Bill's new machine

[ClearCaseMan]

Thru a strange turn of events I have aquired an older Vy-Tek rebel II laser table, without the electronics. it took a lightning strike and was being sent back to be fixed. well the trucking company dropped the machine and broke the belts. well, after everything i have been given the machine and ned t find belts for it. since everyone here has been so awesome with help I was hoping to find a resource for the belts here. I am gong to rebuild this machine and make it run from Mach3. this loses me some fnctionality, but I wint have 300k in this machine either. here is a pic of the belt. it is 2in wide and 3/16 from valley to valley on the grooves. I will look for some pics of the machine, I do not pick it up for another week.




Thanks
Bill

[ClearCaseMan]

Okay,
Here are pics of my new project and its brother.

[Chaoticone]

Bill, go here, http://www.mcmaster.com/ and do a search on Open Ended Timing Belts.


Also, there are different tolerances for different series belts. May want to do a little research before choosing. Worse case would be to get new pulleys to match the belts you need. Some have a stainless wire core that won't stretch.
Brett

[ClearCaseMan]

Brett,
Thanks. These belts do have something inside them, I thought it was kevlar strands but wasnt sure.I played with it some today and to be sure if the strands were metal or not I used a multi meter and tested for cont. and the strands are cunductive. I am gonna go out to mcmaster and look some. they seem to have a little of everything Brett one more question. how can I tell what sized motors are used on the table? I figure it is a simple proccess of measuring the screw mounting holes and knowing the shaft dia. is that correct?




Thanks
Bill

[Chaoticone]

That may help some. Could find out if they are nema 23 or something. Would be best if you could get a part Mfg. Name and part number off the motor.

Brett

[ClearCaseMan]

Here are the pics of the old motors. I wasn't able to get them with the machine, although I think my life will be easier to pick motors and controls that match instead of chasing a controller that may or may not exist at this time.








The shaft Dia is 3/8

[Hood]

All the info you need is there, they are both  DC Servos, 3000RPM. First one is 54V, 7.8Amp continuous current and 1.08Nm. The second is almost the same but slightly up on torque being 1.1Nm and current is also slightly up being 8amp.

Hood

[ClearCaseMan]

except that info does not do me any good at all. I did not get the motors or controls. I need to know what sized motor will fit back in there and a controller to tun them, but first I need to get the belts for it(which I found) they will only cost me 400 for the pair (A good deal less than from the manufacturer). this machine ran off of its own controller, I only got the machine itself. there are no electronics there except the limit switches. what I am going to do it refit the machine with new motors and controllers and run it from Mach3. and with the creation of Brett's new usb controller I believe I will be much happier.

[Hood]

Well if thats the motors it originally had then I would say you should get similar sized ones again so to my mind that info is exactly what you are looking for. Because you have no electrics at all it makes your task even easier as you can get everything matched. Lots of places you will find DC Servos, one I know of although have no experiece of is http://www.kelinginc.net/ServoMotor.html


Hood

[ClearCaseMan]

Thanks for that link, I am sorry I didn't mean it that way about what I needed. what I mean is I am not limited to what ever controller I can find for that motor. I have the freedom to match everything together and have it all work like it is supposed to. not make do with a controller that supports the drive but not the optical encoders on it. with the home brew table I got off of eBay a while back I was limited with everything because of a lack of documentation and labels. no one could identify the parts and I wasn't able to find a more powerful motor to drive that unit. this way I can spend money only once and have it done the way it needs from the start. I really hate to have to keep redoing things to make them work.