what cnc: fanuc heidenhain or siemens?
what cnc: fanuc heidenhain or siemens?
(OP)
My company wants to buy a CNC machine. We have an ofer for a Cincinnati CFV 1050 with 3 options:
1/ Siemens Sinumerik 810D, or
2/ GE Fanuc 18i-MB, or
3/ Heidenhain iTNC 530
I don't know the diferences among them to take a decisition. We are mold makers.
what do you think would be better?
thnxs in advance,
1/ Siemens Sinumerik 810D, or
2/ GE Fanuc 18i-MB, or
3/ Heidenhain iTNC 530
I don't know the diferences among them to take a decisition. We are mold makers.
what do you think would be better?
thnxs in advance,





RE: what cnc: fanuc heidenhain or siemens?
RE: what cnc: fanuc heidenhain or siemens?
The problem I have is that I am not able to determine what kind of control would be better.
RE: what cnc: fanuc heidenhain or siemens?
You did not describe the type of work you would be doing, that may have an impact on the decision.
Do you have an opinion on Fagor?
RE: what cnc: fanuc heidenhain or siemens?
I have a Fagor control 8050 but I'm limited. When I try to work by point postprocessed tape, the feedrate is limited to 2500 mm/sg aprox. The 8050 has very little go-ahead procesing. Anyway the ISO code it's not relevant since the postprocessor takes care of it. We don't program directly the CNC.
About the type of work. We are mold makers, from miniaturized piezes (toys, collection trains,...) to small automovilistic components (molds as long as 550 milimeters).
We machine cavities, cores,... everything in CNC.
RE: what cnc: fanuc heidenhain or siemens?
RE: what cnc: fanuc heidenhain or siemens?
RE: what cnc: fanuc heidenhain or siemens?
RE: what cnc: fanuc heidenhain or siemens?
RE: what cnc: fanuc heidenhain or siemens?
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I have heard good things about them, your support more than likely will be better... they would more than likely be willing to deal on price
Maybe the new rev of cinnci's are better, we have had some older models and I'm not real fond of them.
As far as a post... you have ProE... I take you have Pro/Man so you should be able to tweak a post fairly easily
3 axis.. Fanuc..... more than 3 .. you might consider the others... but that model is 3 axis... but you are in Europe... I just feel Fanuc ..nickle and dimes you to death for memory,options...etc
RE: what cnc: fanuc heidenhain or siemens?
Regards
RE: what cnc: fanuc heidenhain or siemens?
RE: what cnc: fanuc heidenhain or siemens?
As soon as you power up is there a fault displayed?
Double check all the parameters to make sure they are correct.
Give me some idea how you checked the D/A converter to make the conclusion it's ok.
What type of servo drives does the machine tool use? just curious.
Does the control show a large ampount of lag <following error> as soon as its turned on?
More info and suggestions to follow
Regards
RE: what cnc: fanuc heidenhain or siemens?
Initially there is no error message in the display, the first thing I do is to select the manual mode to check if there is movement in the 3 axis, the axis x and y move normally, but the motor of axis z start to oscillate as soon as I supply power to the motors, when I checked the output of speed references in the NUM 720, I have 0 volts on axis x and y, and 10 volts in axis z.
I dismantled the num and extracted the DA converter and its associated opamp, I tested this components in a protoboard, and they work Ok, since all the outputs share a common bus, I assumed that the DA conv was the fault...
Now I'm thinking that maybe I have a software problem..What do you think?
RE: what cnc: fanuc heidenhain or siemens?
RE: what cnc: fanuc heidenhain or siemens?
The fact that the machine is oscillating tells me the problem is in the position feedback.
If possible swap the encoder's or feeback between axis.
I'm assuming the machine was running and this is a failure and not the result of the machine being moved and a possible wiring error.
Are you using Num servo drives with resolver feedback?? There is a procedure for setting up the resolvers depending on the type used.
Are they Num motors as well??
Regards
RE: what cnc: fanuc heidenhain or siemens?
If I disconnect the power to the z axis motor, the display registers an increasing error in the z axis.
I tested the servo driver-motor-tachogenerator set by disconnecting the speed reference from the cnc and applying a variable DC voltage to the speed reference of the servo drive, the motor responds ok, it does not oscillate, and it runs faster on higher voltage, and slower on lower voltages, if I reverse the voltage, the motor runs backwards.
The motor is not a num one, and the servodrive is a minimaestro. The speed feedback is supplied by a tacho generator wich is part of the motor.
I tested the encoder by manually moving the axis, and it register the forward and backwards movements.
RE: what cnc: fanuc heidenhain or siemens?
When I test a control with no motors or drives I just set the parameter that controls the amount of following error allowed before a fault display. This allows me to test all the jog functions I have written to the plc.
Have you verified all the paramters are correct?
Do you have a way of getting into the plc software?
You need to figure out a way by swapping cables to make the Z axis into the Y or X, swap feedback and speed reference from the control, Im sure this would work to only prove you have a hardware problem in the cnc.
You can also contact Num direct @630-505-7722 tell them Dave B. sent you.
Let me know if I can be of further help
Regards
RE: what cnc: fanuc heidenhain or siemens?
The plc's backup battery was discharged, I assumed that this was not relevant...
Where can I get detailed info about the Num (diagrams, software, utilities,etc).
THANKS A LOT FOR YOUR HELP!!!!!
RE: what cnc: fanuc heidenhain or siemens?
Did you call up the parameter page??
You need to validate all of this before anything can be done
Regards
RE: what cnc: fanuc heidenhain or siemens?
If so let us know
Regards
RE: what cnc: fanuc heidenhain or siemens?
RE: what cnc: fanuc heidenhain or siemens?
RE: what cnc: fanuc heidenhain or siemens?
Finally they settled to cover the costs of the technitian to come over, they sent some one from Philipines he came reset a thermal switch which was hidden in a secondary control box and they had to pay almost 8K US$ for expenses of the travelling visitor.
Maybe you can get better service with the German suppliers.
Cheers
SACEM1