 Mar 2012 13:02 #18443
by BigJohnT
Replied by BigJohnT on topic Re:Bridgeport with Siemens amps and servos
I can post a working "bare bones" config for the 5i25 + 7i77 a bit later today. You will need to wire up field power to have the I/O pins seen by the 5i25. IIRC you will need to be using LinuxCNC 2.5.
Where are you at now with the hardware and software?
John
Where are you at now with the hardware and software?
John
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07 Mar 2012 14:56 #18445
by PCW
Replied by PCW on topic Re:Bridgeport with Siemens amps and servos
Here is a (very bare bone) 5i25/7i77 hal/ini file pair
basically just the hm2-servo demo config
with a few 5i25/7I77 specific changes:
freeby.mesanet.com:7i77.zip
basically just the hm2-servo demo config
with a few 5i25/7I77 specific changes:
freeby.mesanet.com:7i77.zip
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07 Mar 2012 15:43 - 07 Mar 2012 15:43 #18447
by BigJohnT
Replied by BigJohnT on topic Re:Bridgeport with Siemens amps and servos
And for a bleached bone very basic configuration for the 5i25 + 7i77...
John
John
Last edit: 07 Mar 2012 15:43 by BigJohnT.
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07 Mar 2012 18:19 #18449
by BRoth
Replied by BRoth on topic Re:Bridgeport with Siemens amps and servos
Thanks guys,
I understand what's going on now. Those files work and now I can see the 7i77 pins. I did start hand editing a sample config before but wasn't able to run it without errors.
I upgraded to the LinuxCNC brand through Synaptic Package Manager. 2.5.0-pre2-909
I understand what's going on now. Those files work and now I can see the 7i77 pins. I did start hand editing a sample config before but wasn't able to run it without errors.
I upgraded to the LinuxCNC brand through Synaptic Package Manager. 2.5.0-pre2-909
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21 May 2012 17:45 #20262
by BRoth
Replied by BRoth on topic Re:Bridgeport with Siemens amps and servos
I finally have some time again to work on the mill. The encoders are wired and working but I'm not getting anything from the analog outputs. The drive enable half works so my amps are on but when I move an axis there is no 0-10 voltage. I have the pin as hm2_5i25.0.7i77.0.1.analogout0 for X. Is it supposed to be a 0 before the analogout? Like .0.0.analogout0? Am I sending a signal to a card that doesn't exist or is my pin name completely wrong? When I check that pin with Hal scope there is voltage but at the physical pin there isn't. Otherwise everything else works, inputs and outputs.
Benjamin
Benjamin
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21 May 2012 18:27 #20263
by PCW
Replied by PCW on topic Re:Bridgeport with Siemens amps and servos
Thats the correct name (its hm2_cardname.cardnumber.remotesserialdevicename.sserialport.sserialchannel.signal)
and since the 7I77s analog is on channel 1 (I/O is channel 0) this is right.
You cannot send a signal to a card that does not exist (as the pin name will not exist)
If you have not changed the analog out scaling and you enable the outputs (and unlink them from the PID component) you should be able to set the outputs directly in volts
and since the 7I77s analog is on channel 1 (I/O is channel 0) this is right.
You cannot send a signal to a card that does not exist (as the pin name will not exist)
If you have not changed the analog out scaling and you enable the outputs (and unlink them from the PID component) you should be able to set the outputs directly in volts
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22 May 2012 04:43 #20269
by BRoth
Replied by BRoth on topic Re:Bridgeport with Siemens amps and servos
Thanks, that makes better sense now. I still couldn't get anything to show up so I started fresh and copied over the things that worked. Now everything seems to output what it should. I hooked up the drives and the servos do what they should. It sure makes me happy to see some progress!
I am having a bit of trouble with the X axis. When I enable the drives I can jog everything just fine, smooth movement and the distance is almost perfect (Best I can measure for now). The positive movement is negative though. I change the encoder value (I can't remember the exact name in the .ini) to a negative and this corrects the direction but now as soon as I enable the drives it moves right. When trying to home the movement is intermittent and the table shutters. No changes have made a difference to the homing The Y axis homes as it should. Also, the X servo "sings". With the Jog, it functions like it should, it just emits an annoying high pitched squeal. I turned down the gain and it helped some but not as much as I hoped. It did not do this when I tested the the drives a few months ago.
I am having a bit of trouble with the X axis. When I enable the drives I can jog everything just fine, smooth movement and the distance is almost perfect (Best I can measure for now). The positive movement is negative though. I change the encoder value (I can't remember the exact name in the .ini) to a negative and this corrects the direction but now as soon as I enable the drives it moves right. When trying to home the movement is intermittent and the table shutters. No changes have made a difference to the homing The Y axis homes as it should. Also, the X servo "sings". With the Jog, it functions like it should, it just emits an annoying high pitched squeal. I turned down the gain and it helped some but not as much as I hoped. It did not do this when I tested the the drives a few months ago.
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22 May 2012 13:46 - 31 May 2012 02:18 #20271
by PCW
Replied by PCW on topic Re:Bridgeport with Siemens amps and servos
If you reverse the input scale, you will also have to reverse the output scale
or the axis will "run-away" as soon as enabled. If your drives have +IN and -IN
you can swap these or I believe you can swap the signs on the maxlimit and minlimit
parameters of the analog out for the affected axis.
correction -- to reverse a 7I77 output direction you reverse the sign on the parameter
hm2_5i25.0.7i77.0.1.analogoutN-scalemax
where N is the axis number
for example
setp hm2_5i25.0.7i77.0.1.analogout4-scalemax -10
or the axis will "run-away" as soon as enabled. If your drives have +IN and -IN
you can swap these or I believe you can swap the signs on the maxlimit and minlimit
parameters of the analog out for the affected axis.
correction -- to reverse a 7I77 output direction you reverse the sign on the parameter
hm2_5i25.0.7i77.0.1.analogoutN-scalemax
where N is the axis number
for example
setp hm2_5i25.0.7i77.0.1.analogout4-scalemax -10
Last edit: 31 May 2012 02:18 by PCW. Reason: correction
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31 May 2012 01:44 #20517
by BRoth
Replied by BRoth on topic Re:Bridgeport with Siemens amps and servos
Thanks PCW, I was so concerned with the .ini file that I forgot about simply switching wires.
I tightened the connections for the tacho and that solved the jitter in the motion. I think I have everything tuned fairly well, dimentions seem fine.
Attached is a picture of the first cut using a modified version of the sample program Spiral.ngc. I cut an aluminum part afterwards just to check.
The rotary is left to do yet and maybe eventually a Z axis. At least I can do something with a two axis for now.
I tightened the connections for the tacho and that solved the jitter in the motion. I think I have everything tuned fairly well, dimentions seem fine.
Attached is a picture of the first cut using a modified version of the sample program Spiral.ngc. I cut an aluminum part afterwards just to check.
The rotary is left to do yet and maybe eventually a Z axis. At least I can do something with a two axis for now.
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31 May 2012 01:48 #20518
by BRoth
Replied by BRoth on topic Re:Bridgeport with Siemens amps and servos
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