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Author Topic: Bridgeport Knee Mill Conversion?  (Read 158995 times)

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Offline Hood

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Re: Bridgeport Knee Mill Conversion?
« Reply #90 on: May 17, 2016, 07:53:22 AM »
oops in the above pdf I do not have a feed showing for the 10amp fuse at the top middle, that gets fed from L1.

Hood

Offline Davek0974

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Re: Bridgeport Knee Mill Conversion?
« Reply #91 on: May 17, 2016, 08:25:42 AM »
Nice, do you feel it was needed to have 24v supply for the CSMIO separate from the 24v controls or is it just "good practice"??
Bridgeport Mill, Mach3 V062, CSMIO-IP/A controller, AC Servo Drives

Offline Hood

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Re: Bridgeport Knee Mill Conversion?
« Reply #92 on: May 17, 2016, 09:43:31 AM »
I think it is required that you feed the actual CSMIO from one supply and the I/O from another if you want to keep the opto isolation, could be wrong though but I am sure I read that in the manual.

On the Chiron I have a big 3 phase supply but it has 2 output channels that are not connected so I used that. On the plasma I got a couple of power supplies, one just for CSMIO, Enc and MPG modules  power side  and a bigger one for all the rest of the 24v (limits, MiniTHC, servo drives logic etc)

I got the ones on the plasma from Eastern Transformers, bought a few of each 100w and 10w as the price was good and I like to have spares.
Looks like I bought the last of them as they only have 5w ones left.
http://www.ete.co.uk/pss-ip20-miniature-series-5w-to-300w--93.html

Hood

Offline Davek0974

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Re: Bridgeport Knee Mill Conversion?
« Reply #93 on: May 17, 2016, 10:05:42 AM »
Yeah its a bit vague - seems you can do both, they say one PSU is fine if there are no big contactors etc. I will get a couple of small pus's probably, I did have a nice PLC quality one here but overkill if it cant do all the job so two smaller ones will be better.

Now, lets complicate the mix ;)

I want/need two spindles here - the main mill quill and a bolt on high speed one - this will be clamped to the main mill quill for starters. Yes it will reduce the Z travel a bit but lets see how it plays before version 2. The aux spindle will only be doing thin stuff and engraving etc so smaller Z travel is probably not an issue.

Obviously when i clamp on the aux spindle it will stop the main Z home functioning so i need two Z homes, maybe two Z++ limits as well?

Ideas -
Two Mach profiles? - The speed setup will be different for each motor, as will offsets probably and other stuff.
A switch for spindle 1 / spindle 2 - changes limits, motor control, vfd power, vfd control lines etc.?

Sounds complex but that's me all over, having this is crucial so I need to get ideas sketched up before I spend cash - it needs to be possible or the project will probably not go ahead. I am 99.9% certain it can be done, just need to get a head round what needs to be done;)
Bridgeport Mill, Mach3 V062, CSMIO-IP/A controller, AC Servo Drives

Offline Hood

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Re: Bridgeport Knee Mill Conversion?
« Reply #94 on: May 17, 2016, 04:22:38 PM »
Two profiles would likely be the best way if you won't be using both spindles from the same code.
Hood

Offline Davek0974

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Re: Bridgeport Knee Mill Conversion?
« Reply #95 on: May 17, 2016, 04:29:33 PM »
Yep, will only ever use one spindle or the other. I can definitely see two profiles being needed.

Looking for ways to switch all the lines needed -

Vfd supplies
vfd control and fault lines
vfd speed lines
limit switches for Z axis in two positions
homing for z axis in two positions
cooling pump for 24k spindle
probably others....

The programming for the CSMIO plugin I gather will need to be the same for both profiles?
« Last Edit: May 17, 2016, 04:31:08 PM by Davek0974 »
Bridgeport Mill, Mach3 V062, CSMIO-IP/A controller, AC Servo Drives

Offline Davek0974

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Re: Bridgeport Knee Mill Conversion?
« Reply #96 on: May 18, 2016, 03:31:12 AM »
Crunch time, orders to place, money to spend....

Got the screw kit sorted,
Got the pulleys sorted,
Got the controller sorted,
Motors...

Should I fit 750w all round or 750w to the X & Y axes and a smaller 200w to the Z axis ??

Just wondering about the ethics of fitting a big motor to the delicate quill axis.
Bridgeport Mill, Mach3 V062, CSMIO-IP/A controller, AC Servo Drives

Offline Hood

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Re: Bridgeport Knee Mill Conversion?
« Reply #97 on: May 18, 2016, 07:30:38 AM »
The programming for the CSMIO plugin I gather will need to be the same for both profiles?

No I don't think that will be the case, the info is held in the profile xml I think and it will load each time you pen a profile.
Hood

Offline Davek0974

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Re: Bridgeport Knee Mill Conversion?
« Reply #98 on: May 18, 2016, 07:35:05 AM »
OOh, nice ;)

Motors are on order - went for 750w on X&Y and 400w on Z.


Drive belts, was going straight for HTD5 belts but it seems the GT5 profile is better suited to higher power stuff with less backlash, trouble is i cant find a stockist!

The HTD is easy to get but GT ??
Bridgeport Mill, Mach3 V062, CSMIO-IP/A controller, AC Servo Drives

Offline Hood

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Re: Bridgeport Knee Mill Conversion?
« Reply #99 on: May 18, 2016, 07:36:47 AM »
I would go with the 750w for the Z personally, nothing really delicate about the quill other than the link between ball nut and quill and that should not pose a problem.
If you do go smaller I would say  400w minimum.


Hood