Need Help!- J325 Spindle motor removal

[lavrgs]

The simple answer is it takes two people ...but I want to see if I can take the spindle motor out now...Are there any clever ways to hoist it out? I don't have a gantry but I do have a come-along...just thought I'd ask...

[Al_The_Man]

If there is a horizontal beam or something above to attach a simple block and tackle to, may be the cheapest/simplest way.
Might even be possible single handed this way in a pinch?
An old sailors way is a barrel hitch around the motor!
Al.

[underthetire]

I've done the rope and grab by myself. Not that big of motor.

[lavrgs]

Hmmm barrel hitch I can see the why yur called the man...
I'll give it a go!!!

I used two ladders and a board then a large ratchet from a tie down to get it up part way. I just need to close the over head door to get an extra foot and viola...

[lavrgs]

I got the motor out and got the back off to see the encoder and what I found doesn't look like what I expected...my rough count shows that it probably has 128 teeth so it will not work with my spindle drive -
Is my best option to try and get an encoder or possibly buy a different motor?

Can anyone tell me what this is? encoder, resolver or ?

[Al_The_Man]

It is the same method used on Mitsubishi/Mazak spindles, it is a toothed wheel with two hall effect sensors with 90° (quadrature) detection.
You could remove it and put a through-hole encoder from Renco or Toyo.
You should not have to buy another motor.
Al.

[MadPickinSkills]

Originally Posted by lavrgs I got the motor out and got the back off to see the encoder and what I found doesn't look like what I expected...my rough count shows that it probably has 128 teeth so it will not work with my spindle drive - Is my best option to try and get an encoder or possibly buy a different motor? Can anyone tell me what this is? encoder, resolver or ?

lavrgs, about how much space did you need above the machine to get it out? I'm going to have my spindle rebuilt in about a month and mine is in the garage so I'm worried about not having enough room above the machine to pull it out.

thanks

[lavrgs]

The motor is just short of two feet long . I used two ladders and a 2x4 to support the motor. I used a very heavy duty tie down ratchet and another tie down with 2 hooks put into the slots on the side of the mounting plate. I put the strap from the hooked tie down into the ratchet slot and was able to get the motor out far enough to lay it on its side so I could remove the back cover. I have a 10 foot ceiling so it wasn't too bad. Getting it to the ground would be a chore... If you had a cherry picker with a long enough boom you may be able to get it down but its a heavy beast 80-100++lbs I'd guess. Another option may be using the ladders and two people, it may be possible to swing the motor supported on one ladder so that two people could use the support and lower it down.

[lavrgs]

Closing the loop/ on the spindle motor/Encoder update...I bought an encoder from Rotary Encoders By Encoder Products Company a model 260-N-T-02-H-1024-Q-HV-1-S/6-2-N...WHEW!!! OK so when wired "correctly" the motor spins backward (CCW), as a point of reference when in open loop the motor spins CW. Since I am not very knowledgeable about encoders my question is can it be wired to run the other way? I believe the motor could run in either direction and its possible that there is a parameter than could be switched BUT when changing back to open loop it runs in the CW direction...
I'm a bit confused and frustrated because I thought this should be plug and play not plug and pray... Closing the loop on this motor has been a friggin' chore and its still not done.

What I need is someone to call that can explain the errors in my ways - can someone recommend someone in the Pacific NW? I'll try the folks I bought it from but they weren't exactly on top of it when I bought the device...

Thanks

[Al_The_Man]

To reverse the encoder phasing you need to reverse the A & /A connections if differential type.
If it is a single ended type, i.e. A & B only, then change A & B.
Al.

[lavrgs]

Al you must excuse my lack of knowledge So here is what I have;not including the 5VDC and COM and it is running CCW
1-A
2-A'
3-B
4-B'
Please rearrange the items for CW rotation
Here's what I have tried without much luck...
1A'
2A
3B'
4B
Didn't seem the change direction
1B
2B"
3A
4A'
became unstable

[Al_The_Man]

If you change both the A pulses and both the B at the same time you end up with the same thing.
You have to change only one or the other.
In the first list you show, it would be swap 1 & 2.
Al.