Now to figure out the enclosure.
Attachment 265784
Printable View
Now to figure out the enclosure.
Attachment 265784
modelaratrod
Find attached screen shots from my setup. Can't attach to PMs.
John
Here's where I'm @ driver is 3.5 amp micro stepping set to 1/10 or 2000 steps per revolution, 2:1 gear reduction gear heads running on a 14.5 pressure angle 24 pitch R&P with a 24 tooth spur gear with a OD of 1.083"
I told the axis to move 16" and it moved 41"
16/41=0.3902439 and divide Pi by the gear ratio? 3.14/2=1.57 so 0.3902439x1.57=.612682
I see you have your gear ratio set to 5.0 and your screw thread is .31833
modelaratrod
Check the settings on your stepper driver, from the distance moved and your other entries it may be set to 4 microsteps per step instead of 10.
If your rack and spur gear are 24DP then the pitch diameter is 1" or pitch circle of PI for a 24 tooth spur gear.
So the screw thread that Torchmate or Flashcut wants is Screw Thread = rack teeth per unit length/ tooth pinion = (24/PI)/24= .31831, mine is not set to the theoretical number because that is how I fine tuned my motion.
Check and fix the settings on your stepper driver or enter 4 microsteps per step in the Torchmate or Flashcut SW.
Mine worked by the book for getting close. I measure the gantry movement with a dial indicator then and adjusted the screw thread number until 1" commanded gave 1" on the indicator.
John
I have the gear ratio tuned in and can run 600 ipm rapids. :-D
https://plus.google.com/photos/11304...06183670155932
Here's the almost finished product, I used a different enclosure.
Attachment 326100
Did you get your machine up and running?
Yes it's been up and running for a good while now and working good.
Nice! I'm interested in the speeds you are getting. I built a 5x10 heavy duty gantry router, I use a router, mill head, drag knife, ..., and have an outrigger to hold a plasma torch out over a water table that connects to the main table. It has worked great for ~15 years. I want to build a 5x12 dedicated plasma table with a light weight gantry to get the speeds up for light stuff. I cut from heavy 1" down to rusty .020" roof metal.
If you don't mind a few questions,
Did you use 23 or 34 motors?
What oz rating?
Looks like you have 2 motors on the gantry travel?
What drivers did you use?
I'm running str8 drivers and ht23-603 motors from applied motion technologies with two motors for the x "long" axis.
Thanks modelaratrod, what is the max speed you can cut at, does it do corners at a good speed?