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Messages - Raca

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It's good to hear somebody that continues work on Dyna. I have finish mine, and results is: First I have to remove all electronics form Dyna 2400, second I have removed all transmission in all 3 axes and changed to THK ground ball screw  witch I have obtain from  "http://www.ebay.com/sch/jak8858/m.html?_trksid=p4340.l2562" this guy. No need to buy new one, this are in excellent condition. Look for C1 quality, and 14mm diameter with 4mm lead. You need to do some more adaptation to connect this to machine. I have used R+W couplers for connecting this ground ball screw to motors. This is my recommendation, and for third I have changed motors for servo Sanyo Denky from this guy "http://www.ebay.com/itm/Sanyo-Denki-BL-Super-P5-Servo-Motor-P50C08075HXS21-750W-/400251738520?pt=LH_DefaultDomain_0&hash=item5d30dcd998" and after this I have used Teknic servo drive witch made this system works. Smooth stepper is necessary to be in this configuration, and you can have fast machine (3.5m G0) and precision of 0.00025mm theoretically. In practice I have checked out to 1 micron repeatability in all axes. Now, I'm working on 4th axes and results will come in the week. If you need some advice just send post. Best regards Sasha

You may finde at Schaublin or Iscar!

Competitions / Re: ******Guess and win a G100 Grex******
« on: May 23, 2007, 11:50:08 AM »
Too old to count ,
too young to die !

 Hi everybody ,I have found one Dyna 2400 two years ago on the e-buy and I did full retrofit by renewing  old Dyna control, power supply and driver. Dyna has made originally at the power limit not for stabile long-term run and low quality components. Made not to last, at least my show that marks. We have made new driver and now run in the half step mode. Motors are tuned up and now we have 30% power more in full step and some 15-20 %  more. This is the largest problem of Dyna. 27 oz power for this cast iron machine is to small but it can run. I have made 5 axis control but it was run only in 4 axis simultaneously. Still work on construction to make precise ficsation of one sherline rotary table positioned normally to another. First of all I needed to change rolling bearings on the spindle and my advice is to use p4 standard of bearings and SKF LGLT2 grease for lubrification (permanent) .Spindle will run smoothly and with less noise. We did make new control for the spindle and now we have achieved 180 rpm minimal and regular 10000 rpm for the top speed, but we have made that we can reverse direction and have vector control . That means we can cut the screw (sorry for my English) I don't know proper word for all technical process but I hope you will understood. this means that we can control speed from the Mach 3 but Dyna's head is the weaker part of the macine, beacouse is made from Dural and vibration that pass thru make small problems. I have found Precise SC52 spindle with 60000 rpm and it is now on service but after I believe that we will doo much bather job. Precision of old head is to make around 0.01 mm in production and much precise in positioning. I wanted to have control of positioning corrected from linear scale but Mach3 can't  support that and I hope that new version will do that .So all yellow cabinet was put in the waste  and new electronic has made. My advice is don't try to make old electronics to work, I have spend 6-7 months try to figure out what is wrong. If you have question send me a message. Best regards Raca Sasa

General Mach Discussion / Re: NOTEBOOK PARALELL PORT CARD
« on: December 26, 2006, 11:33:48 AM »
Yes this is something that still work on my system. I didn't try Bryan's system ,but you can work for shure  with Transnet digital PC MCI to parallel card. Parallel port communication is something that is mather of the past but Brian's sugestion will work whit  new Mach realises.

General Mach Discussion / Re: Using Mach3 on notebook
« on: October 04, 2006, 10:21:05 AM »
Yes you can use traansdigital PCMCI card to parallel port and will work perfectly. I have notebook Toshiba portege 3480 CT ,600MHz and 192 Mb ram memory, and I had same problem . This solved it witheout any problems. If you have some more question please do not hesitate to contact me. Best regards Raca Sasa

Thanks Dan,
I also will use rotary table at the low speed, but I need high accuracy since my intention is to cut Wheel and Pinion for watch industry, and I have  backlash on gear transmition , other parts are well made. Sarline make upon one revolution of handle 5 degrese on rotary table, but on the handle you can feel  backlash of 3 degrease. Can that be solved thru Mach3 backlash adjustment, will that work? Raca

General Mach Discussion / Rotary table, home switch & backlash . . .
« on: August 10, 2006, 08:28:28 AM »
I have both recently Sharline CNC ready rotary table, but without home position switcher and with noticeable backlash. Das any of you people had same problems with this. If you can suggested suitable switches for it and idea how to fix backlash on rotary table. Best regards Raca.

General Mach Discussion / Re: Linear scale
« on: July 26, 2006, 02:39:38 AM »
Thanks for your answer. Yes, this is what I wonted to know, so I need Grex G100 control unit, but that opens new questions. If MACH3 can read 3 linear or rotary encoder and I need to read 5, do you know can MACH4 read 5 (3 linear and 2 rotary)?

General Mach Discussion / Linear scale
« on: July 25, 2006, 02:35:05 AM »
Can anybody tell me das Mach3 support control thru linear scale? Maybe I did not post right question .I am interested to put linear scale to my machine (DYNA 2400) step system and I want to have control established thru feedback from scale not from counting the steps of my motor.

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