Messages

1

General Mach Discussion / Re: Is this backlash or missed steps????

« on: June 15, 2009, 08:56:44 AM »

Thanks for the help Brett.
After we did a couple of moves and set my steps per to a good round number I was able to fine tune it without the auto function. After getting it +/- 0.001 I did as he suggested and got my backlash comp. set. It is running pretty good now and accurate enough for me and wood work. It won't have to go on ebay after all.
Again thanks for the help.

2

General Mach Discussion / Re: Is this backlash or missed steps????

« on: June 13, 2009, 07:34:15 AM »

I hooked up my o'scope to the step and common on the 203V and ran it. Should I be getting 25KHz. I am only getting 3.3KHz and 5.5V at 120 ipm which is the max on the motor tuning. I will post pics of my setup later today. Thanks for the help so far.

3

General Mach Discussion / Re: Is this backlash or missed steps????

« on: June 11, 2009, 11:27:21 PM »

I'm about to pull my hair out. I reinstalled mach and did my driver test. Everything shows good. The auto function that sets the steps per inch states my new value should be 1818.896532. Ok. So in my motor tuning on the X axis the steps are set to 1818.896532, max speed is 120, Step uS is 0 and dir is 0. I open the jog screen and set the cycle jog step to 1.0. Next I zero the caliper mounted to my X axis. I make 4 moves in the + dir on the X axis and come out with the following: 0.995, 2.014, 3.034,and 4.055. I zeroed it again and made 4 more moves in the - dir and had these values: -0.995, -2.012, -3.031, and -4.047. I have checked everything I know. Could this be a drive problem (203V) or a motor problem (KL34H2120-42-8A). My pc has 2.5 GHz pentiium and 2 GB of memory. The only software that has been installed on it is Windows XP and all of the updates and Mach3.

4

General Mach Discussion / Re: Is this backlash or missed steps????

« on: June 10, 2009, 04:38:01 PM »

I am still a noobie so forgive my ignorance but why would those numbers not be pretty. If i multiply those by the microstepping of the geckos i would get 1551.76 for X and 1637.70 for Y.

5

General Mach Discussion / Re: Is this backlash or missed steps????

« on: June 09, 2009, 05:35:20 PM »

I have rack and pinion on both the X and Y axis. I am using the 1200 oz motors from keling with the 72v 20A power supply. They X axis is geared 4.875:1 and the Y axis is geared 5.143:1 using timing belts. Boths have 40 tooth 2.0 pitch diameter pinion gears on racks. Can you tell me how to calculate this. I have just been using the set axis function in Mach. Thanks

6

General Mach Discussion / Is this backlash or missed steps????

« on: June 08, 2009, 07:51:19 AM »

I have had my router going for about a week now and have cut a couple of simple shapes with it. This morning I tried to cut out something a little more complex. Not a very good idea. I will describe what is happening first. Doing a simple move to check my steps works perfect, If i tell it to go 1" it goes 1.00". Great. Next cut out a square or circle again perfect ( or good enough for wood ). Then cut out something that is going to take a while, Not great. I wrote the macro that it describes in the config guide that follows:
F400
G20 G90
M98 P1234 L10
M30
O1234
G1 X20
G1 X0
M99

After the 10 moves the X axis will come up 0.011 short from zero, So I thought to double it. After 20 moves of 20" it comes up 0.022 short of zero and it doubles again after 40 moves. I have a moving gantry type (4'X8') with the 1200oz motors and the 72vDC supply from keling driven by 203Vs on both the x and Y axis. THe kernal speed is 35000. I have also tried the backlash function but that doesn't seem to work either. The same is happening with the Y axis also. The only difference is that is starts out as being 0.015 over with 10 moves of 20" and doubles with 20 moves then doubles again with 40. I have R&P on the X and Y axis with a set of timing pulleys to gear down. At first I was running @ 400 ipm then went down to 50, the same result in both cases.
I someone could help of have any ideas I would appreciate it.

7

General Mach Discussion / Re: Mach3/XBOX 360 Controller Question

« on: June 01, 2009, 03:31:40 PM »

I just got my new XBox controller in and cannot get it to work. In Mach on the plugins configuration screen in the bottom left it does not show a controller connected. Neither the wired or wireless is selected then I looked at the manual again. My product id is 0x028F. That on doesn't show supported. Does anyone know who I should ask about this. In the manual is states "The plugin currently supports 3 Microsoft ProductIds (0x028e, 0x0719, and 0x02A1). If
you have a different one, let me know and I'll add it." Who do i let know? Any help will be appreciated.