Critique my VFD plan
- greenbuggy
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27 Jan 2014 03:21 - 27 Jan 2014 03:22 #43215
by greenbuggy
Critique my VFD plan was created by greenbuggy
Backstory: 1979 Lagun FTV-3, baldor servos and encoders from a newer machine, currently running linuxcnc on a WTM intel Atom 1.8 mobo interfacing with the machine thru a Mesa 5i20 FPGA, 7i37TA opto board and 2x 7i29 motor drives.
The motor drives are piggybacked on P2 of the FPGA, the 7i37TA is on P3 and P4 is currently empty.
I recently got myself an Allen Bradley 1305 VFD w/HMI that will allow me to run the spindle motor on single phase 220. I'm still working on getting a brake unit for it so I can slow the spindle down quick, hoping to have that in a couple weeks.
I flipped thru the manual and it looks like the VFD can be controlled serially using an AB adapter I can get off ebay for <$50, but some digging didn't find anybody who had used such a control method here. Has anybody done something like that or is it a lost cause?
So, I need to get from the Mesa FPGA to a 0-10V analog output in order to run the VFD. Its looking like the 7i33TA at $79 is going to be the cheapest way to get this signal, unless I have a cheaper option. I'll also need a 50 pin cable to connect the two.
I'm concerned about putting the 7i33TA on P4, since the motion control stuff is already on P2 and I can't select sanity check for 7i33 on P4 in PnCConf, or does that not matter for a spindle control?
I don't have an easy way to mount a spindle encoder so I was thinking about doing something like this along the gear that drives the spindle: pico-systems.com/bridge_spindle.html I'm curious as to how the best way to electrically couple the hall effect sensors signals to the 5i20? Is there a way to use hall effect sensors to feed the encoder inputs on the 7i33?
The motor drives are piggybacked on P2 of the FPGA, the 7i37TA is on P3 and P4 is currently empty.
I recently got myself an Allen Bradley 1305 VFD w/HMI that will allow me to run the spindle motor on single phase 220. I'm still working on getting a brake unit for it so I can slow the spindle down quick, hoping to have that in a couple weeks.
I flipped thru the manual and it looks like the VFD can be controlled serially using an AB adapter I can get off ebay for <$50, but some digging didn't find anybody who had used such a control method here. Has anybody done something like that or is it a lost cause?
So, I need to get from the Mesa FPGA to a 0-10V analog output in order to run the VFD. Its looking like the 7i33TA at $79 is going to be the cheapest way to get this signal, unless I have a cheaper option. I'll also need a 50 pin cable to connect the two.
I'm concerned about putting the 7i33TA on P4, since the motion control stuff is already on P2 and I can't select sanity check for 7i33 on P4 in PnCConf, or does that not matter for a spindle control?
I don't have an easy way to mount a spindle encoder so I was thinking about doing something like this along the gear that drives the spindle: pico-systems.com/bridge_spindle.html I'm curious as to how the best way to electrically couple the hall effect sensors signals to the 5i20? Is there a way to use hall effect sensors to feed the encoder inputs on the 7i33?
Last edit: 27 Jan 2014 03:22 by greenbuggy.
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- PCW
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27 Jan 2014 07:14 #43218
by PCW
Replied by PCW on topic Critique my VFD plan
Instead of a 7I33 you might consider a single channel spindle interface like our SPINX1
this and a 50 pin breakout (like the 7I42TA) are probably the same price or cheaper than the 7I33 and more flexible (you would have 21 free TTL level I/O pins)
this and a 50 pin breakout (like the 7I42TA) are probably the same price or cheaper than the 7I33 and more flexible (you would have 21 free TTL level I/O pins)
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- cmorley
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27 Jan 2014 07:33 #43219
by cmorley
What information do you have on the 1305 - if I was looking for similar on ebay?
Do you have details on the serial control ?
I currently use a Mitsubishi freqrol inverter with a serial control. I needed atconverter from rs232 to rs485.
It works pretty well though I haven't finished the lathe conversion.
The sanity check is just a reminder to set the frequency properly for the 7i33.
It doesn't actually check anything
Chris M
Replied by cmorley on topic Critique my VFD plan
I recently got myself an Allen Bradley 1305 VFD w/HMI that will allow me to run the spindle motor on single phase 220. I'm still working on getting a brake unit for it so I can slow the spindle down quick, hoping to have that in a couple weeks.
I flipped thru the manual and it looks like the VFD can be controlled serially using an AB adapter I can get off ebay for <$50, but some digging didn't find anybody who had used such a control method here. Has anybody done something like that or is it a lost cause?
I'm concerned about putting the 7i33TA on P4, since the motion control stuff is already on P2 and I can't select sanity check for 7i33 on P4 in PnCConf, or does that not matter for a spindle control?
What information do you have on the 1305 - if I was looking for similar on ebay?
Do you have details on the serial control ?
I currently use a Mitsubishi freqrol inverter with a serial control. I needed atconverter from rs232 to rs485.
It works pretty well though I haven't finished the lathe conversion.
The sanity check is just a reminder to set the frequency properly for the 7i33.
It doesn't actually check anything
Chris M
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- greenbuggy
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27 Jan 2014 13:07 #43229
by greenbuggy
www.ab.com/support/abdrives/1305/
literature.rockwellautomation.com/idc/gr...1305-um002_-en-p.pdf
literature.rockwellautomation.com/idc/gr...1305-um002_-en-p.pdf
Serial control is all listed in appendix B. It appears that I would also need an Allen Bradley 1203-sss to get from the DB9 serial port on my atom board to the round interface connector on the side of my drive.
Replied by greenbuggy on topic Critique my VFD plan
I recently got myself an Allen Bradley 1305 VFD w/HMI that will allow me to run the spindle motor on single phase 220. I'm still working on getting a brake unit for it so I can slow the spindle down quick, hoping to have that in a couple weeks.
I flipped thru the manual and it looks like the VFD can be controlled serially using an AB adapter I can get off ebay for <$50, but some digging didn't find anybody who had used such a control method here. Has anybody done something like that or is it a lost cause?
I'm concerned about putting the 7i33TA on P4, since the motion control stuff is already on P2 and I can't select sanity check for 7i33 on P4 in PnCConf, or does that not matter for a spindle control?
What information do you have on the 1305 - if I was looking for similar on ebay?
www.ab.com/support/abdrives/1305/
literature.rockwellautomation.com/idc/gr...1305-um002_-en-p.pdf
Do you have details on the serial control ?
literature.rockwellautomation.com/idc/gr...1305-um002_-en-p.pdf
Serial control is all listed in appendix B. It appears that I would also need an Allen Bradley 1203-sss to get from the DB9 serial port on my atom board to the round interface connector on the side of my drive.
I currently use a Mitsubishi freqrol inverter with a serial control. I needed atconverter from rs232 to rs485.
It works pretty well though I haven't finished the lathe conversion.
The sanity check is just a reminder to set the frequency properly for the 7i33.
It doesn't actually check anything
Chris M
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- greenbuggy
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29 Jan 2014 08:25 #43283
by greenbuggy
I ordered a SPINX1 today, hope to see it later this week.
Is there any reason I couldn't use the 7i37TA I already have to drive the SPINX1 inputs or do the optoisolators interfere with using it for PWM?
Replied by greenbuggy on topic Critique my VFD plan
Instead of a 7I33 you might consider a single channel spindle interface like our SPINX1
this and a 50 pin breakout (like the 7I42TA) are probably the same price or cheaper than the 7I33 and more flexible (you would have 21 free TTL level I/O pins)
I ordered a SPINX1 today, hope to see it later this week.
Is there any reason I couldn't use the 7i37TA I already have to drive the SPINX1 inputs or do the optoisolators interfere with using it for PWM?
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