Bosch Z15 board help .

[Paul cs]

Hi

Any known cause of faiulre on the Bosch Z15 boards, this is the third one to go on my ser 2 interact, and as I only use it for a hobby it's becoming expensive.

Looking to buy one too, if anyone has one to sell.

Thanks in advance,

Paul, UK.

[gridley51]

You must have a problem if it keeps blowing boards.I have found these Bosch drives very reliable.Is it the same one all the time? Who have you been using to repair them?
Are you running it of single phase?
Mark.

[gus]

I have not had one fail, and have several tested good spares.

Different axis? Same? Bad servo motor?

One of my machines I have owned for 16 years...

[Paul cs]

Thanks guys

No, the X axis went first, then the Y, and now the Y axis again, but I had a problem with this board from when it was fitted, tripped out on rapid but got around this with a lower rapid speed just to get up and running again.

The machine will still pass over all axis on start up, but after a few seconds 2 of the 4 led,s go out on the card.

The first board was new, the second was just second hand.

It,s run off a 3 phase supply, I thought it might be down to not been used on a regular basis ?

Paul.

[gridley51]

I don`t think it`s down to not getting used very often.I have an Interact that can sit for weeks in a damp building without getting used and never have any problems with it.If it has brushed servos,take the brushes out,check the length of them and that they are free in the holders.While they are out blow the carbon out the motors.Carbon dust kills dc drives by allowing large currents to flow and is the most common cause of older style drives failing.
Mark.

[Paul cs]

Thanks Mark,

I had the back off the servo first thing today, made sure there was no loose wires, and had a look at the brushes, after a clean out with the blow gun it fired up, left it to run a program with no problems.

Will still look for a spare drive board though, had this before, ok for a few days then throws it's hand in.

Paul.

[gridley51]

Next thing to check is the drive settings.Someone may have been tampering and asking it to do more than it should.Have you got setting up info for these drives.I should have something.Where in the UK are you?There`s a good guy for spares down the south midlands also repairs these things,not the cheapest but good.I also know an ex Bridgeport service guy down there somewhere.

[Paul cs]

Thanks Mark

I have all the info to set up the drives, it was the first thing i done.
The machine was working ok all day wednesday, turned it on yesterday and the same problem, pass over all reference points fine, then as soon as you try and move off ,it trips out GROSS POSITIONING ERROR, changed the card over yesterday to the x axis and it worked fine, turned it on today same problem from start up, but on the x axis, were the card is still fitted.

Paul.