willieal
New member
- Location
- south africa
Hi all,
Please could you help?
I am not an electrician, I am in the woodworking industry and I am having some issues with one of my machines.The machine is an edgebander.
In short it heats up glue pellets, applies it to a wooden panel in order for pvc edging to stick to it. Different motors then cut and trim the edging.The issue I am having is on the last set of motors which are the buffing motors. The have a 25mm thick cloth like disk spinning to buff off excess glue on top and bottom of the wooden panel.
I bought the machine about four months ago and everything was working fine. After two months the machine started tripping the overload relay on the buffing motors only. The machine is run for short periods of time anything from 10 min to 1 hour, at a time, as I stop the machine regularly to clean or insert glue or edging.
Every stage of the machine is switched on and off via its own start/stop switch. Thus the buffing motors have their own start and stop switch. What I noticed was that the overload does not trip immediately. It only happens when the machine has been running for a while. It also does not trip while running or when switched on, but when switched off. I then reset the overload relay, start the machine and continue edging. As soon as I switch the motors off it trips.
What I also noticed is that it does not trip early in the mornings. When I got the machine it was the begining of summer, now mid summer my workshop gets very hot inside plus the fact that this machine has a heated glue pot heating glue to over 140 degrees Celsius, it gets quite hot around the machine.
The motors in question are Y2Type: Asynchronous MotorFrequency: 50HZ,60HZOutput Power: 0.09kw-18.5kwPhase: Three-phase. The overload relay is a mec gth-22.
What I think is happening is the rising temperature in the workshop is adding either to the temp of the motors or overload relay. Will it help if I install a fan to try and keep the motors cooler or a fan to keep the overload relay cooler, and how will I know if the relay is set correctly?
Any advice will be appreciated.
Regards
Willie
Please could you help?
I am not an electrician, I am in the woodworking industry and I am having some issues with one of my machines.The machine is an edgebander.
In short it heats up glue pellets, applies it to a wooden panel in order for pvc edging to stick to it. Different motors then cut and trim the edging.The issue I am having is on the last set of motors which are the buffing motors. The have a 25mm thick cloth like disk spinning to buff off excess glue on top and bottom of the wooden panel.
I bought the machine about four months ago and everything was working fine. After two months the machine started tripping the overload relay on the buffing motors only. The machine is run for short periods of time anything from 10 min to 1 hour, at a time, as I stop the machine regularly to clean or insert glue or edging.
Every stage of the machine is switched on and off via its own start/stop switch. Thus the buffing motors have their own start and stop switch. What I noticed was that the overload does not trip immediately. It only happens when the machine has been running for a while. It also does not trip while running or when switched on, but when switched off. I then reset the overload relay, start the machine and continue edging. As soon as I switch the motors off it trips.
What I also noticed is that it does not trip early in the mornings. When I got the machine it was the begining of summer, now mid summer my workshop gets very hot inside plus the fact that this machine has a heated glue pot heating glue to over 140 degrees Celsius, it gets quite hot around the machine.
The motors in question are Y2Type: Asynchronous MotorFrequency: 50HZ,60HZOutput Power: 0.09kw-18.5kwPhase: Three-phase. The overload relay is a mec gth-22.
What I think is happening is the rising temperature in the workshop is adding either to the temp of the motors or overload relay. Will it help if I install a fan to try and keep the motors cooler or a fan to keep the overload relay cooler, and how will I know if the relay is set correctly?
Any advice will be appreciated.
Regards
Willie
