Stepper Testing - Revision history

ChuckH: /* status */

2013-07-08T16:27:21Z

status

2013-07-08T16:26:52Z

2013-07-08T16:26:01Z

status

2013-07-08T16:25:05Z

← Older revision		Revision as of 16:25, 8 July 2013
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	<script type="text/javascript" src="http://s3.www.universalsubtitles.org/embed.js">		<script type="text/javascript" src="http://s3.www.universalsubtitles.org/embed.js">
	(		(
	{"video_url": "~~https~~://www.youtube.com/~~embed/~~/XcziyA8CrKI"}		{"video_url": "http://www.youtube.com/watch/?v=XcziyA8CrKI"}
	)		)
	</script>		</script>

2013-07-08T16:23:29Z

status

← Older revision		Revision as of 16:23, 8 July 2013
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	= Testing of open source stepper hardware/firmware =		= Testing of open source stepper hardware/firmware =
	===status===		===status===
	<~~iframe width~~="~~640~~" ~~height~~="~~360~~" ~~src=~~"https://www.youtube.com/embed//XcziyA8CrKI~~?feature=player_detailpage~~" ~~frameborder="0" allowfullscreen~~></~~iframe~~>
			<html>
			<script type="text/javascript" src="http://s3.www.universalsubtitles.org/embed.js">
			(
			{"video_url": "https://www.youtube.com/embed//XcziyA8CrKI"}
			)
			</script>
			</html>

	===grbl===		===grbl===

2013-07-08T16:21:25Z

status

← Older revision		Revision as of 16:21, 8 July 2013
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	= Testing of open source stepper hardware/firmware =		= Testing of open source stepper hardware/firmware =
	===status===		===status===
	~~http~~://www.youtube.com/~~watch~~?v=~~XcziyA8CrKI~~		<iframe width="640" height="360" src="https://www.youtube.com/embed//XcziyA8CrKI?feature=player_detailpage" frameborder="0" allowfullscreen></iframe>

	===grbl===		===grbl===

2013-07-08T16:20:27Z

Testing of open source stepper hardware/firmware

← Older revision		Revision as of 16:20, 8 July 2013
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	= Testing of open source stepper hardware/firmware =		= Testing of open source stepper hardware/firmware =
			===status===
			http://www.youtube.com/watch?v=XcziyA8CrKI

	===grbl===		===grbl===

2012-12-17T02:15:47Z

timing

← Older revision		Revision as of 02:15, 17 December 2012
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	* Independent-axis (homing code), 3 axes moving, ~54 usec		* Independent-axis (homing code), 3 axes moving, ~54 usec
	This suggests maximum step rate in standard mode is ~30K steps/sec; homing mode ~15K steps/sec.		This suggests maximum step rate in standard mode is ~30K steps/sec; homing mode ~15K steps/sec.
			----
	Measured timing performance of I2C GPIO [https://github.com/chuck-h/grbl/issues/4 unitary read]: 148usec. (TWI_FREQ 400kHz). This is the approximate latency from a limit or home switch actuation to its becoming visible to the grbl firmware.		Measured timing performance of I2C GPIO [https://github.com/chuck-h/grbl/issues/4 unitary read]: 148usec. (TWI_FREQ 400kHz). This is the approximate latency from a limit or home switch actuation to its becoming visible to the grbl firmware.

2012-12-17T02:03:26Z

grbl

← Older revision		Revision as of 02:03, 17 December 2012
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	Measured timing performance (execution time of stepper interrupt) [[User:ChuckH\|ChuckH]] 21:06, 16 December 2012 (CET)		Measured timing performance (execution time of stepper interrupt) [[User:ChuckH\|ChuckH]] 21:06, 16 December 2012 (CET)
	* Standard interpolator, linear movement block, 3 axes moving, ~29.5 usec		* Standard interpolator, linear movement block, 3 axes moving, ~29.5 usec
	* Independent-axis (homing code), 3 axes moving, ~~~350~~ usec ~~(surprisingly high!)~~		* Independent-axis (homing code), 3 axes moving, ~54 usec
	This suggests maximum step rate in standard mode is ~30K steps/sec; homing mode ~2K steps/sec.		This suggests maximum step rate in standard mode is ~30K steps/sec; homing mode ~15K steps/sec.

	Measured timing performance of I2C GPIO [https://github.com/chuck-h/grbl/issues/4 unitary read]: 148usec. (TWI_FREQ 400kHz). This is the approximate latency from a limit or home switch actuation to its becoming visible to the grbl firmware.		Measured timing performance of I2C GPIO [https://github.com/chuck-h/grbl/issues/4 unitary read]: 148usec. (TWI_FREQ 400kHz). This is the approximate latency from a limit or home switch actuation to its becoming visible to the grbl firmware.

2012-12-16T23:51:43Z

timing

← Older revision		Revision as of 23:51, 16 December 2012
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	==== timing ====		==== timing ====
			[[File:I2Ctiming.png\|thumb]]
	Measured timing performance (execution time of stepper interrupt) [[User:ChuckH\|ChuckH]] 21:06, 16 December 2012 (CET)		Measured timing performance (execution time of stepper interrupt) [[User:ChuckH\|ChuckH]] 21:06, 16 December 2012 (CET)
	* Standard interpolator, linear movement block, 3 axes moving, ~29.5 usec		* Standard interpolator, linear movement block, 3 axes moving, ~29.5 usec
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	This suggests maximum step rate in standard mode is ~30K steps/sec; homing mode ~2K steps/sec.		This suggests maximum step rate in standard mode is ~30K steps/sec; homing mode ~2K steps/sec.

	~~[[File:I2Ctiming.png\|thumb]]~~
	Measured timing performance of I2C GPIO [https://github.com/chuck-h/grbl/issues/4 unitary read]: 148usec. (TWI_FREQ 400kHz). This is the approximate latency from a limit or home switch actuation to its becoming visible to the grbl firmware.		Measured timing performance of I2C GPIO [https://github.com/chuck-h/grbl/issues/4 unitary read]: 148usec. (TWI_FREQ 400kHz). This is the approximate latency from a limit or home switch actuation to its becoming visible to the grbl firmware.