• This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn more.
  • Guest,  We want to wish You and Your Family a Healthy, Happy Thanksgiving! Click the "X" at the top right corner to remove this notice)
  • PLEASE: Read the FORUM RULES BEFORE registering!

4

G400 question

3
Like what you see?
Click here to donate to this forum and upgrade your account!
10

Martin22250

Iron
Registered Member
Joined
Jan 16, 2017
Messages
19
Likes
3
#1
I have a less than one year old g4003g, it sounds like the motor has a rattle noise that don't change with spindle speed, same noise wether full speed or 70 rpm. Check motor mounts and belt tension, and the thin motor cover for the power wire is tight also, works fine just has me curious. Also my machine has a light hum even when the red power button is pushed in, I just keep the breaker off when not using it to be safe.
Don't know how to fix my title heading I left out part of my model letters
 
Last edited:

tmarks11

Active User
Active Member
Joined
Aug 12, 2013
Messages
858
Likes
173
#2
The hum is due to the control power transformer, which is always on. It takes 220V and produces 110V (for control power to the switches) and 24V (for the halogen light).

Doesn't really hurt anything to leave it power, but it is annoying. Would be nice if the e-stop switch had a spare contact set that would switch it off.

rattle noise independent of spindle speed sounds like sheet metal vibrating. Check your back splash screws?
 

Martin22250

Iron
Registered Member
Joined
Jan 16, 2017
Messages
19
Likes
3
#3
The hum is due to the control power transformer, which is always on. It takes 220V and produces 110V (for control power to the switches) and 24V (for the halogen light).

Doesn't really hurt anything to leave it power, but it is annoying. Would be nice if the e-stop switch had a spare contact set that would switch it off.

rattle noise independent of spindle speed sounds like sheet metal vibrating. Check your back splash screws?
Thanks for your reply, I'll check it out
 

Bob Korves

H-M Supporter - Premium Member
H-M Supporter-Premium Member
Joined
Jul 2, 2014
Messages
4,032
Likes
4,183
#4
Might be a loose fan in the motor. Watch the belts run on the motor pulley and see if there is a problem with the belts jumping around or the pulley being loose.
 
[6]
5 [7]