4'x8' RouteBot

[RouteBot]

I must be missing something. I have a NPN NC sensor as shown on the right of your picture. In the picture you have a resistor between the sensor output and +V. If I wanted to lower the voltage, it seems like I need to put the resistor between the output and -V.

I got it. The limits work as expected!! So I thought I needed a lower voltage and I put the resistor between the ground and the output. Your diagram is correct and I was over-thinking it.

Spindle and VFD are the next challenge . . .

[RouteBot]

After 4 years I'm happy to see it move. Still need to get the spindle setup in Mach, but everything else is working.

[arturod]

Wow, it is looking good. Have you pushed moving the axis at good speeds?

Tell more more about the spindle? What spindle are you using?

[RouteBot]

Wow, it is looking good. Have you pushed moving the axis at good speeds?

Tell more more about the spindle? What spindle are you using?

I have not cranked it up yet.

The spindle is a HSD AT/MT 1073 P/N: Y6162Y0017

TECHNICAL SPECIFICATIONS

Power S1/S6: 3Kw/3,60Kw
Connection type: Collet ER25
Rated voltage: 220V
Rated speed: 18.000 rpm
Max speed: 24.000rpm
Rotation: Right

The VFD is a Delta B series part #: VFD055B23A. It is a 7.5HP model but running on 220V so the HP rating would be reduced.

VFD specs: http://theservicegroup.us/wp-content...5011025710.pdf

[arturod]

Here are some recomendations:

- Before wiring the VFD, make sure you configure the software OK, and you have the analog output on the board working ok and the relays clicking like they should.
- You need to follow the instructions in the manual of the C32. Make sure you configure first the ESS plugin for PWM spindle speed control at 1000HZ.
- Keep in mind that you do not need to assing relays or outputs in Mach3, just step and dir pins on the spindle, and disable the relay outputs under Ports and Pins/Spindle.
- Keep in mind that you need to configure the VFD for control through the terminals, you need to enter into the configuration and change 2 parameters.
- You can wire the VFD using this wiring diagram: http://cnc4pc.com/Tech_Docs/C32R4andHuanyang.pdf Yes, it is a different VFD and different revision of the board, but the terminals are the same.

Let me know how it goes.

Arturo Duncan
Welcome to CNC4PC

[kevincnc]

Okay guys this is driving me nuts so I am going to hijack Allen's thread. About a year ago I built a small router with the same AMT encoders, and had no problem calculating the steps/in.

Allen used the automatic calibration in Mach3 and got the positioning pretty accurate. I don't consider the move and measure method to be a valid way to set steps/rev unless you have incredibly accurate measuring instruments. I'm calculating much different numbers, and wondering if anyone can tell me what I'm doing wrong.

For the Z: Encoder set at 2048 CPR, 20:72 pulley reduction, and 10mm lead ballscrew. So,

8192 Pulse 72 1 Rev 25.4mm Pulse
---------------- * ---- * -------- * -------------- = 74,906.6 ---------
1 Rev 20 10mm 1 Inch Inch

Mach calculated 13,333 pulses per inch.
X and Y use a 1" pitch diameter pinion with 10:1 gearboxes with encoders set to 1024 CPR. So,

4096 Pulse 10 1 Rev
---------------- * ----- * ---------------------------- = 13,038 pulse/in
1 Rev 1 Pi *PD (In Inches)

Mach calculated 6,336 PPI

He is using DG4S servo drives, and I don't see any step multiplication in the manual.

Have I become mentally challenged in one year? What's going on?

Kevin

[arturod]

Kevin,

Some things to keep in mind:

- A quadrature sends 4 pulses per step.
- The driver may be multipying steps. DG4S has 1X, 2X and 4X. I am not sure what you are using and if there is an option, check it.
- Commanding a movement, then adjusting the current steps per unit in the same proportion of the error will help you correct the steps per. You can do this twice, on a short distance to get an approximation, then on a travel as long as possible to get a more accurate number. Keep in mind the larger the traveled distance the more accurate the value.

I hope this helps.

[kevincnc]

Kevin,

Some things to keep in mind:

- A quadrature sends 4 pulses per step.
- The driver may be multipying steps. DG4S has 1X, 2X and 4X. I am not sure what you are using and if there is an option, check it.
- Commanding a movement, then adjusting the current steps per unit in the same proportion of the error will help you correct the steps per. You can do this twice, on a short distance to get an approximation, then on a travel as long as possible to get a more accurate number. Keep in mind the larger the traveled distance the more accurate the value.

I hope this helps.

Hi Arturo,
It's Allen's machine across the country, I'm just trying to help. I already multiplied the CPR X 4 to get steps/rev in the calculations. How do you set step multiplication in the drives? That doesn't seem like it would explain things.

Allen, have you made full travel moves and measured with a tape to check your steps/in?

Kevin

[arturod]

Kevin,

In the case of the DG4S you connect using the Servoconfigurator. Which is the software for configuring and tuning the drivers.

Arturo Duncan
Welcome to CNC4PC

[RouteBot]

After years of working on this project I can finally say it's basically done! All that needs to be finished is the spoilboard and dust collection. I could cut parts right now, but I'll wait till the dust collection is ready and the spoilboard is faced. I will post a video of it cutting parts in the next few weeks.






Thanks to everybody that helped me complete this router. As a person new to CNC, this was a challenge beyond my understanding. Without help from people in CNC Zone and others, it would be a big paperweight.

I purchased my BOB and other electronics from CNC4PC. That proved to be a wise choice, as the support was excellent. Arturo has spent time here posting in this thread and on the phone with me. I can say the electronics and Mach3 settings would not be working right now without him.

I would also like to thank kevincnc for his help over the past 4 years. He kept me moving forward. For every the curveball this thing threw at me, Kevin always had a solution!

[ger21]

Let's see some video of that thing moving around!!

[fretman_2]

I agree!!!

Let's see some video of that thing moving around!!

[RouteBot]

I agree!!!

I'll get some video soon. I am going on vacation and when I get back I plan to route the dado's for the spoilboard t-track.

Almost done with the dust collection. Got the ball joint over the table now. Also, got the dust shoe yesterday. Waiting on flex hose to show up.




Using 1/4" all-thread and beam clamps to hang the ball joint.

[kevincnc]

I would also like to thank kevincnc for his help over the past 4 years. He kept me moving forward. For every the curveball this thing threw at me, Kevin always had a solution!

Glad to help, my friend. Now let's see that thing make some sawdust!

[RouteBot]

Let's see some video of that thing moving around!!

Dust collection finished!


First cut video. Programed with Aspire 8.5 . . . it worked!! Note the dust collection was on and it was sucking up dust without the brush . . .


First cut setup

So now I need to get this thing squared up. I cut a rectangle 60" x 97" and measured the diagonal. It's off by 1/4". Is there an offset in Mach or do I have to use limits to square the gantry?

Also, when I ran the Aspire coded program the spindle came on at 16,000 RPM. I didn't program the spindle speed or the feed rate. Is that a default?

[pippin88]

In Aspire feed rates and spindle speed are per tool. The aspire help files are quite good.

[fretman_2]

Awesome!!!

[RouteBot]

In Aspire feed rates and spindle speed are per tool. The aspire help files are quite good.

I just checked and I see it now. First time doing this . . . I was just happy to see it work!

[arturod]

It is very nice. Make it go fast... Or you are not sure yet?

Arturo Duncan
Welcome to CNC4PC

[RouteBot]

It is very nice. Make it go fast... Or you are not sure yet?

Arturo Duncan
Welcome to CNC4PC

I still run it with my hand on the e-stop! I'll speed it up later.