Spindle motor replacement
My cnc spindle motor makes a blue light that i think are sparks when i am machining, should i replace the motor ? The motor that is on it is the original old motor.
Fyi-My machine is a labvolt 5600.
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Last edited by KyleWarren; 01-30-2018 at 01:08 PM.
Re: Spindle motor replacement
i removed the spindle motor and when i ran it i saw a lot of sparks on the brushes, i would like to replace the motor with a brushless motor do you have any recommendations for what motor to use? what are the specifications for a motor that would work?
Re: Spindle motor replacement
According to their website, it's a 1HP motor? Without knowing the size of it, It's hard to say what will fit. Maybe an 800w spindle like this?
https://www.ebay.com/itm/800W-220V-E...EAAOSw2s1UtyXj
Gerry
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Re: Spindle motor replacement
the motor needs to be offset to the back because it is an r8 collet system
Re: Spindle motor replacement
Can you post a picture of the motor? Maybe the data plate. Any idea what the frame size is? According to the web site it's a 1 HP, ~3400 RPM motor. Pretty much sounds like a NEMA 56 frame. But could be metric or a special.
Jim Dawson
Sandy, Oregon, USA
Re: Spindle motor replacement
I will post a picture of the motor tonight when I get home. I am not sure about the mounting holes, but i think making an adapter plate to have to motor attach shouldn't be to hard, I also have to figure out and source the pulley for the motor.
Re: Spindle motor replacement
what i was originally thinking is that i would buy a motor and driver from a place like hobbyking and then build an adapter plate to mount it to the machine, i just don't know what motor and driver would work.
Re: Spindle motor replacement
You should concider buying a motor that is in the same RPM, torque range (or a bit more), and general style to maintain the performance characteristics of your machine. I don't think a RC model type BLDC motor would be what you want, they are normally high RPM motors. Based on the published specs, a 1KW servo motor would be in the range of what you are looking for. Or use a inverter duty motor and a sensorless vector VFD.
Jim Dawson
Sandy, Oregon, USA
Re: Spindle motor replacement
There are also Fanuc yellow cap DC servo's you could utilize as a spindle.
If going that route it will pay to check out the status of the brushes and if it need any internal cleaning.
In good shape, these are nice motors.
Also Treadmill DC motors
What is the nature of the present drive?
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.
Re: Spindle motor replacement
What do you mean the nature of my present drive? And i would like a relatively inexpensive spindle solution.
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Re: Spindle motor replacement
How is the present drive controlled? What kind of signal? 0-10v etc. What is the voltage of the DC motor?
If you can keep the present drive, the ex- T.M. motor might be a low $$ answer.
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.
Re: Spindle motor replacement
I have a motor controller that i controller with a 5 k ohm potentiometer
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Re: Spindle motor replacement
And the motor that was on there is 90v dc.
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Re: Spindle motor replacement
What make controller and voltage of motor?
90v so a T.M. motor should fit the bill.
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.
Re: Spindle motor replacement
Those are the pictures of the bad spindle motor.
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Re: Spindle motor replacement
Automation technologies sells two milling spindle motors - a 1kw and a 2.2kw which come with a controller / speed control.
Tormach sells the motors separately for both their 770 (1hp) and the 1100 (1.5hp). They also sell them as complete heads.
little machine shop sells a variety of small milling motors as well as complete mini milling heads
Re: Spindle motor replacement
I removed the spindle
One problem that might happen with a new spindle and vfd is that the normal spindle is 8 inchs from the z axis, does anyone know a good way to offset it?
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Re: Spindle motor replacement
The DC T.M. motors I have used such as the Johnson, are 4.2" in O.A. dia.
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.
Re: Spindle motor replacement
The more I read through this thread the more confused I get, but I'm old so maybe I just confuse easily.
I understand you want to replace your spindle motor. Are you wanting to speed up the spindle also? The spindle specs from the website indicated that the original motor is a ~3400 RPM motor. Are you now suggesting that you want to go with a router spindle that will turn in the 24,000 RPM range? That would give you a minimum speed of about 6000 RPM.
As far as spacing a router spindle out 8 inches, a large aluminum block would be my choice.
Jim Dawson
Sandy, Oregon, USA
Re: Spindle motor replacement
I am trying to figure out the best way to get my mill up and running again, i am considering all of the ways of doing so then i will do what ever is best. Right know i think the best way is to just figure out what replacement brushed dc motor would work for the rpm and mounting.
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