Muzete mi nekdo pls poradit jak je to s motorama? Koukam na tohle:
Stepper motor, NEMA23, 0.9° per step, 1.7 A, 9000 g·cm - Amber Spyglass Ltd
http://store.amberspyglass.co.uk/51mm-nema23-stepper-motor-400step-per-rev.html
Pisou tam:
These motors are manufactured especially for us: we specified a current rating of 1.7 A, which allows small drivers to achieve optimum performance. Commonly available NEMA 23 motors tend to be rated 2 A and above, better suitable for larger drivers such as TB6560 and TB6600. This 1.7 A motor is perfect for Allegro A4983 and A4988, and Texas Instruments DRV8811, DRV8818 and DRV8825.
Ma to znamenat, ze kdyz si koupim stepper co ma rating 3A, ale dvakrat vetsi nominalni kroutak, tak pri tech 1.7A bude mit horsi vlastnosti nez ten co je na 1.7A stavenej, ale kroutak ma polovicni?
Vyse uvedenej ma cca 0.8Nm pri 1.7A, a pro srovnani dejme tomu tahle cina 1.9Nm pri 3A:
EU Free shipping! Stepper Motor 4pcs Nema 23 270oz.in=1.9NM single shaft 3A 23HS8430 CNC Kit LONGS MOTOR-in Stepper Motor from Home Improvement on Aliexpress.com | Alibaba Group
https://www.aliexpress.com/...Ship-4pcs-Nema23-Stepper-Motor-270oz-in-3-0A-23HS8430/32401914998.html
Jde mi o to, ze pololu drivery davaj s chladicem az 2A a tak bych se nemusel bat, ze ten 1.7A motor odpalim pri spatnym nastaveni. Zaroven by tam byla naka rezerva, kdybych dejme tomu casem upgradoval 3A drivery...
Akorat je teda nutne podotknout, ze ten cinskej toho samyho dosahuje s dvakrat vetsim krokem (mensi presnosti), takze je klidne mozny, ze dvojitej kroutak nema diky dvojitymu proudu, ale diky vetsim krokum. Nevim... rad bych si precet od vas nejaky rady...