How is the "New Hobbycnc" board working?

[Ron111]

By now there should be some new boards out there in service. How are they working? Are your stepper motors cooler? Let us know what you think.

I use one of these the old boards (2 month ago) on a 9 X 20 lathe, and with no step or dir signals being sent, my steppers sounded like they both had a "slow air leak". Any one else experience this? The drivers worked great, just took a little time to get used to the hiss. (I was using keling steppers nema 23 282in/oz and 425in/oz)

Thanks,

Ron

[rippersoft]

The "chopper" boards are suppose to make the steppers hiss. I would think that my mill is broke if it doesn't hiss. Also, the more voltage you apply to the system and to the motors, the more heat gets generated.

RipperSoftware

[dertsap]

what is the hiss , i m running geckos and the hiss was worrying me , i ran a fet3 and never had that

[rippersoft]

The hiss is a byproduct of the chips used to do current limiting. The Fet-3 uses resistors to current limit.

RipperSoftware

[dertsap]

The hiss is a byproduct of the chips used to do current limiting. The Fet-3 uses resistors to current limit.

RipperSoftware

i understand that , but what is the hiss ?,is it unused power disipating from the motor ?

[rippersoft]

That is the sound of the chopper frequency. Power is being dissipated thru the controller chips on the board.

[dertsap]

gotgha thanks , i was worried i had the wrong resistors at one point

[Ron111]

Back to the original question, any feed back on the new boards?

Ron

[massajamesb]

I will have mine in today, Monday, I hope. I should have it soldered up and tested by tomorrow evening, I will make sure and get on here and let everyone know what I think, for what that is worth. I have high hopes, given that I liked the old board I bought from him. This one is supposed to be way better.

[johnnyb]

Just build a hobbycnc board about 4 or 5 months ago, I don't think it is the new version. I was planning on running it with a 48v power supply that I was able to turn down to 42v which was the published max voltage for the board, but I have seen some post in the past few weeks about 42v burning out the chip?

Should I be concerned? Is there a way to add the chip protection to older designs?

Thanks all,
John

[HobbyCNC]

Just build a hobbycnc board about 4 or 5 months ago, I don't think it is the new version. I was planning on running it with a 48v power supply that I was able to turn down to 42v which was the published max voltage for the board, but I have seen some post in the past few weeks about 42v burning out the chip?

Should I be concerned? Is there a way to add the chip protection to older designs?

Thanks all,
John

No way to add chip protection to the older 4UAPC boards. It is for open or shorted stepper coils only. Nothing to do about voltage.

42VDC absolute MAX...be careful of line voltage voltage variances! NOT much more speed than 36VDC.

HobbyCNC.com

[johnnyb]

Thanks Dave! Will see if I can get the voltage turn down a bit, if I remember 41v was the lowest I could get out of it.

John