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Author Topic: Is this backlash or missed steps????  (Read 7172 times)

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Offline RICH

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Re: Is this backlash or missed steps????
« Reply #10 on: June 11, 2009, 10:44:58 AM »
simpson36,
I never tried putting a some long value into the steps per unit, but you may want to try and then use the xmll reader to see what value is stored in the xml and if it takes it.
What does the manual say?
RICH
 
Re: Is this backlash or missed steps????
« Reply #11 on: June 11, 2009, 11:32:09 AM »
simpson36,
I never tried putting a some long value into the steps per unit, but you may want to try and then use the xmll reader to see what value is stored in the xml and if it takes it.
What does the manual say?
RICH
 

It appears Mach saves 6 only decimal places in the XML.

Regards,
Ray L.
Regards,
Ray L.
Re: Is this backlash or missed steps????
« Reply #12 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.

Offline docltf

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Re: Is this backlash or missed steps????
« Reply #13 on: June 11, 2009, 11:55:07 PM »
no it is not your drivers. post picks of your X and Y gearing setup. post info about all the gears, belts and the rack. include the part numbers and manufacture info. dont repost your earlier parts post. look on the belt and post the part number. teeth per ft on the rack, pinion size and count etc,etc,etc,. we will help you get it figured out.    a number like 1818.896532 is so bad .

bill


Offline jimpinder

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Re: Is this backlash or missed steps????
« Reply #14 on: June 12, 2009, 02:34:22 AM »
Ray - I didn't mean to argue - the way I saw it, the 0.2 is the pitch per tooth - thats how these  read in my catalogues. A 40 tooth gear revolving once would give 8 units of movement.

Perhaps mgandy02 can photo the set up and show us. Tell us what the movement is on this rack. i.e. how far does the table travel for one revolution on movement of the final drive.

Not me driving the engine - I'm better looking.
Re: Is this backlash or missed steps????
« Reply #15 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.

Offline Chaoticone

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Re: Is this backlash or missed steps????
« Reply #16 on: June 13, 2009, 08:20:27 AM »
I sent you a personal message.

Brett
;D If you could see the things I have in my head, you would be laughing too. ;D

My guard dog is not what you need to worry about!
Re: Is this backlash or missed steps????
« Reply #17 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.

Offline khalid

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Re: Is this backlash or missed steps????
« Reply #18 on: July 25, 2010, 02:02:45 AM »
Hi  Brett.. What Magic you send on the PM.. Kindly share with us!!!