Cutting Head Connection-Details Required.
Cutting Head Connection-Details Required.
(OP)
Can someone give complete information regarding cutting head connection alarm of the machine(AMADA F0M2). Why it happens, how to avoid it, does it have to do anything with the way we program? Also if the machine has nearly 1600 cutting head connection alarms in a span of 5 months, What are the probable consequences?





RE: Cutting Head Connection-Details Required.
I don't know a lot about the system but I will tell you what I do know.
Air pressure is supplied to three ports ( maybe more or less ). When the head is where it should be the ports are sealed and air pressure is maintained. When the head breaks away, the pressure drops and a pressure switch is triggered generating an alarm.
If the mating surface is damaged, if the orings are missing, the ports leak air, and the pressure switch may be activated without an actual crash. One time I did see where the switch was out of adjustment. Changed the settings and the problem went away.
In my opinion, there is no way programming one way or another can cause the alarm unless you are crashing the head a lot.
The only other thing I can think of is if the nozzle gap, stand off, is too small. You would have to check pierce gap, edge gap approach gap and cutting gap. The smallest I go is 0.020 If the gap is too small the nozzle can drag causing the head to pull one way or the other.
RE: Cutting Head Connection-Details Required.
One reason is because of part tilting. The tilted part is hitting the head. One of our machines is "burning up" and the company is attributing the same to the number of head connections that has occurred. The same is due to improper programming as sometimes part gets tilted and hits the head. Kindly advise whether this can be controlled from a programmers perspective or is it purely a machine problem. Also how often in a day ,if you're running jobs, will you get cutting head alarm? Whether so many alarms have come due to part tilting, the same cannot be proven.
RE: Cutting Head Connection-Details Required.
RE: Cutting Head Connection-Details Required.
Any cut piece of metal smaller than 6" in the x direction should have a 0.05" tab.
The cutting head should never traverse over a part that has been cut. Amada calls it "cut avoidance" in the programming software. Sygmanest has something similar.
The laser operator need to set the last column on the right of the cutting conditions page to "standard". This should bring the head up 1" after every cut.
Yes, these steps make the machine move slower. But no slower than clearing cutting head connection alarms 20 times a shift.
Last. No amount of head connection alarms is acceptable. To answer your question, zero per day.
RE: Cutting Head Connection-Details Required.
1. Lens is cleaned.
2. Nozzle centering is ok.
3. Bellows have been checked and replaced.
4. Mirrors have been replaced.
RE: Cutting Head Connection-Details Required.
Another thing. The output coupler, and rear mirror are two of the most important optics in the machine. They should be replaced every 6,000 hours. Also, they have to be from a reputable company and installed by someone qualified.
The FOM2 is a fantastic machine. I am sorry to hear that you are having so much trouble.
RE: Cutting Head Connection-Details Required.
Causes for lens fire.
1. No assist gas
2. Assist gas pressure to low.
3. Plugged nozzle.
4. Pre focused beam (dirty mirrors)
5. Inadiquit lens cooling.
Shop air is too hot or a line is plugged.
6. The laser loses it's cut but the program keeps running.
RE: Cutting Head Connection-Details Required.
Cutting Head Connections are when a part tilts up whilst the head is moving in the direction. If the head touches the part thats tilted, it will move the alignment and also cause damange to the nozzle.
You will need to replace the nozzle every time and also adjust the nozzles center again.
We've also had it become when it does scrap cut. If the lead in as broken, leaving the part loose, or the skeleton has risen or dropped from being flat.
To help prevent it. Use thicker tags on parts. And if using scrap cut, make sure you tag the parts where the scrap cut goes.
In major cases, it can snap the aluminium heads. Which are approx £1200 to replace.
RE: Cutting Head Connection-Details Required.
These switches go bad. Over ten years we've had the switches replaced by Amada a few times. This is dated information so it may no longer be the latest but the Amada part number is 71392220. We bought them for half the price from mouser: http://www.mouser.com/ProductDetail/NKK-Switches/F...
When a switch was failing or had failed we would experience lots of head connection alarms under normal operation. Replacement is somewhat tedious so replace all three when in there.
RE: Cutting Head Connection-Details Required.
The sensor head is a sealed unit. They are made to be the weakest point and break if a part tilts to protect more expensive parts further up. They say more expensive, when a head is £1100!!
This obviously is an extreme example of the scenario, when most of the time with a cutting head connection, it means a new nozzle and to re-center the beam.
RE: Cutting Head Connection-Details Required.
RE: Cutting Head Connection-Details Required.
RE: Cutting Head Connection-Details Required.