What do BP S1 CNC ACC-board?

[Jonne]

What is ACC-boards purpose?
How I can test it? ( I read somewhere,
flipping board on connector, x and z change place. But I don' mean that,
some ratings or behaviour of board will be nice. )
And last question: Where I can measure stepper amps? Fuseholder No. ?

Johannes

[servocontroller]

Acc board is used to control the DC voltage input of the saturable core reactor which in turn controls the large current flowing to the motor under normal conditions (not sure) approx 8 amp of current is flowing in the steppers in order to maintain their position.

You can measure the current using clamp Meter.

My BP series 1 is not having one reactor So in the near time I am going to study thorougly the signal from ACC board and the response of the reactor.

i am thinking of replacing reactors with Triacs.

[keebler303]

the above is correct. The current can be measured by removing fuse 12,13,14 which correspond to x,y,z and inserting an ammeter across the terminals. The potentiometers on the ACC board are used to adjust the current. It should be around 8-8.2 amps. Make sure not to disconnect anything while the machine is on, bad things may happen.

Matt

[servocontroller]

I just want to get rid of these reactors is it possible?

because advance axis drives use mosfets instead of transistors and opamps for current limiting

[Jonne]

Thanks everyone, machine working right now, only that one of
smd board is faulty...