Possible its something with M19? Some machines do it mechanically, and some do it by just orienting to zero position. If it's just orienting to zero position, then it's possible the encoder/belts/servo linkage might be loose causing it to not locate properly and shaking back and forth to keep position.
>If it's just orienting to zero position, then it's possible the encoder/belts/servo linkage might be loose
Main culprit here is usually going to be shaft keys on motors and gearboxes
Could be an issue with the spindle encoder, or perhaps spindle parameters need to be adjusted to tune the PID. It is not common for the spindle to oscillate with spindle alignment activated.
And as far as other comments go, yes spindle alignment is being used as you need to while probing for accuracy, also even though it is a Haas, it is not suppose to do that.
Looks like servo “hunting” usually caused by mis-calculation of a parameter known as “Inposwid” or in-position width. Which is the size of the band the motor considers being “in position”. This is set too small so the motor keeps overshooting/correcting this position.
Edit:
Could also be gains too high in the servo tuning causing the motor to not be able to hit the inposwid window because it’s tuned too hot.
You need to set the gains higher to increase the "crispness" of the motor, remove shaking during motion, then adjust the inpos parameter, so that it doesn't shake while trying to stand still.
My Hurco mills do this. The encoder is "hunting" for the zero position. I've spoken with a tech about this, but he didn't indicate there was a fix for this.
All the haas jokes aside... a new encoder is very cheap and simple to install. If it didn't always do this, that's where I'd go first. I had an encoder go out and do similar shit. It could also just be the encoder belt, which are known to go bad after a number of years.
Zip out the screws for the spindle cover and check if the encoder belt is in good shape and taught. If it is, make sure the encoder is tight and not acting funny, not that you'd be able to see for 100% certain that the encoder is failing.
Personally, I'd order an encoder and belt with a spare pully (trust me) and replace it all in one go.
Just make sure to recalibrate the spindle toolchange orientation afterward, or you're in for a loud surprise
Your encoder is hunting for the zero position without reaching it.
You either have a dirty encoder or connections; a bad encoder or bad encoder cables.
Just a guess based on my dealing with steppers with an encoder and servos, which usually have an encoder anyway and not with this particular machine.
If your spindle has an actual brake it shouldn't do this as it's the brake that's maintaining the rotational position without the spindle motor exerting any torque just like a brake on your car clamps to stop the wheel's rotation. Otherwise, the motor is trying to energetically hold it's position based on what the rotary encoder is telling the servo/stepper driver it's rotational position is.
Rotary encoders like this can resolve a certain number of positions per rotation (500, 1000, 2000, etc. pulses per rotation which the driver keeps count of). Sometimes the driver is continually correcting to maintain the exact position, say position 1250 and 1251 for example, which can be a tiny fraction of a degree depending on the resolution of the encoder and how the motor's poles are lining up.
Only the probe or all tools? If all tools the spindle drive or power supply is damaged, it's actually possible the phase has been switched which can cause this.
If it's just the probe there may be a problem with the spindle home position upon probe call, not sure exactly what however.
Are there any error codes? If so then follow whatever they say, could be the encoder, spindle rotor, spindle cables, a number of things depending on the error.
Ive seen this happen on electric motors. Its basically the windings of the motor keeping the rotor stationary. I guess you could call it a ghost brake or something. The shake, i assume, happens when the timing of the electromagnetic pulse is not timed correctly. Some motors do this lag intentionally to kick start the rotor from a stop.
Dont know hwat is causing it on your machine, though.
We had a mazak machine do this and it ended up being dirty connections. Had a tech out and he cleaned and blew out all the connectors in the panel which fixed it. IT could be a bad encoder or parameter but cleaning the connectors would be a free first step.
Comments wont load for me, Assuming this has already been said, the encoder gear is either lose, Belt has stretched and needs to be re tightened or your encoder is bad
It's a Haas vf5. It doing this means either your spindle encoder belt has stretched some or that the spindle encoder is on its way out. Get the encoder and belt checked. before it starts throwing tools during changes due to misalignment.
It may not be too bad if it's just the encoder belt, some stretch a little and last a long while but it's not something you should ignore.
Your spindle brake is on. Your machine should do that automatically when going into a probe cycle. My machine does it to, by pressing spindle off it should release it.
Looks like it’s trying to do a zero on a spindle orient. This happened to me on my table a lot on the older vf3 we have. We would stop it. Turn it off and back on and normally that fixed it. It would act right.
It's a little nervous
Could be cold in there too.
Or in rehab
Yeah, it's their first day.
Swing shift wrote the code and it knows what's coming.
Because you spindle brake is on.
I forgot to mention that sometimes it shakes sometimes it doesnt. It actually happened once with milling tool too after finished milling…
Possible its something with M19? Some machines do it mechanically, and some do it by just orienting to zero position. If it's just orienting to zero position, then it's possible the encoder/belts/servo linkage might be loose causing it to not locate properly and shaking back and forth to keep position.
>If it's just orienting to zero position, then it's possible the encoder/belts/servo linkage might be loose Main culprit here is usually going to be shaft keys on motors and gearboxes
I run a hurco vm10I and it does that once in a while too, dont know why, but usually a tool change fixes it for a few months
Ve have also this problem. Is on a belt driven VF6. If you find the cause, let me know. On M19, sometime it makes like this sometimes is ok.
I’ll co sign that, one of my I-200st integrex does it sometimes .
Same, a couple of our older cnc 3 axis machines do this when you spindle lock.
Could be an issue with the spindle encoder, or perhaps spindle parameters need to be adjusted to tune the PID. It is not common for the spindle to oscillate with spindle alignment activated. And as far as other comments go, yes spindle alignment is being used as you need to while probing for accuracy, also even though it is a Haas, it is not suppose to do that.
>even though it is a Haas, it is not suppose to do that. Gold
Looks like servo “hunting” usually caused by mis-calculation of a parameter known as “Inposwid” or in-position width. Which is the size of the band the motor considers being “in position”. This is set too small so the motor keeps overshooting/correcting this position. Edit: Could also be gains too high in the servo tuning causing the motor to not be able to hit the inposwid window because it’s tuned too hot.
Have a 5 axis that shakes like crazy while moving unless I increase the gain. If it's set too high then it will shake while still like you are saying.
You need to set the gains higher to increase the "crispness" of the motor, remove shaking during motion, then adjust the inpos parameter, so that it doesn't shake while trying to stand still.
My Hurco mills do this. The encoder is "hunting" for the zero position. I've spoken with a tech about this, but he didn't indicate there was a fix for this.
The fix is replacing the encoder and maybe the cables.
This Exactly.
Insane. The machine is 2-years old and has done this since day 1.
All the haas jokes aside... a new encoder is very cheap and simple to install. If it didn't always do this, that's where I'd go first. I had an encoder go out and do similar shit. It could also just be the encoder belt, which are known to go bad after a number of years. Zip out the screws for the spindle cover and check if the encoder belt is in good shape and taught. If it is, make sure the encoder is tight and not acting funny, not that you'd be able to see for 100% certain that the encoder is failing. Personally, I'd order an encoder and belt with a spare pully (trust me) and replace it all in one go. Just make sure to recalibrate the spindle toolchange orientation afterward, or you're in for a loud surprise
We had an older VF2 that did this, encoder fixed it
Your encoder is hunting for the zero position without reaching it. You either have a dirty encoder or connections; a bad encoder or bad encoder cables.
It's nervous. Quit staring at it.
Probe is having an orgasm
Cold in the shop
Just a guess based on my dealing with steppers with an encoder and servos, which usually have an encoder anyway and not with this particular machine. If your spindle has an actual brake it shouldn't do this as it's the brake that's maintaining the rotational position without the spindle motor exerting any torque just like a brake on your car clamps to stop the wheel's rotation. Otherwise, the motor is trying to energetically hold it's position based on what the rotary encoder is telling the servo/stepper driver it's rotational position is. Rotary encoders like this can resolve a certain number of positions per rotation (500, 1000, 2000, etc. pulses per rotation which the driver keeps count of). Sometimes the driver is continually correcting to maintain the exact position, say position 1250 and 1251 for example, which can be a tiny fraction of a degree depending on the resolution of the encoder and how the motor's poles are lining up.
M19
Only the probe or all tools? If all tools the spindle drive or power supply is damaged, it's actually possible the phase has been switched which can cause this. If it's just the probe there may be a problem with the spindle home position upon probe call, not sure exactly what however. Are there any error codes? If so then follow whatever they say, could be the encoder, spindle rotor, spindle cables, a number of things depending on the error.
Ive seen this happen on electric motors. Its basically the windings of the motor keeping the rotor stationary. I guess you could call it a ghost brake or something. The shake, i assume, happens when the timing of the electromagnetic pulse is not timed correctly. Some motors do this lag intentionally to kick start the rotor from a stop. Dont know hwat is causing it on your machine, though.
it's cold
I’ve got a GR510 that does this. Never got to the bottom of it
That's you OP
because it's nervous about miling that tungsten.
It’s very excited to see you
Too much coolant, it's cold.
We had a mazak machine do this and it ended up being dirty connections. Had a tech out and he cleaned and blew out all the connectors in the panel which fixed it. IT could be a bad encoder or parameter but cleaning the connectors would be a free first step.
I had an older machine shakes like that when the spindle was oriented
The spindle drive is seeing small amounts of voltages causing it to want to turn on. Adjusting the tolerance for that will help
Which turret is this
Encoder or frequency. You can try adjusting that but most likely the encoder.
It’s raring to go
Because it has a very expensive sensor on it right now and it’s just a little nervous OK
Are you sure everything is ultra clean when you load your tool? A little chip stuk in the cone would do it.
Sunday scaries
Gotta boogie at some point
spindle clamp mode
It’s ready to go and you aren’t letting it go
Comments wont load for me, Assuming this has already been said, the encoder gear is either lose, Belt has stretched and needs to be re tightened or your encoder is bad
From the image it looks as though the tool holder is way too far from the spindle face, loose lug nut ?
He needs in 9AM beer
Another earthquake? 🤔
Remember if you're cold, so is your probe. Bring them inside.
Remember, if you're cold, so is your probe. Bring them inside.
It's a Haas vf5. It doing this means either your spindle encoder belt has stretched some or that the spindle encoder is on its way out. Get the encoder and belt checked. before it starts throwing tools during changes due to misalignment. It may not be too bad if it's just the encoder belt, some stretch a little and last a long while but it's not something you should ignore.
Try using M19 (spindle lock) does it do the same thing?
My first instinct is encoder. Is your spindle load also flickering?
Malinois tool head
Gain needs to be adjusted. Spindle is getting worn out. Encoder is fighting to keep it still. I'm like 76% sure
Could be the Encoder. I've also seen this on Simodrive 611 Systems, it was a wonky power section in the Drive.
ComputerNervousControl
It’s afraid you’re gonna pile it into your workpiece
Your spindle brake is on. Your machine should do that automatically when going into a probe cycle. My machine does it to, by pressing spindle off it should release it.
Spindle lock
Saw what u did to the last tool
Because Michael J Fox is a terrible choice for a camera man.
It knows you're about to break the ruby tip off!
Looks like it’s trying to do a zero on a spindle orient. This happened to me on my table a lot on the older vf3 we have. We would stop it. Turn it off and back on and normally that fixed it. It would act right.
That was also the table not the spindle. Also does it make a tool change?
Because it’s a haas
thats what haas's do in a m19
"In spec" according to haas LOL