SherlineCNC : Sherline CNC

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This Group is dedicated to those running CNC on a Sherline lathe or mill. Share your projects, tips, problems. Also see SherlineCNC2 for additional files.

Alan KM6VV

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2.7k resistors for 2.8 amp motors, Close enough? ... 2.7K will be fine. There are lots of tolerances in the drive, you might be slightly reducing your motors torque, but I suspect by so small an amount you Posted - Fri May 25, 2012 1:23 pm	Ron Ginger yaginger Offline Send Email
Re: 2.7k resistors for 2.8 amp motors, Close enough? ... Knowing the possible variance, I grabbed my Fluke and probed my collection of 2.7s until I found a few that were extremely close to 2.8k. I think you need Posted - Fri May 25, 2012 12:54 pm	Thayer Syme tcsyme Offline Send Email
Re: 2.7k resistors for 2.8 amp motors, Close enough? Hi Brandon, The resistor controls the current that the 540 outputs. So it is safe to use a resistor that gives less current than what the stepper will take but Posted - Fri May 25, 2012 11:04 am	Hamilton Elliott ei_ell Offline Send Email
Re: 2.7k resistors for 2.8 amp motors, Close enough? Hi Brandon, 2.7K is close enough. I doubt that you would notice any difference at all. It's 3.5% less. If you were to use a 5% 2.8K resistor it could be Posted - Fri May 25, 2012 10:06 am	Peter Homann homannp Offline Send Email
2.7k resistors for 2.8 amp motors, Close enough? I am hooking up some 2.8 amp/phase motors to a gecko g540, it calls for a resistor across pin 1 and 5. For a 2.8 amp motor it says I will need a 2.8k 5% 1/4w Posted - Fri May 25, 2012 9:03 am	BrandonB brandonblizard Offline Send Email
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