Wow, this is amazing! the ability to engrave/mill is really getting me excited about a potential conversion for my lathe. Did you ever get the clutch and do you have a video about it?
could a guy just use a servo to drive the spindle and not use a clutch to switch back and forth from the servo to the AC motor? I'm guessing the problem is that you would need a large servo and it's cheaper to use a clutch and switch back and forth? I'm getting ready to start a CNC lathe build so I'm doing my homework. thanks, you soooo much for documenting so much of your building. I'm in the process of watching all your content.
Sure, one Servo is industrial std. ,but direct driven it should be for my lathe at least 3.5 kw for low end torque. So for me it was cheaper to leave the gearbox in, use only a 1.5kw servo and a small servo to drive the spindle directly without the lash from the gearbox.
@@TheSuntravel cool that makes sense. A 3.5kw servo is very costly. I don't think I can afford one of those either. haha. Do you switch modes in the software using a relay or do you manually switch.
@@BecksArmory manually? It is a CNC :) You simply select CAxisEnable for one output in the Wizard and after that it will switch the servo or clutch by M51 and off by M50. It also sets C0 on the index from spindle encoder. I also have a button on the VCP "C-Axis on/off"
@@TheSuntravel sweet! I think I'm going to start out with a vfd controlled AC motor paired with an encoder for the spindle. I can cut threads with that spindle setup, correct? As I get more familiar with centroid and lathe programming, I'll consider upgrades. I'm a mechanical machine designer as a day job so that part doesn't scare me. The controls and electrical side... that's a lot more intimidating to me if I'm honest.
@@BecksArmory Wiring is easy with Centroid, they have easy to follow schematics for almost any case. Follow them and like magic it will work, even if you have like me no clue why 🤣🤣
Sehr cool Ich bin ähnlich weit gekommen. Habe letzten Monat ein Wechsler Macro zusammen gebastelt welches mit einem Servo oder Closed Loop Stepper funktioniert. Dabei bin Ich über die Funktion gestolpert das man den Encoder Sichtbar machen kann. Benutz doch den zum messen der Präzision anstelle der Uhr ist 100 mal genauer. Bei mir lässt sich die Hauptspindel blockieren daher konnte Ich auch schon erste Experimente mit dem Nuten stossen machen. Hat mit dem Encoder und G71 prima geklappt.(Habe alle 15 Grad eine Nut gestossen ) Ich habe auch schon ein M19 Macro zusammen gebastelt welches aber nur mit einem extra Externen Näherungsschalter arbeitet. Kannst du mir vielleicht sagen welcher Eingang das Z Signal des Encoders hat? Damit könnte man die C Achse direkt Indexieren am Encoder. Vielleicht wäre das eine gute Kombie in deinem Macro zur Magnetkupplung? zB M19 M26/C und dein Ausgang oder Ausgäne eben dazu.... Dann wäre die Achse direkt auf 0 gesetzt Bin gespannt wie deine Magnetkupplung arbeitet. Danke wie immer für deine Videos sind sehr inspirierend für mich. Gruss Stephan
Moin Stephan, #5043 current position C #23405 index zero pulse from spindle encoder Passende macros hab ich schon geschrieben und auch die PLC umgeschrieben um Sicherheitsfunktionen und passende Fehlermeldungen zu bekommen. Gruß Uwe
@@jonathonwood4088 the spindle servo drives the spindle with a 6 speed gearbox, the backlash in the gearbox makes the position mode of the servo useless for C-Axis. That would only be ok if the servo drives the spindle direct without any backlash and it would need a bigger servo for good torque at slow milling speeds.
@@TheSuntravel I'm thinking of replacing my 600w spindle motor with a servo, how's the JMC doing so far are you happy with it ? Also where did you buy it, do they sell directly or through Aliexpress store ? Thanks
Fantastic! Look forward to seeing it with the mag clutch fitted.
Wow, this is amazing! the ability to engrave/mill is really getting me excited about a potential conversion for my lathe. Did you ever get the clutch and do you have a video about it?
there is a build thread in the centroid forum
could a guy just use a servo to drive the spindle and not use a clutch to switch back and forth from the servo to the AC motor? I'm guessing the problem is that you would need a large servo and it's cheaper to use a clutch and switch back and forth? I'm getting ready to start a CNC lathe build so I'm doing my homework. thanks, you soooo much for documenting so much of your building. I'm in the process of watching all your content.
Sure, one Servo is industrial std. ,but direct driven it should be for my lathe at least 3.5 kw for low end torque.
So for me it was cheaper to leave the gearbox in, use only a 1.5kw servo and a small servo to drive the spindle directly without the lash from the gearbox.
@@TheSuntravel cool that makes sense. A 3.5kw servo is very costly. I don't think I can afford one of those either. haha. Do you switch modes in the software using a relay or do you manually switch.
@@BecksArmory manually? It is a CNC :) You simply select CAxisEnable for one output in the Wizard and after that it will switch the servo or clutch by M51 and off by M50. It also sets C0 on the index from spindle encoder. I also have a button on the VCP "C-Axis on/off"
@@TheSuntravel sweet! I think I'm going to start out with a vfd controlled AC motor paired with an encoder for the spindle. I can cut threads with that spindle setup, correct? As I get more familiar with centroid and lathe programming, I'll consider upgrades. I'm a mechanical machine designer as a day job so that part doesn't scare me. The controls and electrical side... that's a lot more intimidating to me if I'm honest.
@@BecksArmory Wiring is easy with Centroid, they have easy to follow schematics for almost any case. Follow them and like magic it will work, even if you have like me no clue why 🤣🤣
Amazing ! Very good job 👏👏👏
Sehr cool
Ich bin ähnlich weit gekommen.
Habe letzten Monat ein Wechsler Macro zusammen gebastelt welches mit einem Servo oder Closed Loop Stepper funktioniert.
Dabei bin Ich über die Funktion gestolpert das man den Encoder Sichtbar machen kann.
Benutz doch den zum messen der Präzision anstelle der Uhr ist 100 mal genauer.
Bei mir lässt sich die Hauptspindel blockieren daher konnte Ich auch schon erste Experimente mit dem Nuten stossen machen.
Hat mit dem Encoder und G71 prima geklappt.(Habe alle 15 Grad eine Nut gestossen )
Ich habe auch schon ein M19 Macro zusammen gebastelt welches aber nur mit einem extra Externen Näherungsschalter arbeitet.
Kannst du mir vielleicht sagen welcher Eingang das Z Signal des Encoders hat?
Damit könnte man die C Achse direkt Indexieren am Encoder.
Vielleicht wäre das eine gute Kombie in deinem Macro zur Magnetkupplung? zB M19 M26/C und dein Ausgang oder Ausgäne eben dazu....
Dann wäre die Achse direkt auf 0 gesetzt
Bin gespannt wie deine Magnetkupplung arbeitet.
Danke wie immer für deine Videos sind sehr inspirierend für mich.
Gruss Stephan
Moin Stephan,
#5043 current position C
#23405 index zero pulse from spindle encoder
Passende macros hab ich schon geschrieben und auch die PLC umgeschrieben um Sicherheitsfunktionen und passende Fehlermeldungen zu bekommen.
Gruß
Uwe
Hai...whats controller do you use
Centroid Acorn
Also, what are you using for your spindle motor?
1.5kw JMC Servo
@@TheSuntravel were you unable to use it for positioning too? Like did you have to set it up as a spindle only?
@@jonathonwood4088 the spindle servo drives the spindle with a 6 speed gearbox, the backlash in the gearbox makes the position mode of the servo useless for C-Axis. That would only be ok if the servo drives the spindle direct without any backlash and it would need a bigger servo for good torque at slow milling speeds.
@@TheSuntravel I'm thinking of replacing my 600w spindle motor with a servo, how's the JMC doing so far are you happy with it ? Also where did you buy it, do they sell directly or through Aliexpress store ? Thanks
What servo motor did you use?
400W JMC AC Servo for Z, 4Nm CL Stepper on C and X