參數(shù)資料
型號： TMC428
廠商： Electronic Theatre Controls, Inc.
英文描述： Intelligent Triple Stepper Motor Controller with Serial Peripheral Interfaces
中文描述： 三步進電機智能控制器的串行外圍接口
文件頁數(shù)： 17/50頁
文件大?。?/td> 378K
代理商： TMC428
TMC428 DATA SHEET (V. 1.00 / February 12, 2001)
17
Copyright 2000, TRINAMIC Microchips GmbH
M I C R O C H I P S
17
is_agtat & is_aleat & is_v0 & a_threshold (IDX=%1000)
These parameters represent current scaling values I
s
and are applied to the motor depending on the ramp
phase: The parameter
is_agtat
is applied if the acceleration (a) it greater than (gt) a threshold acceleration
(a
t
). This is to increase current during strong acceleration. The parameter
is_aleat
is applied if the
acceleration is lower equal (le) than the threshold acceleration. This is the nominal motor current. The
third parameter
is_v0
is applied if the stepper motor is at rest, to save power, to keep it cool, and to avoid
noise probably caused by chopper drivers. The parameter
a_threshold
is the threshold used to compare
with the current acceleration to select the current scale factor. The three parameters
is_agtat, is_aleat
,
and
is_v0
are bit vectors of three bit width. One of these is selected conditionally and assigned to an
interim bit vector
i_scale
. The current scaling factor I
s
is defined in Table 6.
i_scale
I
s
1
0
0
0
0
0
1
1 / 8
2 / 8
3 / 8
4 / 8
5 / 8
5 / 8
7 / 8
0
1
0
0
1
1
1
0
0
1
0
1
1
1
0
1
1
1
Table 6 - Current Scale Factors
One of the three scale factors
is_agtat, is_aleat
, and
is_v0
is selected according to Table 7. If the velocity
is zero, the parameter
is_v0
is used for scaling. If the velocity is not zero, either
is_aleat
or
is_agtat
is
used for scaling, depending on the absolute value of the acceleration and the acceleration threshold
a_threshold
.
v
=
0
I
s
:=
is_v0
I
s
:=
is_aleat
I
s
:=
is_agtat
|a |
=
a
threshold
|a |
>
a
threshold
v
0
Table 7 - Current Scale Selection Scheme
The automatic motion dependent current scale feature of the TMC428 is provided primarily for micro step
operational mode. But it may also be applied for full step or half step drivers, if those provide current
control bits. For those drivers, one could initialize the micro step tabular with a constant function, square
function or sine wave using the two most significant DAC bits.
pmul & pdiv (IDX=%1001)
The stepper motors are driven with a trapezoidal velocity profile, which may become triangular if the
maximum velocity is not reached (see Figure 7, 15). Depending on the difference between the target
position
x_target
and the actual position
x_actual
, the ramp generator continuously calculates target
velocities
v_target
for the pulse generator (see
Figure 8
, page 18). The pulse generator then generates
(micro) step pulses taking into account the motion parameter limits (
v_min
,
v_max
,
a_max
). With a
target velocity proportional to the difference of target position
x_target
and current position
x_actual
,
相關(guān)PDF資料
PDF描述
TMD0305-2 Microwave Power GaAs MMIC(微波功率砷化鎵MMIC)
TMD1414-2C MICROWAVE POWER MMIC AMPLIFIER
TMD3438-1 Microwave Power MMIC Amplifier(微波功率MMIC（單片式微波集成電路）放大器)
TMG5CQ60F TRIAC(Through Hole/Isolated)
TMM23256P 256K BIT(32K WORD x 8 BIT) MASK ROM N-CHANNEL SILICON GATE
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TMC428_06 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Intelligent Triple Stepper Motor Controller with Serial Peripheral Interfaces
TMC4281GT 制造商:ADAM-TECH 制造商全稱:Adam Technologies, Inc. 功能描述:SCREW MACHINE SOCKETS & TERMINAL STRIPS
TMC4281TT 制造商:ADAM-TECH 制造商全稱:Adam Technologies, Inc. 功能描述:SCREW MACHINE SOCKETS & TERMINAL STRIPS
TMC4282GT 制造商:ADAM-TECH 制造商全稱:Adam Technologies, Inc. 功能描述:SCREW MACHINE SOCKETS & TERMINAL STRIPS
TMC4282TT 制造商:ADAM-TECH 制造商全稱:Adam Technologies, Inc. 功能描述:SCREW MACHINE SOCKETS & TERMINAL STRIPS
發(fā)布緊急采購，3分鐘左右您將得到回復。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*