5 replies to this topic

[labview1958]

I have a 4 phase unipolar stepper motor driveboard. It's auxillary supply is rated 12V dc and 50 mA. I also have a 88.0 N linear actuator. It's nominal voltage(L/R) is rated at 12V dc. It's current per phase is 453 mA and resistance per phase 25 ohms. I have connected the linear actuator to the auxillary supply. To my surprise it works! How can 50mA run a device rated 453mA? I might have mistaken some wiring. Is it possible

[Praetorian]

I have a 4 phase unipolar stepper motor driveboard. It's auxillary supply is rated 12V dc and 50 mA. I also have a 88.0 N linear actuator. It's nominal voltage(L/R) is rated at 12V dc. It's current per phase is 453 mA and resistance per phase 25 ohms. I have connected the linear actuator to the auxillary supply. To my surprise it works! How can 50mA run a device rated 453mA? I might have mistaken some wiring. Is it possible

Hi Labview1958, I saw a reply by one Chris Chan stating that he's more tan 20 years in the motion control industries, maybe he's able to explain...

[labview1958]

Can you give mt the e-mail for chris chan.

[markmeng]

I guess your linear actuator is not connected with any load. The 453mA rated current means, to produce 88N force, it needs 453mA current, and the actuator can work under THIS condition continuously without getting over-temperature. If you do not have load and do not apply high acceleration/deceleration, the actutor only needs to produce very little force, which requires very little current. Furthermore, the 50mA driveboard can produce more than 50mA for a short period also.

[M.Pathma]

I have a 4 phase unipolar stepper motor driveboard. It's auxillary supply is rated 12V dc and 50 mA. I also have a 88.0 N linear actuator. It's nominal voltage(L/R) is rated at 12V dc. It's current per phase is 453 mA and resistance per phase 25 ohms. I have connected the linear actuator to the auxillary supply. To my surprise it works! How can 50mA run a device rated 453mA? I might have mistaken some wiring. Is it possible

Hi,

Did you connect any load, without loading it may posible, but if loaded the system "should not work", unless your 50mA is acutally 500mA

Regards
M.Pathma

[labview1958]

Someone told me it can work but can only move a load of (50/250)*88 = 18N or 1.8 kg. Is that true?