USB-step - Revision history

Rew: /* programming/protocol */

2016-03-17T16:00:02Z

programming/protocol

Rew: /* programming/protocol */

2016-03-17T15:59:23Z

programming/protocol

Rew: /* programming/protocol */

2016-03-17T15:58:54Z

programming/protocol

Cartridge1987 at 15:57, 18 January 2016

2016-01-18T15:57:50Z

Cartridge1987: /* programming/protocol */

2016-01-18T15:16:06Z

programming/protocol

Cartridge1987: /* programming/protocol */

2016-01-08T12:46:12Z

programming/protocol

Cartridge1987: /* pinout */

2016-01-08T12:17:04Z

pinout

Cartridge1987 at 10:57, 6 January 2016

2016-01-06T10:57:58Z

Rew: /* programming/protocol */

2016-01-01T14:59:46Z

programming/protocol

Rew: /* programming/protocol */

2016-01-01T14:13:36Z

programming/protocol

@@ Line 52: / Line 52: @@
 For adjusting the clock setting you must know that the board uses microsteps. It won't drive the motor with better than "full step" resolution, but it uses very small steps internally. The motor will make a full revolution every 34190060316 of these internal steps. The motor is actually stepped when the accumulated number of steps internally exceeds 2^24 = 16777216. So at the slowest setting, 1 internal microstep per second, the motor wil be issued a step every 2^24 seconds (about twice a year), resulting in a full revolution every milennium.
-More useful settings for the steps-per-second setting (adjusted through the clock command) is 34190060316/60 = 569834339 to make a full revolution every 60 seconds. Another option is to set it to 37988956 = 34190060316/60/15 to make a full revolution every 15 minutes. This is used by Oskar van Deventer's tower-gear-clock to drive the minute-hand of the clock through a 1:4 reduction gear in the clock.
+More useful settings for the steps-per-second setting (adjusted through the clock command) is 34190060316/60 = 569834339 to make a full revolution every 60 seconds like the seconds-hand of a clock. Another example is to set it to 37988956 = 34190060316/60/15 to make a full revolution every 15 minutes. This is used by Oskar van Deventer's tower-gear-clock to drive the minute-hand of the clock through a 1:4 reduction gear in the clock.
 The time required for each step limits the fastest possible stepping rate. You can experiment with reducing the "step" times with the '''step''' command to see what is the fastest possible step rate with your load.

@@ Line 52: / Line 52: @@
 For adjusting the clock setting you must know that the board uses microsteps. It won't drive the motor with better than "full step" resolution, but it uses very small steps internally. The motor will make a full revolution every 34190060316 of these internal steps. The motor is actually stepped when the accumulated number of steps internally exceeds 2^24 = 16777216. So at the slowest setting, 1 internal microstep per second, the motor wil be issued a step every 2^24 seconds (about twice a year), resulting in a full revolution every milennium.
-More useful settings for the steps-per-second setting (adjusted through the clock command) is 34190060316/60 = 569834339 to make a full revolution every 60 seconds. Another ootion is to set it to 37988956 = 34190060316/60/15 to make a full revolution every 15 minutes. This is used by Oskar van Deventer's tower-gear-clock to drive the minute-hand of the clock through a 1:4 reduction gear in the clock.
+More useful settings for the steps-per-second setting (adjusted through the clock command) is 34190060316/60 = 569834339 to make a full revolution every 60 seconds. Another option is to set it to 37988956 = 34190060316/60/15 to make a full revolution every 15 minutes. This is used by Oskar van Deventer's tower-gear-clock to drive the minute-hand of the clock through a 1:4 reduction gear in the clock.
 The time required for each step limits the fastest possible stepping rate. You can experiment with reducing the "step" times with the '''step''' command to see what is the fastest possible step rate with your load.

@@ Line 35: / Line 35: @@
 Use your favorite serial-communciation program to connect to the VCP. (I suggest Minicom/Kermit for Linux users, putty for windows-users).
-you'll be presented with a commandline interface. The "help" command lists the available commands.
+you'll be presented with a commandline interface. The "help" command lists the available commands. Some debugging commands beyond the ones listed here may be present.
 '''clock''' lists or sets the "steps-per-second" setting.
@@ Line 46: / Line 46: @@
 '''step''' allows setting the time that the motor is activated/stepping speed. Times are in ms.
+'''def''' reads the default settings into the current settings variables.
 For adjusting the clock setting you must know that the board uses microsteps. It won't drive the motor with better than "full step" resolution, but it uses very small steps internally. The motor will make a full revolution every 34190060316 of these internal steps. The motor is actually stepped when the accumulated number of steps internally exceeds 2^24 = 16777216. So at the slowest setting, 1 internal microstep per second, the motor wil be issued a step every 2^24 seconds (about twice a year), resulting in a full revolution every milennium.
+More useful settings for the steps-per-second setting (adjusted through the clock command) is 34190060316/60 = 569834339 to make a full revolution every 60 seconds. Another ootion is to set it to 37988956 = 34190060316/60/15 to make a full revolution every 15 minutes. This is used by Oskar van Deventer's tower-gear-clock to drive the minute-hand of the clock through a 1:4 reduction gear in the clock.
 The time required for each step limits the fastest possible stepping rate. You can experiment with reducing the "step" times with the '''step''' command to see what is the fastest possible step rate with your load.

@@ Line 31: / Line 31: @@
 When you insert the board into your PC, you will get a virtual com port (VCP).
-Under Windows you should get a device for which "no driver could be found". install [http://forum.chibios.org/phpbb/download/file.php?id=968&sid=1ea558897dff1ee77df5aa87ad6a008a this driver], and you will get a virtual com port.
+Under Windows you should get a device for which "no driver could be found". install [http://www.bitwizard.nl/software/cdc.zip this driver], and you will get a virtual com port.
 Use your favorite serial-communciation program to connect to the VCP. (I suggest Minicom/Kermit for Linux users, putty for windows-users).

@@ Line 31: / Line 31: @@
 When you insert the board into your PC, you will get a virtual com port (VCP).
-Under Windows you should get a device for which "no driver could be found". install XXX this driver, and you will get a virtual com port.
+Under Windows you should get a device for which "no driver could be found". install [http://forum.chibios.org/phpbb/download/file.php?id=968&sid=1ea558897dff1ee77df5aa87ad6a008a this driver], and you will get a virtual com port.
 Use your favorite serial-communciation program to connect to the VCP. (I suggest Minicom/Kermit for Linux users, putty for windows-users).

@@ Line 18: / Line 18: @@
 The JST power connector is something like
 - 5V
 - A+
 - B+
 - A-
 - B-
 == default ==

← Older revision		Revision as of 10:57, 6 January 2016
Line 1:		Line 1:
			[[File:usbstep.jpg\|thumb\|300px\|alt=The USB_stepper board\|The USB_stepper board]]

	= USB-step =		= USB-step =

@@ Line 44: / Line 44: @@
 '''step''' allows setting the time that the motor is activated/stepping speed. Times are in ms.
+For adjusting the clock setting you must know that the board uses microsteps. It won't drive the motor with better than "full step" resolution, but it uses very small steps internally. The motor will make a full revolution every 34190060316 of these internal steps. The motor is actually stepped when the accumulated number of steps internally exceeds 2^24 = 16777216. So at the slowest setting, 1 internal microstep per second, the motor wil be issued a step every 2^24 seconds (about twice a year), resulting in a full revolution every milennium.
+The time required for each step limits the fastest possible stepping rate. You can experiment with reducing the "step" times with the '''step''' command to see what is the fastest possible step rate with your load.
+== current usage ==
+the board uses about 120mA per motor-phase that is activated. Normally only one is activated at a time. The motor is powered off between the movements. We measured about 12mA "in rest", Add to that (by default) about 1% times 120mA, the total average power is around 13-14 mA.
 == future ==

@@ Line 36: / Line 36: @@
 '''clock''' lists or sets the "steps-per-second" setting.
 '''cal''' lists or sets the crystal calbration.
 '''write''' writes the current settings to flash.
 '''pat''' allows setting the activation pattern. For forward use: 4 1 2 4 8, for reverse use "4 8 4 2 1" as the arguments.
 '''step''' allows setting the time that the motor is activated/stepping speed. Times are in ms.
 == future ==