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13 Jan 2009 13:17 - 21 May 2009 10:40 #10 by BigJohnT
Suggestions for FAQ was created by BigJohnT
This Contains FAQ's for the Stepper Configuration Wizard.

What do I do first?
1 Read the Stepper Configuration Manual first!
2 Gather your machine specific data.
3 The StepConf Wizard is for stepper based machines.
Last edit: 21 May 2009 10:40 by BigJohnT.

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28 Mar 2009 23:14 #18 by EricKeller
Replied by EricKeller on topic Re:FAQ
Have these questions ever been asked?

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28 Mar 2009 23:15 #19 by BigJohnT
Replied by BigJohnT on topic Re:FAQ
Not yet... I was just testing.

John

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20 May 2009 13:42 #314 by acondit
Replied by acondit on topic Re:FAQ
John,

With stepconf what is the step rate? That is how are base period and number of steps related?
I thought it was two step per base period but I read in another post (on diy-cnc) that the max step rate was 1 step per two base periods.

Alan

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20 May 2009 14:31 #315 by BigJohnT
Replied by BigJohnT on topic Re:FAQ
Alan,

The base period depends on your latency test results.
The step rate depends on the base period and the stepper drive timing that you set on the basic setup page. The maximum step rate based on your the settings is displayed on that page as well.

www.linuxcnc.org/docview/html//config_st...ub:Basic-Information

The setpconf uses the double step method by using a reset.

axis.unpy.net/01188134101

John

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20 May 2009 14:52 - 20 May 2009 14:57 #316 by acondit
Replied by acondit on topic Re:FAQ
John,

I personally am familiar with many of the various intricacies of base period and even the method of computing what base period should be based on latency and stepper drive timing requirements.

I don't think it is productive to the goal of encouraging someone to use emc2, to say devour the documentation (initially). We need straightforward answers to basic questions. Then if they decide that EMC2 will meet their basic needs, I agree it is important to read the documentation. My personal feeling is that people who are unwilling to read shouldn't even be exploring CNC. However, I think the FAQ's can help them decide whether to even bother reading more.

What I am looking for is a simple statement about 1 step per two periods or 2 steps per 1 period, to which I can direct people who are inquiring about EMC2's maximum steprate.

Thanks,
Alan
Last edit: 20 May 2009 14:57 by acondit. Reason: Add more info

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20 May 2009 16:06 #317 by BigJohnT
Replied by BigJohnT on topic Re:FAQ
EMC2's maximum software step rate is dependent on the hardware latency and if you use the reset or not. With the reset you get one step every period and without reset you get one step every two periods.

I guess I misunderstood your question.

John

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20 May 2009 17:38 #318 by acondit
Replied by acondit on topic Re:FAQ
John,

I have a couple of suggestions for the FAQ. It would be great if the FAQ thread could always appear on the main categories page. And second the FAQ should be cleaned up so that it always has just the questions related answers together, not the discussion that relates to arriving at the answer. Then a separate thread for new questions. So maybe the "FAQ" should be locked and users can only post in the new questions thread, and periodically moderators add new questions and answers to the "FAQ".

What do you think?

Alan

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20 May 2009 19:34 #319 by BigJohnT
Replied by BigJohnT on topic Re:FAQ
Good Idea. I might have to redo the subject on this one and start a new FAQ.

John

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