#91
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Congrats Irfan. I'm anxious to see some pictures of your new parts.
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#92
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Quote:
Can you give us the info of the Spindle specs, and the website of Deitec so I can inquire as well from them for my prospective use? Thanks, WT |
#93
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Irfan & me both of us have ordered spindles and i have ordered steppers also. please wait for a week so that we can tell u the quality so our folks can proceed further.
Vishnu |
#94
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Hi Irfan & Vishnu, did you guys ever give us a link to Deitec?
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#95
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#96
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Some Closeups Of Spindleand Vishnus Steeper Moters
hI,
these are some of the pictures which vishnu sent me earlier.i still havent physically touched the spindle yet. i have a concerns about the motors we ordered for vishnu.these motors are 8 wire motors rated at 5 amps we need help in wiring this to the gecko 203 drive, should we do it half coil or full.this is a bit confusing for us. RGDS IRFAN |
#97
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The starting point for wiring those motors is to know the coil inductances. A spec sheet will tell all.
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#98
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product pics and vfd.
some pics of the work done on my smaller router.
this is a book rack designed by me - how I hope the mehmate was working - first I had to cut the 3x8 sheets to the required sizes and then load them on the machine - for the longer parts had to split the toolpath into 2. also the Delta VFD arrived today - the application engineer here is so friendly and promised to come and help me in my installation. RGDS Irfan |
#99
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Irfan I need that guy's name so I could ask if he will come and help me install one. I like your book case.
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#100
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Delta VFD's are fun . . . . . I have gotten 3 different models to drive spindles already. JR, can I come and help you?
Nice "technical" bookcase! |
#101
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JR, I called up the AE ' he's ready to come - and has a visa ready - he's just waiting for you to send the flight tickets
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#102
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G' I havent got any experience with the VFD, if that front panel removable and can it be placed where comfortable right - anyways I will also look into the manual.
RGDS IRfan |
#103
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Quote:
Normally you would only use the little panel to start / stop the spindle and set its speed, but we start/stop it with the PMDX122 and put another speed control potentiometer on the control box. |
#104
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Gerald I have 2 spare bedrooms. If you would like a holiday to southeastern North Carolina, come on down or rather up.
Irfan Gerald's offer didn't mention flight tickets so I had to go with him, sorry ................. I wonder how much Gerald eats in a week. Last edited by J.R. Hatcher; Wed 31 December 2008 at 19:53.. |
#105
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G' I was searching for a reactor for the spindle and VFD, they only provided me with one which I can use between the Power supply and VFD and not the one between the VFD and spindle - will this work for us?
RGDS IRfan |
#106
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I know too little about reactors to make a guess on this one.
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#107
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ok - the supplier assured me that I would be OK - so I am going ahead to use the one provided. will let everyone know if any problem arises.
RGDS IRfan |
#108
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gearbox comments welcome :
Folks - here is my design of the gear box - comments are welcome - especially those finding teh faults in the design.
RGDS IRfan |
#109
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forgot the pinion shaft
shaft added
the pinion shaft is 10mm dia. Last edited by javeria; Fri 16 January 2009 at 13:05.. |
#110
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Be sure to allow for adjustment. Normally the motor slides at least 6mm to compensate for differences in the belt and to allow the belt to be replaced.
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#111
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Irfan,
I noticed that the belt in your drawing doesn't show teeth. Is it a toothed belt? If yes, I have read (I don't know where) that a good quality toothed belt and gear system (often called a timing belt and timing pulley) has very little backlash, even less than gear-to-gear system. Is that your understanding? Regards, John |
#112
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Mike I modified the mount per your advise.
John you are right on every count i am thinking of material that can be used for this, I have seen Acrylic and Aluminum used so far, will delrin / ABS / PVC - can any of these be used? considering I am not tapping threads in them? RGDS Irfan |
#113
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I built one set of belt drive gearboxes from 1/2-inch polycarbonate, another set from 1/2-inch aluminum, and the final set from 1/2-inch Delrin. All three materials worked equally well. If I were to build another set, I would probably use Delrin, but I would use metal for the motor mount to help dissipate the heat better. One other thing that I would definitely do next time would be to cut the two main plate from 1/2-inch MDF until I was satisfied with the design. Looking through my drawings shows fourteen different versions, about half of which were actually cut. The only reason that I used 1/2-inch thick material was to allow the brackets to be pocketed for ball bearings. It would be much more time/cost effective to have the brackets laser cut out of 3/16-inch steel and then either use bronze bushings for bearings or cut some bearing blocks out of 1/2-inch aluminum or Delrin. (Even when jogging at 15-ips with a 1-1/2 inch diameter pinion gear, the shaft is only turning 200 RPM, so I doubt whether it's necessary to use ball bearings. Except of the mess of occasionally oiling bronze bushings, they would probably be satisfactory.)
(On my designs, I also slotted the hole for the shaft and the shaft slot was large enough so that I could remove the motor without taking the gear off the shaft.) |
#114
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Mile I took care of the words in the brackets,
folks teh pics are in no particular order - found out that I had made a few mistakes and I am still finding out and working my way through RGDS Irfan |
#115
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Irfan,
Nice progress. Thanks for sharing. It's good to see some step-by-step pictures of a build. I notice that the "bevels" are not yet on the Y-rails. Yet they are cut to length. Are you going to mill them? Regards, John |
#116
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I mentioned that I erred in a lot of places - congrats John - you caught one I am going to weld a extra piece of flat and then grind it. not the right way - but just a improvisation. Hey Vishnu are u listening mate - I need that attachment to grind the rails - send it to me fast RGDS Irfan |
#117
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Nice progress Irfan!
Want to choose a new title for your thread? |
#118
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This time your choice G'
RGDS IRfan |
#119
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Hi,
I'm busy looking at a 3:1 gearbox and like u'r design. Could u make the design avaiable. I'm using SolidWorks 2006. Rgds John |
#120
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John - once the design works - I will share the IGES files.
well - the control box went one step ahead now - you can see the pics attached From going to Coimbatore to visit Vishnu - I picked up the spindle and tomorrow will be off to purchase the tube - pump and radiator - need to get some U clamps to mount the spindle on the Z plate. Vishnu has given me some Z components and I will start working on it once everything is going in my hand. vishnu has not yet completed the rail grinding and so I could not get his attachment. One another thing Vishnu did not mention is the screw up the CNC guy has done to the V wheels - Instead of the advised 90 deg the wheels measured 70 deg which is a tad deeper and so we are back to sq one on wheels - we have asked for replacements. Gear box material was purchased by Vishnu so even that is coming from him - till then i have to mount bellows on my Ball screw machine which I will finish and also the cooling part - for the spindle for the mechmate. RGDS IRfan |
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