Hurco Question

[daveelc]

Hi Guys,

Found a Hurco MB1 that is going cheap but has a problem. I don,t know if any of you have any ideas.

Turn the machine on and it will jog on all axis but the moment you stop it comes up with an positioning error. The owner has sent off all the boards to be checked and they say they are OK.

They have come back been refitted but with the same problem.

This machine belonged to a toolmaker friend of mine and I know its history.
It was sold to factory next door to him, was working fine up until it was moved but had this problem ever since. All the wiring seems to be intact.

Anybody got any ideas, it would be much appreciated.

Dave

[Karl_T]

I have a different control. I've gotten position errors from a bad encoder module/ bad encoder wiring connections.

Karl

[daveelc]

Thanks Karl,

I,ve been thinking along those lines, just wanted to find out if it's a regular problem and peoples experiences.

The guy that has got the machine has spent so much money on it, there can only be something simple left to do.

Been a stepper man in the past, servo's are all a bit new to me.

Thanks again,

Dave

[hurcojohn]

what is the error message exactly...by chance is it motion error?...if so clean your motors out (carbon buildup)...might also need to balance amps...let me know error on crt...

[daveelc]

Hurcojohn,

I should be taking delivery of the machine on FRIDAY when I get it powered up I will post the exact read out.

Thanks
Dave

[daveelc]

Hurcojohn,

Just got the machine in place in my shop ( Had to take afew bricks out and raise the roof in the entrance, all good fun)

Hoping to power it up later today.

Will post screen read out as soon as.

Dave

[daveelc]

Hi Guys,

Finally got the Hurco powered up and here is how far I can get:

Load Master Disc and machine will power up.

Manual jog X,Y,Z at any speed no problem, position read out, feed rate all OK on screen.

Spindle starts no problem.

Press X,Y Home and only the X axis moves right until it reaches the limit switch pauses for a second before Motion Error comes up on screen .

At this point no further movement available until the machine is re-booted.

Any ideas or help would be much appreciated.

Dave

[jfc11]

What control do you have

[jfc11]

Sorry just seen you said....i have a mb1 on the face of the table on the right hand side there is a sensor...make sure the adjustment on the hard stop is close to the sensor when it passes by....if it is hitting it will get a motion error or if it is to far away...you must have the upgraded bx board which reads a 4 decimal place...on that board it home the x first and then the Y...here is a web site to the people I have repair my machine...the have great phone support...hope this helps http://www.midwestcnc.com/

[daveelc]

Hi Guys,

Back again, been playing with the MB1, mainly just getting familiar with things.

Also about to check the motors for carbon dust that may have become dislodged in the move(Thanks Hurcojohn).

One on the encoder wheels looks damaged, does any body know if they are available from any where, Hurco UK tell me they are obsolete and want loads of money for complete encoder.The servos have a 1/2" shaft out the back.
The encoder disc is attached over that and the body mounted with 2 screws to motor/tacho body.

They were originally manufactured by Litton Pt No.
30036-001, Hurco Pt No. 416-0248-025

Any idea how many lines the originals have?
The replacement ones that Hurco UK offered are apparently 1000 line encoders, Pt No.002-1810-002


Anybody know of a good alternative encoder in the market place either in the UK or Stateside, new or secondhand. And when replacing an encoder is it just a case undo and do-up the screws or is position on the motor body relative to encoder wheel vital.

Thanks to all for your contributions.

Dave