First LinuxCNC project, trying to explore componen
13 May 2015 03:21 #58611
by Jake
First LinuxCNC project, trying to explore componen was created by Jake
Howdy Guys!
I have been wanting to expand my machine capabilities badly.
I want to build a CNC plasma table first. Ground up no parts on hand at all.
I have thoughts of Allen Bradley Ultra 3000I AC servo drives, with AC servo motors.
It is the hardware interface from there that I still do not understand.
One of my thoughts is
pico-systems.com/osc2.5/catalog/product_...ath=3&products_id=19
This card from PICO PWM controller, Is it as simple as parallel from PC to this card, wire to servo drives, wire to motors/encoders?
I have also thought about getting a beaglebone black and some of the TI DRV8301 boosterpacks, and 10amp BLDC servos to play with things.
www.ti.com/tool/BOOSTXL-DRV8301 I do have a couple of these on a F28069M launchpad and they are slick especially with the TI software to go with them.
I have been thinking about gathering some parts in hope of putting things together in 7 weeks after the summer semester is over....
I have been wanting to expand my machine capabilities badly.
I want to build a CNC plasma table first. Ground up no parts on hand at all.
I have thoughts of Allen Bradley Ultra 3000I AC servo drives, with AC servo motors.
It is the hardware interface from there that I still do not understand.
One of my thoughts is
pico-systems.com/osc2.5/catalog/product_...ath=3&products_id=19
This card from PICO PWM controller, Is it as simple as parallel from PC to this card, wire to servo drives, wire to motors/encoders?
I have also thought about getting a beaglebone black and some of the TI DRV8301 boosterpacks, and 10amp BLDC servos to play with things.
www.ti.com/tool/BOOSTXL-DRV8301 I do have a couple of these on a F28069M launchpad and they are slick especially with the TI software to go with them.
I have been thinking about gathering some parts in hope of putting things together in 7 weeks after the summer semester is over....
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13 May 2015 17:07 #58623
by andypugh
I don't think so, though Jon can give a more definitive answer than me.
I believe that the board linked above is designed to drive the Pico PWM servo amplifiers. The AB drives probably require an analogue voltage, so the Pico PPMC boards would be a better fit.
Replied by andypugh on topic First LinuxCNC project, trying to explore componen
One of my thoughts is
pico-systems.com/osc2.5/catalog/product_...ath=3&products_id=19
This card from PICO PWM controller, Is it as simple as parallel from PC to this card, wire to servo drives, wire to motors/encoders? .
I don't think so, though Jon can give a more definitive answer than me.
I believe that the board linked above is designed to drive the Pico PWM servo amplifiers. The AB drives probably require an analogue voltage, so the Pico PPMC boards would be a better fit.
The following user(s) said Thank You: Jake
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13 May 2015 19:26 #58633
by Jake
Replied by Jake on topic First LinuxCNC project, trying to explore componen
Thanks Andy!
I want to get rolling on something, luckily the AB Ultra 3000 are plentiful and can be had for a good price. After finding the design guide for them, they have an analog input model that I think would be the simplest, not having to deal with devicenet or there other interface....
Figuring out the hardware seems like the largest challenge at the moment. I want to use AC servos. I want to build a plasma table first, its just picking what cards and interfaces.
I think since its a ground up it makes it somewhat easier, AC servos with encoders the enventually to the PC. It looks like MESA has AC servo cards that can handle up to 2kW only $200~, then I think I just need a quadrature counter card, a GPIO, a card to interface everything then to the PC.
I may just get a beagleboard, and a few more of the DRV8301 and run a couple of 10A BLDC servos.
I want to get rolling on something, luckily the AB Ultra 3000 are plentiful and can be had for a good price. After finding the design guide for them, they have an analog input model that I think would be the simplest, not having to deal with devicenet or there other interface....
Figuring out the hardware seems like the largest challenge at the moment. I want to use AC servos. I want to build a plasma table first, its just picking what cards and interfaces.
I think since its a ground up it makes it somewhat easier, AC servos with encoders the enventually to the PC. It looks like MESA has AC servo cards that can handle up to 2kW only $200~, then I think I just need a quadrature counter card, a GPIO, a card to interface everything then to the PC.
I may just get a beagleboard, and a few more of the DRV8301 and run a couple of 10A BLDC servos.
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13 May 2015 19:32 #58634
by andypugh
Just be aware that LiuxCNC + Beagleboard isn't supported by mainline LinuxCNC, so anything BB specific would need to be directed to groups.google.com/forum/#!forum/machinekit
Replied by andypugh on topic First LinuxCNC project, trying to explore componen
I may just get a beagleboard, and a few more of the DRV8301 and run a couple of 10A BLDC servos.
Just be aware that LiuxCNC + Beagleboard isn't supported by mainline LinuxCNC, so anything BB specific would need to be directed to groups.google.com/forum/#!forum/machinekit
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13 May 2015 19:33 #58635
by Jake
Replied by Jake on topic First LinuxCNC project, trying to explore componen
OK thanks for the heads up there. I want to go right to the mainline LCNC so that would be a waste of time and money then.
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13 May 2015 21:28 - 13 May 2015 21:31 #58638
by jmelson
For controlling analog-input servo amps, we do have the PPMC, which has plug-in boards for the various functions. So, there is a DAC to give analog outputs, an encoder counter, and a digital I/O board.
See pico-systems.com/osc2.5/catalog/index.php?cPath=1 for info on that product.
Jon
Jon
Replied by jmelson on topic First LinuxCNC project, trying to explore componen
Mostly, but you need a servo drive that accepts digital PWM commands. That is how our PWM servo amps work. Many other general-purpose servo amps expect an analog voltage to control them. It is usually an analog voltage between -10 V and +10 V, and represents either commanded velocity or commanded torque. We do have servo amps for brushless motors.Howdy Guys!
I have been wanting to expand my machine capabilities badly.
I want to build a CNC plasma table first. Ground up no parts on hand at all.
I have thoughts of Allen Bradley Ultra 3000I AC servo drives, with AC servo motors.
It is the hardware interface from there that I still do not understand.
One of my thoughts is
pico-systems.com/osc2.5/catalog/product_...ath=3&products_id=19
This card from PICO PWM controller, Is it as simple as parallel from PC to this card, wire to servo drives, wire to motors/encoders?
For controlling analog-input servo amps, we do have the PPMC, which has plug-in boards for the various functions. So, there is a DAC to give analog outputs, an encoder counter, and a digital I/O board.
See pico-systems.com/osc2.5/catalog/index.php?cPath=1 for info on that product.
Jon
Jon
Last edit: 13 May 2015 21:31 by jmelson.
The following user(s) said Thank You: Jake
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13 May 2015 21:59 #58639
by Jake
Thanks Jon,
Soooo
It looks like your 20amp servo drives are the same price that I could get the AB U3K for.
If I bought two of the servo drives,
I would need
Heat sink
one of the universal pwm controllers
the power switch braking module
enough SSR's to handle the extras
power supply
Servos, limits, cabling....
Am I missing anything?
I want to build the plasma cutter first. I am still on the hunt for a mill for a conversion or retrofit. I almost had a Mori VMC but I hesitated to long and it went to the scrapper. I may still convert my Lagun mill as the VMC would be a huge step.
Replied by Jake on topic First LinuxCNC project, trying to explore componen
Mostly, but you need a servo drive that accepts digital PWM commands. That is how our PWM servo amps work. Many other general-purpose servo amps expect an analog voltage to control them. It is usually an analog voltage between -10 V and +10 V, and represents either commanded velocity or commanded torque. We do have servo amps for brushless motors.Howdy Guys!
I have been wanting to expand my machine capabilities badly.
I want to build a CNC plasma table first. Ground up no parts on hand at all.
I have thoughts of Allen Bradley Ultra 3000I AC servo drives, with AC servo motors.
It is the hardware interface from there that I still do not understand.
One of my thoughts is
pico-systems.com/osc2.5/catalog/product_...ath=3&products_id=19
This card from PICO PWM controller, Is it as simple as parallel from PC to this card, wire to servo drives, wire to motors/encoders?
For controlling analog-input servo amps, we do have the PPMC, which has plug-in boards for the various functions. So, there is a DAC to give analog outputs, an encoder counter, and a digital I/O board.
See pico-systems.com/osc2.5/catalog/index.php?cPath=1 for info on that product.
Jon
Jon
Thanks Jon,
Soooo
It looks like your 20amp servo drives are the same price that I could get the AB U3K for.
If I bought two of the servo drives,
I would need
Heat sink
one of the universal pwm controllers
the power switch braking module
enough SSR's to handle the extras
power supply
Servos, limits, cabling....
Am I missing anything?
I want to build the plasma cutter first. I am still on the hunt for a mill for a conversion or retrofit. I almost had a Mori VMC but I hesitated to long and it went to the scrapper. I may still convert my Lagun mill as the VMC would be a huge step.
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14 May 2015 08:37 #58660
by jmelson
Replied by jmelson on topic First LinuxCNC project, trying to explore componen
Sounds like the right parts list. Too bad on the Mori! Retrofitting an old CNC mill is a lot easier than converting a manual mill - don't ask how I know that!Howdy Guys!
It looks like your 20amp servo drives are the same price that I could get the AB U3K for.
If I bought two of the servo drives,
I would need
Heat sink
one of the universal pwm controllers
the power switch braking module
enough SSR's to handle the extras
power supply
Servos, limits, cabling....
Am I missing anything?
I want to build the plasma cutter first. I am still on the hunt for a mill for a conversion or retrofit. I almost had a Mori VMC but I hesitated to long and it went to the scrapper. I may still convert my Lagun mill as the VMC would be a huge step.
Jon
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14 May 2015 18:01 #58671
by Jake
Oh I know! just not having to deal with the ball screw install and getting servos mounted is a pain in itself! There have been some older CNC mills pop up on craigslist periodically, but I am hoping to find a VMC with a tool changer instead of just a knee or bed mill. Thanks for the help on the parts list! I am still temped to find a low cost setup just to be able to start exploring the workings of the system.
Replied by Jake on topic First LinuxCNC project, trying to explore componen
Sounds like the right parts list. Too bad on the Mori! Retrofitting an old CNC mill is a lot easier than converting a manual mill - don't ask how I know that!
Jon
Oh I know! just not having to deal with the ball screw install and getting servos mounted is a pain in itself! There have been some older CNC mills pop up on craigslist periodically, but I am hoping to find a VMC with a tool changer instead of just a knee or bed mill. Thanks for the help on the parts list! I am still temped to find a low cost setup just to be able to start exploring the workings of the system.
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14 May 2015 20:34 #58688
by Jake
Replied by Jake on topic First LinuxCNC project, trying to explore componen
Well I got some pico systems parts on the way. Good ole eBay. $350 for three servo cards the analog interface, spindle DAC, and brake module...... Now to find some brushed motors and power supply.
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