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543 Azd M
azken98 Offline Send Email
Aug 5, 2010
6:06 am
Hi Is there any plan to increase the PWM resolution of the SnapAmp1000 and the DAC resolution of the Kanalog. I belief both are quite low 155 bits and 12...
544 Tom Kerekes
TKSOFT Offline Send Email
Aug 5, 2010
3:36 pm
Hi Azed, No we don't.  I think you will find the resolutions are usually more than adequate.  This is because a servo output is integrated over time.  The...
545 Azd Md
azken98 Offline Send Email
Aug 6, 2010
8:12 am
I am trying to use the system for dynamic parameter identification where the estimated parameters of the plant  depend significantly on the accuracy of the...
546 Tom Kerekes
TKSOFT Offline Send Email
Aug 6, 2010
9:33 pm
Oh I see.  Actually the current measurement resolution on SnapAmp is 14 bits.  But since it is over a fairly large range of +/- 35Amps the resolution comes...
547 Marty Escarcega
opencon1 Offline Send Email
Aug 9, 2010
6:32 pm
How close are you to implementing single point threading on the lathe? Either with your software or ultimately the Mach III plug in. Thank you!. Marty...
548 Tom Kerekes
TKSOFT Offline Send Email
Aug 9, 2010
7:38 pm
Hi Marty, We are cutting good multipass threads via a KFlop User C Program.  See the email and video from a User below. So currently it is possible to do...
549 Marty Escarcega
opencon1 Offline Send Email
Aug 10, 2010
3:08 am
Thanks Tom. That helps. How would one test? Do you have a beta version of the software enabled for threading G codes? To use your hardware does one have to be...
550 Tom Kerekes
TKSOFT Offline Send Email
Aug 10, 2010
4:59 pm
Hi Marty, Not yet.  I recently discovered that Mach3 implements G76 as a macro called M1076.m1s that in turn uses G32.  So it seems we just need to implement...
551 Ross Ferguson
fermanz Offline Send Email
Aug 10, 2010
7:01 pm
Hi Tom, In that C program, that you mention, is there a lefthand and righthand threading option? And to achieve that do we just change the Zend to a positive...
552 aeunson@...
aeunson... Offline Send Email
Aug 10, 2010
8:33 pm
Hi everyone. Totaly new to Kflop, Kanalog and servos but I have successfuly converted a mill and lathe to cnc using Mach 3 and steppers but it would seem that...
553 Tom Kerekes
TKSOFT Offline Send Email
Aug 10, 2010
8:40 pm
Hi Ross, That could have been written better.  I think you need to change the Zend, the rate, one "if" statement. such as: double Zstart = 0; double Zend =...
554 Tom Kerekes
TKSOFT Offline Send Email
Aug 10, 2010
8:51 pm
Hi Arthur, Hmm...  Please verify with a voltmeter that the DAC0 output is +1V after a DAC0=200 command and -1V after a DAC0=-200 command. Were you able to...
555 aeunson@...
aeunson... Offline Send Email
Aug 10, 2010
9:03 pm
Hi Tom, No Voltmeter reads 0.018v no matter what command. Using pot motor runs both directions. I think the problem is I may not be configuring kmotion...
556 aeunson@...
aeunson... Offline Send Email
Aug 10, 2010
9:10 pm
Tom, In configuration I have channel 0 Axis mode input set to encoder and output set to DAC Servo. I then download channel to kmotion. Is this corrct? Arthur...
557 Tom Kerekes
TKSOFT Offline Send Email
Aug 10, 2010
9:39 pm
Arthur, Ah. That is probably the problem.  Downloading a configuration enables the axis.  To issue DAC commands from the console you should NOT have the...
558 aeunson@...
aeunson... Offline Send Email
Aug 10, 2010
9:49 pm
Tom, Thats it running in both directions. If I send aa dac0=0 the motor still rotates slowly. Is this okay? Now to try and set up the encoder. Arthur...
559 Tom Kerekes
TKSOFT Offline Send Email
Aug 10, 2010
10:11 pm
Arthur, Good.  With Dac0=0 there is a small offset probably in both Kanalog and the amplifier.  If you find the value that makes it stop you can later enter...
560 aeunson@...
aeunson... Offline Send Email
Aug 10, 2010
10:32 pm
Tom, I have connected the encoder to JP1 A0+ A0- and B0+ B0-. Is there anything I need to do in kmotion to configure them? Arthur...
561 Ross Ferguson
fermanz Offline Send Email
Aug 10, 2010
10:33 pm
Thanks Tom, I can almost wrap my head around the first part, and make some sense of it. But could you explain the "if" section please? Ross ... -- Ferguson...
562 Tom Kerekes
TKSOFT Offline Send Email
Aug 10, 2010
10:48 pm
Ross, look for the line like this if (y < 0.0) y=0.0; change it to if (y > 0.0) y=0.0; TK ________________________________ From: Ross Ferguson...
563 Tom Kerekes
TKSOFT Offline Send Email
Aug 10, 2010
10:52 pm
Arthur, By default Axis 0 is configured for Encoder 0 input so you shouldn't need to do anything. But in general you would need to set the Axis configuration...
564 aeunson@...
aeunson... Offline Send Email
Aug 10, 2010
11:29 pm
Tom, Thats how I have it but not sure if it is working. Arthur...
565 Tom Kerekes
TKSOFT Offline Send Email
Aug 11, 2010
12:12 am
Arthur, On the Axis Screen does the "Position" change as you rotate the motor/encoder?  It should count up when rotating one direction and down the other. ...
566 aeunson@...
aeunson... Offline Send Email
Aug 11, 2010
7:38 am
Thanks Tom Axis position counts up and down depending on direction. What else do I need to do before I hook up the motor to the table again? At the moment I...
567 Tom Kerekes
TKSOFT Offline Send Email
Aug 11, 2010
4:15 pm
Hi Arthur, You are doing great for someone who hasn't done this before.  If you have some patience I'm sure you will be successful. Keep the motor on the...
568 aeunson@...
aeunson... Offline Send Email
Aug 11, 2010
8:31 pm
Hi Tom, I uploaded a screenshot of the result to the files section to see if you think this is correct. Problem is the motor still rotates slowly cw with no...
569 aeunson@...
aeunson... Offline Send Email
Aug 11, 2010
8:35 pm
Tom I have just noticed I am getting an error showing in console after a move command. "Following error Disabled Axis :0" Arthur...
570 Tom Kerekes
TKSOFT Offline Send Email
Aug 11, 2010
9:21 pm
Hi Arthur, The main problem is that it looks like you have positive feedback instead of negative feedback (the motor is driving the wrong way to correct any...
571 aeunson@...
aeunson... Offline Send Email
Aug 11, 2010
9:56 pm
Hi Tom Ok I think that has done the trick but i notice the motor drives anticlockwise about 1/2 turn and returns. I have attached another screenshot to the...
572 Tom Kerekes
TKSOFT Offline Send Email
Aug 11, 2010
10:33 pm
Congratulations Arthur!  You now have a closed servo loop.  Since moving 1000 counts results in 1/2 rev, then the resolution must be about 2000 counts/rev. ...
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