Ah ok thanks, does it have 2 electrical connectors per solenoid then or does it pulse both?Quote:
Originally Posted by i2i
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Ah ok thanks, does it have 2 electrical connectors per solenoid then or does it pulse both?Quote:
Originally Posted by i2i
when the valve for the horizontal ram is off the carriage is held out under pressure, when it is on the airflow is reversed so the ram pushes the carriage in. Same for the up/down.
We have life on all three axis.
https://www.youtube.com/watch?v=i-B71XsYmLk
Nothing quick or exciting but executing some g code, slowly.
Next to do the spindle and home switches.
Thanks to all that have helped thus far.
Some bastard, 20 years ago, thought he would be funny by reversing the Z axis encoder ..... explains the odd behaviour that wasn't consistent. Why would it be different to X and Y?
I totally agree with the above comments and would add that I check the voltages on each leg and try to get equal voltages under normal load conditions. The run cap value will be determined by balancing the "leg" voltages, and the start cap value (which is usually only switched in for 0.5-1.0 seconds) will assist the motor to start to turn. G.Quote:
Originally Posted by m_c
remember the need for isolation on the 0-10, there cannot be a connection to ground it must be dc isolated.Quote:
Originally Posted by Chaz
He's good to Go i2i the IP-A 0-10v is isolated. As are all the I/O on the Cslabs controllers.!Quote:
Originally Posted by i2i
stunning, they look pretty good, i wish they were about when i had my three phase triac. Saying that i still have the servo's and drives here somewhere, could be good for one of my quatros.
On the topic of isolation, when providing 24V for the purpose of something like a limit switch, should this come from the same 24V that powers the CS Labs unit or one of the outputs of the device itself to try provide some level of isolation?
http://www.mycncuk.com/attachment.ph...id=15617&stc=1http://www.mycncuk.com/attachment.ph...id=15618&stc=1
i2i, I checked the measurements of the missing actuator last night in terms of the 2 threaded elements. The smaller end is M8 but I suspect fine thread. I tried to screw in a standard M8 bolt which it accepted but then stopped.
The hole size for mounting is just over 21mm, I think on the phone yesterday you thought this might be 27mm ish?
i don't remember the m8 thread being fine, and the mounting thread could be 22mm. It's been quite a while since i did one, check the one you have on there.
For limits Just use the same source that you power the unit with. But if you are keeping full Isolation using a separate source then best pulling from this and powering the unit for it's own personal source.Quote:
Originally Posted by Chaz
Personally I just pull from one source and never had any issues.
I thought it was M8 fine simply as the standard M8 bolt I have didnt thread, it started and then stopped. Could have been dirt but felt like a different thread.Quote:
Originally Posted by i2i
In terms of the mounting, yes, its around 22mm. The parker units I was looking at seem to be larger, might need to look at another option. RS Components has a number of actuators, not cheap, but have stock and variety.
RS are expensive for pneumatics, but they're mostly supplying repairers who will pay extra to get a machine back up and running quickly. Parker are also expensive if you're paying full price, but machine builders get quite big discounts, which is why they're so popular.
.
Try the Norgren catalogue to see if you can match the cylinders - http://www.norgren.com/uk/info/12/actuators
Once you have a part number, try googling it to see who can supply it. I've not used pneumatic actuators for a long time, but the hardest part was always identifying what you need.
.
There is a possibility the threads could be imperial, so could be worth investing in a couple sets of imperial and metric thread pitch gauges, as pneumatics/hydraulics still use quite a bit of imperial.
Ive looked at 3 sets of suppliers now including Norgren. For a 25mm bore, they all use M10 for the rod. I could drill / tap if needed, not ideal but if If Im not going to get the original part, Ill need to make a plan.Quote:
Originally Posted by m_c
Actually, thinking about it last night, when I checked, I was in a rush. I grabbed a bolt which I thought was M8 but I think its M10. Ill measure tonight to be sure. Ive found what I believe to be the same Joucomatic part as what is on the up / down, its also 10mm. The mounting nut is 22mm which is correct.
These guys will probably have what you want and just over hill in sheffied. . . . http://www.airaccessories.co.uk/
Thanks, have emailed them. A bit disappointed in many of the local companies. They clearly dont need my business. Have asked a few for assistance with little response. Hopefully these guys can help.Quote:
Originally Posted by JAZZCNC
OK, the thread is M10 fine for the actuators. M10 x 1.25, all the specs are the same.
this is weird, the last time i changed one of these i had no problem getting an exact replacement and as low as £12. It was a couple of years ago but there were loads about.
When I replaced a pneumatic lift ram on my SCM I contacted a company in Derby - SGS - tel no. 01332 576850. I ordered a ram at 4pm on a Friday and was told I could collect at 8 am the next morning. I thought that was fantastic service and the cost was less than 50% of the SCM part, I simply had to tell them the required cylinder dimensions, stroke, force rating and end connection details. I don't know if this helps, but it is probably worth a try. G.
LOL, take a guess what im doing right now?Quote:
Originally Posted by GEOFFREY
http://www.sgs-engineering.com/air-compressors
Snap!
I was going to order today for delivery tomorrow as Ill be home but didnt get the time and still undecided to what size compressor I need. I dont need much for the pneumatics on the machine but Id like something for cooling too. So looking at a 100L unit. I had a 24L Bambi before, lovely, but expensive and too small for continual air for blowing on parts / clearing swarf etc.
Ok, time for an update.
Had some setbacks with some of the electronics items, not going to discuss as such but many thanks to continued offline support from both i2i, JazzCNC and Gary @ Zappautomation.
Received my compressor today as well as the solenoid / actuator items. Got mostly working, missing 2 small 90 degree items, but its installed and wired up.
I tested the carousel motor for the first time today, spins along happily. I have no real idea yet how it knows where it is. I know there is a sensor, will try and look at that again later and there is an ability to reverse the direction of travel. Clearly it needs to 'know' which tool is currently selected.
Am hopeful that this weekend, unless I have issues or some delays on parts coming in, may be able to do the the first basic milling, with or without the tool changer working.
Dont forget to post some video at the end of that . Or to say at the start of the new journey:yahoo:
the sensor reads the position of the disc on the carousel motor
Thanks, but what does it output?Quote:
Originally Posted by i2i
I can see the motor can be reversed too using a relay called CCR. Is this commonly used in the retrofit? I know there are macros that 'know' that getting from 8 to 6 is quicker to go back 2 steps than forward by 6.
you can always add a switch to energise the valve for the toolholder cylinder, and change the tools manually.
Yep, that is one option.Quote:
Originally Posted by i2i
it's fed with either 5v or 12v, pretty sure it's 5v. It's basically a three wire proximity switch, gnd, supply, and output. It will give you a switched output relative to the supply voltage.Quote:
Originally Posted by Chaz
So does that basically activate when the proximity sensor is happy? So its a locator device?Quote:
Originally Posted by i2i
there's a point on the disc that is removed, this activates the sensor when it passes it. The logic in the macro needs to see this twice for one tool position
Hi, so update time. Mostly there now, busy wiring in the DC Drive input isolator. I just want to check, some of the wiring a bit uncertain about.
This is the board I am using, as recommended by i2i.
http://diycnc.co.uk/spindleV5x.pdf
On the board, I need to provide 24V DC, straight forward, I take from my 24V PSU rails.
I then need to provide the 0-10V output to the old DC drive, check, 2 wires, sorted.
I then need to provide GND, STEP, DIR and Run / Enable.
From my CS Labs unit IP-A, I get an Analog Output.
So, looking at the image below, I take from pin 7 (Analog Out 0) and pin 20 (Gnd) - do these go to the GND and STEP inputs on the board?
https://mail.google.com/mail/u/0/?ui...c667&zw&atsh=1
What do I use for DIR And Run / Enable then? Are these from my CS Labs unit (24V switched outputs)?
Chas I don't see an image!!
Gnd. Gnd
Step. This is a 5v logic level pulse and is normally a configured output from the parallel port that gives 2000 pulses for full output, which will be 10v dc.
Dir. This is a 5v logic level relay.
Run. This is a 5v logic level relay.
The board is basically a DC isolated frequency to voltage converter with two added relays
I am not sure what you are going to do with this board, the CSMIO/IP-A does not have any step and direction output, the controller has a 0-10V output that goes to the spindle speed control. If you need isolation because the current spindle has no isolation, then you are better to just throw the spindle away and stick an inverter and ac motor in the system.
Quote:
Originally Posted by Chaz
Sorry, I copied / pasted the post and was surprised as I could see it. Clearly no one else can ;pQuote:
Originally Posted by Clive S
See below.
http://www.mycncuk.com/attachment.ph...id=15708&stc=1
Ye, its just more money though that I dont need to spend.Quote:
Originally Posted by dodgygeeza
Ill rather get this working, if someone can help with an isolation option / circuit and then later look to put in a higher speed spindle which will be useful for cutting the items I want to cut.
Chaz send an email to Roy and ask him if the dc-dc converter is 1:1. If so you can probably run the ipa 0-10 through it instead of the generated voltage from the diy cnc board. ( please check this with Roy first )Quote:
Originally Posted by dodgygeeza
Thanks - just done.
Will wire up to be manually set for speed until I get some options.
Could I use the 5V from the Encoder output terminals on the CS Labs unit to allow me to enable the board? I dont have any other 5V supplied that I can use.