#61
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Good day to everyone, and I am happy to be back again. I will post some photos later on to give you an update on the progress me and my friend have made since last time.
At the moment we are choosing appropriate gas spring. I found one that it rated at 500N. It doesn not feel right when I press it. As a rule of thumb 500N is around 50kg this is the force I have to use to make it work. Taking into account the weight of them parts involved directly is this gas spring to stiff? The stroke is right for the 350 tube but I am worried about the motor if it is gonna handle the force. |
#62
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Unfortunately the 500N is far too much!
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#63
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I received screened cables and will do the drilling on pinions cause the hole diamiter does not match the size of motors shaft. Will post some more photos soon. I have two weeks holiday and I hope the machine will be moving in two weeks time. I cant find right sized gas spring. Decided to order chinese water cooled spindle as well. It will take some time before we receive it but we will be busy anyway.
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#64
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Looking very good Martin! You'll be up and running very soon. Happy Zubr to you
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#65
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Thank you Greg, I am still waiting for thins to arrive. The spindle has arrived in
Poland. This is quite fast actualy, I only paid for it last week. I also ordered some other stuff from local sources but they gonna take longer to arrive than that spindle from China. I found 150N gas spring and it is used in agriculture equipment like tractors, it is far more weaker than the one I had previously with 500N. At the moment we are working out how to cool down the spindle. We decided to use 110V pump that we found in a machine used for developing pictures from a film. Old school equipment. Will post some more pictures soon. I ordered some more push buttons as well. So the wiring shall start as soon as we receive them. As far as the proxies are concerned can all four be connected in series to a pmdx board? Or do they all have to be wired independetly? This is the one I would like to use IME12-04NPSZW2K it is M12 4mm range NO PNP |
#66
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This is the pump and radiator is from ford sierra. Got it from scrapyard. All together with the fan connected shall be sufficient enough to cool down the spindle. What do you guys think about that solution?
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#67
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Hi Martin,
You need some more stuff. The radiator you have will act as a condenser and must be linked to the high pressure side of the compressor. The outlet of the radiator must be connected to a flow restriction device, normally a capillary (small diameter) tube. This can then go into a water container with a 1/4 inch copper coil to remove the heat from the water, which then circulates to spindle. Solder everything up with coppertec. I would not circulate the refrigerant to the spindle. Pressure test your system with nitrogen to detect any leaks, evacuate down to 500 um to remove any moisture and charge with R134A, any other refrigerant will damage the compressor. Better to have a cousin in the refrigeration business. Jan |
#68
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Thank you Jan for your input. I was thinking that the radiator would absorb the heat from the water while flowing through it. The fan that is shown in the picture is to ventilate the radiator so that the heat is reduced. Hmmm, how hot can the spindle get anyways? http://www.youtube.com/watch?v=2OZCviK0msg I saw this video and liked the idea. I am getting same spindle.
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#69
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well chk this cooling I have done to a similar spindle
http://www.youtube.com/watch?v=a04a_FtbR44 no problems even when working for the whole day - only see that your pump is rated for continuous operation, (it should be brushless) the radiator is essentially un-necessary. and I would not like to have extended wiring on the y car for the pump etc, better to have it located in a static position. The tubes are really cheap - RGDS IRfan |
#70
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Jan, you are are thinking of a gas refrigerant system, which completely misses the basics of a standard water-cooled spindle.
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#71
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Ja, got it! Somewhere between 2 and 5 this morning.
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#72
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Thank you Ifran for your link, It is great. I plan to do something similar. Although I would like to have my cooling system located on the gantry.
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#73
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Can anyone please tell me why it does not work when I try to use this extention? When I use regular cable it is ok. But when I the one in the photo it is different. I wanted to make some drilling to locate the xtention on the side of the control box and then plug the cable to it from computer.
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#75
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Jack, I copied his post to the other thread, where I thought there would be more readers - but I forgot to add my normal note.
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#76
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I have received my spindle and VFD today. The spindle itself weighs 5.5 kg. I also received phoenix din rail block connectors and interface relays as well. So the wiring of the machine should start soon. I am still waiting for 3 more proxies and of course a gas spring. It all takes so much time for me to grasp the knowledge as far as the electronic is concerned. Now my main concern is to find right way to connect the VFD and the spindleWil keep you posted
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#77
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Hi Martin, There are threads on here and elsewhere which explain how to wire it up. I am hopefully going to wire mine up tomorrow (if cable arrives) so once ive done it if i can help i will.
Hopefully be cutting at the weekend Andy |
#78
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Thank you for your input Andy. I received email from the seller and he recomends programming the VFD before running the spindle.
I just tell you how to set up vfd as following Firstly, adjust the PD013 to 8 Secondly, adjust the PD005 to 400 Thirdly, adjust the PD004 to 400 Finally, adjust the PD003 to 400 Note: you should set PD013, PD005 ,PD004,PD003 in order. It mean you should fistly set PD013, then PD005, then PD004, finally set PD003. Note: after you set the all above, then please recheck the PD005, PD004, PD003 value is 400 or not to confimed that you already set it. The reason we let you recheck is that if you do not set it at 400, then when you run the spindle motor, the spindle motor will be over-current, then the spindle will very hot and then within 5 minite, it will broken. Regards Aoran 4. Note, please use the clean water to cool the spindle, and also do not let the dust to dirt the water. If the water not clean, it will lead the spindle to jam. This is what I received from him. This may help you program yours. |
#79
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Testing or actually tunning the machine we are now. At the moment all the wires are run through. I am trying to set Mach3 for optimal configuration. I get wierd sound whenever the speed reaches 360. The motors lock up and then move again when the speed drops. I am using geared motors unipolar connection using four wires out of 8. My power supply deliveres 33 VDC to the drives. I think it might not be enough for faster speeds. I got the steps set for 127.388 with 36 tooth pinion. I am gonna try and adjust the tripot next time and see what happens or replace the tansformer to raise the voltage.
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#80
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Martin, have tried using a different computer? I don't think you have a voltage problem.
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#81
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I have replicated that speed ceiling problem with an underpowered pc as well Gerald.
Have you tried running the speed test in Mach 3 to see if your PC is compliant? |
#82
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Well, this is the second computer I have tried so far. The first one was older and weaker but seemed more stable as far as the test is concerned. The one I am using now is more powerful. There is 2G ram and the processor speed is 3GHz. Nonetheless, both computers seem to fail if what you say is true that my power suply should be ok. I am gonna try third computer tomorrow.
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#83
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Can you give us your .xml setup file from Mach? I would like to check if you set the machine to run mm or inches, then to check the Motor Tuning for motor speed and acceleration.
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#84
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Hey Gerald, I just returned from a trip to a shop. I couldnt wait till tomorrow. Tried different computer. The one I tried now was outstanding. It is what you say about the computer it cant be to slow or to fast. What a relief. The sound of the mtors moving so smooth. Before it was like shaving with blunt razor and now with that third mid range computer it is like heaven. Such a difference. Thanks a lot for advice. Will post a video on Youtube soon. I have settings in mach in mm and M1 module 36 teeth and 127.324 steps and 45000Hz kernel speed. Now I need to get a different PC.
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#85
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....shaving with a blunt razor? I have forgotten about shaving over 30 years ago!
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#86
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Gerald does not have TIME to shave...too busy helping and keeping this forum in top notch.
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#87
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Gerald,
I continue to be amazed that you can diagnose all of these problems based on sketchy details from all the way around the globe. I chuckle every time. I just can't figure out how you know so much about everything. |
#88
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I am pround to announce that we had first movement. There is a link http://www.youtube.com/watch?v=Q0bZV80Xmj4. I also tested proxies and they are working as well.
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#89
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ha ha ha - is that you hiding behind the machine
congrats on the movement |
#90
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Well Done Martin! Dust is just around the corner.
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