2 speed spindles
02 Aug 2022 23:33 #248881
by Jake
2 speed spindles was created by Jake
I do not want to muck up Tommys thread on his BMC retrofit.....
Up till now I really have never run my machine less than 500rpm unless it was something real light and quick. There is possibly a project coming in that will require low rpm and time. My Hurco BMC30 has the Yaskawa spindle drive with that has a low and high range that is changed by changing the winding configuration.
I found "gearchange" in the manual and have found some other ways that people have done the multispeed spindles and or gear boxes. I have not run across one like this one that changes the winding configuration.
There is an output to drive the contactor coil, and there is a input to confirm it is in low. There is no change in speed feedback as that comes off the spindle motor shaft encoder. I am going to fall on the safe side and say the spindle must not be energized during the changing from low to high and back. I can live with the couple extra seconds there.
I have thought of a M3 remap possibly ( what is below is a rough idea)
If S3<500 RPM
low range output = true
low range input = true
if S3 > 500 RPM
low range output = false
low range input = false
Or just using gearchange which I need to look more into.
Thanks everyone!
Up till now I really have never run my machine less than 500rpm unless it was something real light and quick. There is possibly a project coming in that will require low rpm and time. My Hurco BMC30 has the Yaskawa spindle drive with that has a low and high range that is changed by changing the winding configuration.
I found "gearchange" in the manual and have found some other ways that people have done the multispeed spindles and or gear boxes. I have not run across one like this one that changes the winding configuration.
There is an output to drive the contactor coil, and there is a input to confirm it is in low. There is no change in speed feedback as that comes off the spindle motor shaft encoder. I am going to fall on the safe side and say the spindle must not be energized during the changing from low to high and back. I can live with the couple extra seconds there.
I have thought of a M3 remap possibly ( what is below is a rough idea)
If S3<500 RPM
low range output = true
low range input = true
if S3 > 500 RPM
low range output = false
low range input = false
Or just using gearchange which I need to look more into.
Thanks everyone!
The following user(s) said Thank You: tommylight
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02 Aug 2022 23:41 #248883
by andypugh
Replied by andypugh on topic 2 speed spindles
I have a "gearchoice" component that energises one of two clutches in my lathe gearbox (and, also, a brake)
This is the old and simple version, the new version does on-the-fly shifts during rapids (but not feeds) but you probably don't want that.
Are you running from real three-phase or from a VFD?
This is the old and simple version, the new version does on-the-fly shifts during rapids (but not feeds) but you probably don't want that.
Are you running from real three-phase or from a VFD?
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08 Aug 2022 20:38 #249371
by Jake
Replied by Jake on topic 2 speed spindles
I am running real three phase well kinda (Phase Perfect solid state phase converter). Having real 3phase here is retarded unless you are a dedicated shop running all the time.
My spindle drive has the contactor on the motor side to change the winding configuration. I just need to tell the spindle drive to close the contact when M3 < 500 RPM and confirm that it is closed.
There is an input on the spindle drive which will energize the contactor coil, and there is a switch on the contactor to confirm that the contactor has closed. I have my control wired up and ready for it. I just need to decide which way to attack this, I rarely ever needed to run below 500RPM so it was always a back burner issue.
I had also thought about a M3 remap. I do not know if this machine did it on the fly in the past, I am going to go conservative on this and say that the spindle should not be energized during the winding change.
I will go check out "gearchoice"
Thanks Andy!
My spindle drive has the contactor on the motor side to change the winding configuration. I just need to tell the spindle drive to close the contact when M3 < 500 RPM and confirm that it is closed.
There is an input on the spindle drive which will energize the contactor coil, and there is a switch on the contactor to confirm that the contactor has closed. I have my control wired up and ready for it. I just need to decide which way to attack this, I rarely ever needed to run below 500RPM so it was always a back burner issue.
I had also thought about a M3 remap. I do not know if this machine did it on the fly in the past, I am going to go conservative on this and say that the spindle should not be energized during the winding change.
I will go check out "gearchoice"
Thanks Andy!
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