turns ratio for rack and pinion

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Charlie.G
Posts: 19
Joined: Thu Jan 04, 2018 9:46 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
MPU11 & GPIO4D -w/ 3rd Party Drives: No
DC3IOB: No
CNC11: No
CPU10 or CPU7: No
System Serial Number: none

turns ratio for rack and pinion

Post by Charlie.G » Mon Feb 05, 2018 10:13 pm

Hi,
I need a bit of help I have looked through most of the posts here
and I couldn't find info on using rack and pinion, I tried several
setting but the were way off at the 5 turns per rev it moves about 6
inches or so....here is my setup,
I have a cnc router with rack and pinion drive,
gecko 203v's, kelling motors, connected to a 4 to 1 belt drive
with 30 tooth pinions. the pinions have a pitch dia of 1.5 inches.
the 203v's are set up @ 2000 steps per rev.

Thank you,
Charlie

diycncscott
Posts: 698
Joined: Thu Mar 04, 2010 4:03 pm

Re: turns ratio for rack and pinion

Post by diycncscott » Tue Feb 06, 2018 8:09 am

There is nothing different about configuring a rack and pinion.

How far does the axis move when the motor rotates 1 revolution? That's the number that goes into the "Overall Turns Ratio" in the Wizard. By default it is set to 5 motor revolutions per 1 inch of travel. You can also follow this TB to set it. http://www.centroidcnc.com/dealersuppor ... ds/036.pdf

Charlie.G
Posts: 19
Joined: Thu Jan 04, 2018 9:46 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
MPU11 & GPIO4D -w/ 3rd Party Drives: No
DC3IOB: No
CNC11: No
CPU10 or CPU7: No
System Serial Number: none

Re: turns ratio for rack and pinion

Post by Charlie.G » Tue Feb 06, 2018 10:22 am

Scott,
thank you,
that is what I was looking for.
Charlie

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