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Messages - Matthew_Jones

Pages: 1 2 »
1
General Mach Discussion / Re: MM and Inch Motor setup
« on: August 16, 2015, 07:53:37 PM »
Yep that did it. Your making my day now. I have searched a few times and came up nothing valuable. I am sure its out there but you know google.

I appreciate it a lot.

Thanks
Matt

2
General Mach Discussion / Re: MM and Inch Motor setup
« on: August 16, 2015, 04:26:58 PM »
Thanks Gerry. I wasn't sure how everything in those setting related to each other.

While I got your attention is there a place to set the Default FeedRate for jogging. I have to set it under feed rate prior to using jog. It defaults at 6 and I was wondering if I could default it higher.

Thanks again for help.

Matt

3
General Mach Discussion / Re: MM and Inch Motor setup
« on: August 16, 2015, 12:39:39 AM »
How do you come to that? I understand the steps I just don't understand the other 2.

Thanks
Matt

4
General Mach Discussion / MM and Inch Motor setup
« on: August 15, 2015, 09:47:41 PM »
So I searched this bit but I am still confused. What I found didn't work.
So I have Chinese CNC they sent instruction that run it on MM, but I want set up a profile in inch's as well.
I know I have to make changes to the Motor Settings.

My Steps per are 320
Velocity is 1500
and Acceleration is 300.

I am not sure which way to times, or divide by.

Thanks for your help.

Matt

5
General Mach Discussion / Re: Unequal Backlash
« on: July 13, 2015, 04:16:17 PM »
Thanks a bunch. I'll look and see if its loosing steps, I have noticed some funny numbers occasional I didn't understand. I haven't got homing set up but I can set that axis and check that. The machine has its own coordinates displayed (According to what I am not sure) but they tend to line up real well. Mach and the machine, down to the .001 decimal if a millimeter.

It has 1605 precision ball screw for the movement but maybe since its Chinese.... I figure I'll find something loose hopefully nothing worse than that.

I'm also going to spend a little more money on a dial indicator. At least have 2 of them telling me something wrong.

I am grateful for all the advice. I probably will have more questions soon.

Thanks
Matt

6
General Mach Discussion / Re: Unequal Backlash
« on: July 12, 2015, 07:33:01 PM »
How do you test for loosing steps?

Matt

7
General Mach Discussion / Re: Unequal Backlash
« on: July 12, 2015, 12:38:03 PM »
If you have backlash enabled, turn it off and test again.
Hood

No it wasn't enabled.

8
General Mach Discussion / Re: Unequal Backlash
« on: July 12, 2015, 08:25:44 AM »
If that's really true, then if you did this 10-11 times, then the machine would be 1mm out of position.


It does stack up like that. You can see it in the circles I am cutting. One side has bigger flat spot than the other and often the start point is not the finish point. Not always though. I have adjusted alot of it out but still get flat spots and thats the only thing I can't get rid of. If I set backlash .05 the lesser reading then only going the other way seems to cause a problem. I am clueless.

Could be due to a number things.
One needs to know the cause of the backlash and that can only be done by trying to isolate each  mechanical component
in a very meticulous way to find the causes. Note that there is no such thing as "zero" backlash and there is no substitute
for quality components.

RICH

The machine seems high quality. I wonder if it could be a combination of things. I am having a hard time trying to figure out what to look at specifically and it what order.

This is the machine

I'll take any pointers I can get.

Thanks
Matt

9
General Mach Discussion / Unequal Backlash
« on: July 12, 2015, 06:50:12 AM »
SO I have been fine tuning and trying like hell to get the flat spots out of my circles. I got a dial indicator went to set the back lash and found something funny. Before I tear the machine apart and tighten everything I want to ask.

The problem is on the Y axis. If you are travel in Y+ the reverse to Y- the backlash is .05mm. If you are travel in the Y- and reverse to the Y+ the backlash is .13mm.

So maybe this is mechanical but I sure would like a few opinions before I go tearing into this machine.

Thanks
Matt

10
General Mach Discussion / Re: Jog issue
« on: July 02, 2015, 07:06:04 PM »
I figured this one out. The machine actually has an OS an it needs to be tuned as well. I completely missed it.

Matt

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