 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
TMC260 Datasheet(PDF) 10 Page - TRINAMIC Motion Control GmbH & Co. KG. |
|
||||||||||||||||||||||||||||||
TMC260 Datasheet(HTML) 10 Page - TRINAMIC Motion Control GmbH & Co. KG. |
|
|
10 / 53 page  TMC260 and TMC261 DATASHEET (Rev. 2.05 / 2012-NOV-05) 10 www.trinamic.com Status word Description Range Comment SG 10-bit unsigned integer stallGuard2 measurement value. A higher value indicates lower mechanical load. A lower value indicates a higher load and therefore a higher load angle. For stall detection, adjust SGT to return an SG value of 0 or slightly higher upon maximum motor load before stall. 0… 1023 0: highest load low value: high load high value: less load 4.1 Tuning the stallGuard2 Threshold Due to the dependency of the stallGuard2 value SG from motor-specific characteristics and application- specific demands on load and velocity the easiest way to tune the stallGuard2 threshold SGT for a specific motor type and operating conditions is interactive tuning in the actual application. The procedure is: 1. Operate the motor at a reasonable velocity for your application and monitor SG. 2. Apply slowly increasing mechanical load to the motor. If the motor stalls before SG reaches zero, decrease SGT. If SG reaches zero before the motor stalls, increase SGT. A good SGT starting value is zero. SGT is signed, so it can have negative or positive values. 3. The optimum setting is reached when SG is between 0 and 400 at increasing load shortly before the motor stalls, and SG increases by 100 or more without load. SGT in most cases can be tuned together with the motion velocity in a way that SG goes to zero when the motor stalls and the stall output SG_TST is asserted. This indicates that a step has been lost. The system clock frequency affects SG. An external crystal-stabilized clock should be used for applications that demand the highest precision. The power supply voltage also affects SG, so tighter regulation results in more accurate values. SG measurement has a high resolution, and there are a few ways to enhance its accuracy, as described in the following sections. 4.1.1 Variable Velocity Operation Across a range of velocities, on-the-fly adjustment of the stallGuard2 threshold SGT improves the accuracy of the load measurement SG. This also improves the power reduction provided by coolStep, which is driven by SG. Linear interpolation between two SGT values optimized at different velocities is a simple algorithm for obtaining most of the benefits of on-the-fly SGT adjustment, as shown in Figure 4.2. An optimal SGT curve in black and a two-point interpolated SGT curve in red are shown. back EMF reaches supply voltage optimum SGT setting Motor RPM (200 FS motor) stallGuard2 reading at no load 2 4 6 8 10 12 14 16 100 200 300 400 500 600 700 800 900 1000 18 20 0 0 50 100 150 200 250 300 350 400 450 500 550 600 lower limit for stall detection 4 RPM simplified SGT setting Figure 4.2 Linear interpolation for optimizing SGT with changes in velocity. |
Similar Part No. - TMC260 |
|
Similar Description - TMC260 |
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.NET |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
