Messages

81

General Mach Discussion / Re: motors chatter

« on: February 21, 2007, 05:57:57 PM »

What kind of machine (computer and mill) do yo have? How fast, how much ram?
are you running any cam prorams in the background?

Chad

82

General Mach Discussion / Re: Help with conversion

« on: February 19, 2007, 08:57:09 AM »

Hi

You do not want to put caps across the motor leads. That would be very bad. DC servo motors rotation is dependent on polarity, if you give it juice one way it will turn forward if you give it juice the other way it will turn backwards this is all done in the servo controller. If you put a big cap on the motor leads it could lead to an exploding cap and a fried servo drive. Most big caps like the one you are talking about are also polarization sensitive if you hook them up backwards they can explode, sometimes violently.

The cap should be after the bridge rectifier on the power supply, the smoothing that you are talking about is for the ac to dc process.

A motor repair shop is most likely only going to have ac start or run caps they won't have what you are looking for.
You need something like this http://www.mouser.com/search/ProductDetail.aspx?R=36DY103F100CB2Avirtualkey61320000virtualkey75-36DY103F100CB2A

When you measured the output of the transformer was that straight from the transformer or after rectifying (ac or dc)? If it is ac straight from the transformer then after it is rectified it will give you about 73vdc (52 V * sqrt(2) = 73.5391052 volts) and that would be just fine for your motors.

As for the encoders, you should use the ones on the motors.


Chad

83

General Mach Discussion / Re: mach2 with max10 cl

« on: February 17, 2007, 01:48:10 AM »

You can go and download mach 3 right now. It will run in demo mode and run g code to about 1000 lines of code. When you get the licence you can just drop it into the folder and unlock the 1000 line limit.

Chad

84

General Mach Discussion / Re: feeds and speeds?

« on: February 16, 2007, 10:41:51 PM »

What horsepower is your spindle?
What material are you cutting?
how many flutes do your bits have?
What size bit are you using?
What is the spindle rpm?


Chad

85

Mach4 General Discussion / New people welcome !! Come in here and introduce your self!

« on: February 16, 2007, 04:05:02 PM »

I was noticing that as of this writing we have 2795 members and have only heard from a couple of hundred and an even smaller number of regular posters.

So if you are new around here please post and introduce your self.  You could give a little on your background, hobbies , how you ended up here, whatever!

This is a site to help with mach. There is a great talent pool here already but this is a community driven site and we would love to hear from the silent masses

So stand up and say hi!!

Thanks,

Chad

86

General Mach Discussion / Re: mach2 with max10 cl

« on: February 16, 2007, 03:44:48 PM »

HI, chvet73

Don't even bother with mach 2 it is primarily there for some legacy oem's.

Just go download the latest version of mach3 and start from there. If you are are running the demo version you won't have to worry about anything. If you purchased mach 2 than just copy your licence file from your mach 2 folder into the mach 3 folder and you will be good to go. The licence will work with mach 3 and be fully legit.

Lots of people have switched from Maxnc to mach and we should have no problems getting you up and running.

Chad

87

General Mach Discussion / Re: Going from Solidworks to Mach3

« on: February 16, 2007, 03:32:25 PM »

Well that depends on your budget. Plan on about $10,000 for mastercam x with 3d capabilities. Solidworks is $3000 to $8000 depending on features.

These prices pretty much put this stuff out of reach for the hobbyist.

For hobby 3d cad there is http://www.alibre.com/. they have a free version that is limited but still a great package.

For hobby 3d cam there is meshcam  http://www.grzsoftware.com/

for hobby 2.5d there is sheetcam http://www.sheetcam.com/

Chad

88

General Mach Discussion / Re: temperature alarms for motors?

« on: February 16, 2007, 03:23:10 PM »

Hi guys,

Just a couple of comments. You didn't say if they were servos or steppers.  Steppers are designed to run hot, like hotter than you think they should be but if you are burning out coils than you need to back down the current to the motor. Cooling won't help with a over current coil open.
Now you might be saying if I turn down the current than the motor is not fast/strong enough. In this case you need to fit bigger motors. If you are  running them so hard as to burn them up/out to get the performance then you just need to get into a bigger motor and lower the safe operation area.
Same goes for servos.

One of the strange things with steppers is they pull pretty much the same amount of current at a stand still as they do at full speed. Knowing this a thermal alarm for mach won't do any good unless it actually cuts power to the stepper drivers. Again steppers do run HOT but if yo are burning them out you are just running them TOO hard!

.02c

Chad
 

89

Show"N"Tell ( Your Machines) / Re: Eagle KM-750..Anilam Crusader GX-M

« on: February 14, 2007, 03:12:13 PM »

Brian: I am feeling old too..

0:

Chad

90

Works in progress / Re: 3 Axis Simple Screen setup 1.0 (Also good for TouchScreens)

« on: February 14, 2007, 02:52:53 PM »

Any model of tin foil hat should work just fine. Just make sure they are grounded. Faraday cages don't work unless they are grounded.

Chad