Messages

101

Show"N"Tell ( Your Machines) / Re: 1997 DYNA MYTE DM4800 VMC to Mach3 Conversion

« on: November 18, 2011, 01:47:53 PM »

JH,
    Hey man that is looking BEEFY!!   So those are new motors them?   I love the looks of the dual  ways underneath that table. This should be a real stout machine when it is finished. So are you using MACHmotion parts or control on this machine?   They seem to have nice stuff but it is expensive...   You mentioned Teco drives, that is the servo drives for the axes right, I have had very good luck with my Teco Sensorless Vector drive here especially since it is under modbus control. I would not hesitate to  buy their products again. If you are indeed looking at new servos and drivers for each axis, about how much money per axis are you into it for?  I am watching and learning here man and hope to someday follow in your prodigious footsteps with my own VMC conversion.  It sure does look like a lot of work tho.  Good luck with this baby and I cannot wait to see some videos of cool parts being machined on it. Peace my friend...

Pete

Pete,

Yes these are new TECO Servos with matching TECO drivers.   MachMotion is just the source that I decided to buy these from.   Each axis is about $1100 from MachMotion, about $100 less than other places when your just buying Servos and Drivers.  Also, I really like the fact that I can call or visit them if /when I have tuning issues or need other technical help.  You can get cheaper servo systems on eBay, but I’m not so sure about technical support, returns or warnetee from these systems.

I did pick up 2 more servo systems for the X and Z.  Just getting started on this… I should have all 3 Axis moving in a couple of days.

JH

102

Show"N"Tell ( Your Machines) / 1000W 1000RPM Servo

« on: November 14, 2011, 03:56:54 PM »

Good news, the guys at MachMotion were able to help with the tuning of the 1000W 1000RPM AC Servo System.  They were very professional and knowledgeable of these TECO Servos and from the looks inside their shop, they have all kinds of cool stuff in the works.

I placed the table to the far right for max load on the Y axis for my testing, with only a view additional tweaks to the parameters, I was able to move Y Axis at 520IPM.  We still have some minor tuning to do.  The plan moving forward is to reuse the same parameters for the X and Z Axis.  Below is the first video showing of the testing on the Y Axis.

<a href="http://www.youtube.com/v/D6XgBxpQ4Pc&amp;hl=en&amp;fs=1&amp;rel=0&amp;color1=0x006699&amp;color2=0x54abd6&amp;border=1" target="_blank" rel="noopener noreferrer" class="bbc_link bbc_flash_disabled new_win">http://www.youtube.com/v/D6XgBxpQ4Pc&amp;hl=en&amp;fs=1&amp;rel=0&amp;color1=0x006699&amp;color2=0x54abd6&amp;border=1</a>

Thanks
JH

103

Show"N"Tell ( Your Machines) / Speed – Torque Curves

« on: November 09, 2011, 11:53:40 AM »

Hood, I plan to use these for the XYZ axis.

The ball screws are 10mm/turn and have a direct connection to the motor shaft (1:1 drive ratio).  Therefore the higher torque 1000RPM servos were picked to evaluate.  At 1000 RPMs the max travel speed calculates to 393.7 IPM which is fast enough for my application. 

According to Speed – Torque curves, the Torque falls off at 1500 RPMs which calculates to 590 IPM and that would be great for my rapids if this works out!

Thanks
JH

104

Show"N"Tell ( Your Machines) / AC Test Servo

« on: November 07, 2011, 02:59:55 PM »

Our new test servo from Mach Motion just showed too.  This is the HIGH torque version, 85in/LB holding with 254in/LB Peak, 1000W AC Servo…   I hope to have some good news on this real soon.

Thanks,
JH

105

Show"N"Tell ( Your Machines) / ATC Screen and Macros

« on: November 07, 2011, 02:51:08 PM »

Progress was made on the ATC Screen and Macros, it now supports 24 tools.  The INC and DEC carousel position macros are complete.  The INIT ATC Macro is functional as it finds home, but still needs the ATC RAM and Spindle Drawbar functionality before it’s completed.

I did get my Modbus I/O M1 and M12 boards up and running with the help Arturo (user error on my part).  They are now controlling the outputs for the solenoids of the RAM, Drawbar and Air Blast and are monitoring the home and extended switches.  These should be integrated into the Macros shortly so the ATC INIT Macro can be 100% completed.

INC and DEC Macros Attached

Thanks
JH

106

General Mach Discussion / Re: Dynamic Steps per Unit for fast rapids

« on: November 02, 2011, 06:46:41 PM »

You limited to how fast Mach can drive the pulse train.  If your machine has .0001 per step, you rapids might cap out at say at 400IPM.  If you wanted 1000IPM for rapids, you could dynamically change the scale to .001 and change/scale the distance.  Then change it back for feed rates moves.

You would only have to trap the rapid calls for G0.  If the code block contained G0, change both the scale and the distance to increase your rapid speed that is limited by the pulse train.  Once the move is completed, you change it back.

107

General Mach Discussion / Dynamic Steps per Unit for fast rapids

« on: November 02, 2011, 06:20:30 PM »

I was wondering if anyone had ever dynamically changed the Steps Per Unit to allow for faster rapids?

This would allow you to have very high steps per unit for the accuracy during cutting, then dynamically change the Steps Per Unit with SetParam(ParamName As String, ParamVal As Double), perform the rapid move, then set it back.

I am not sure how you could trap the rapid moves to set this parameter, possibly change the post processor to generate an M code between rapids and feed rates ?

Thoughts on this ?

Thanks,
JH

108

Show"N"Tell ( Your Machines) / Re: 1997 DYNA MYTE DM4800 VMC to Mach3 Conversion

« on: October 28, 2011, 09:13:12 PM »

HELP     
i just purchused a dm4500 1995  im having trouble getting this machine to do anything in mdi memory.I can zero return it i think but thats it ive talk to the original owner it was running about 4 months ago replace the battery and restarted the process really need help im in ma.   NEED HELP


WAYNE

508 6413239

You try the zone for help.

http://www.cnczone.com/forums/dyna_mechtronics/

Thanks,
JH

109

Show"N"Tell ( Your Machines) / Re: 1997 DYNA MYTE DM4800 VMC to Mach3 Conversion

« on: October 18, 2011, 02:20:50 PM »

Yes, VB script for the logic and error handling.  I plan to use both PP I/O and some ModBus I/O for this DM4800 project.  Any I/O will work as long as you can write a macro to access the hardware.

I have attached my M6Start Macro that I used on a BridgePort 412.  I plan to use this and modify it for the DM4800.  

If it works for you, then I'll take credit, if it doesn't work, I didn't write it

Thanks,
JH

110

Show"N"Tell ( Your Machines) / ATC Carousel Update

« on: October 17, 2011, 12:39:22 PM »

The ATC Carousel circuit was constructed and installed into the machine.  Wrote some test macros to verify that Mach3 can rotate the carousel in both directions using the DIR and ON/OFF control lines.

The INDEX switch has been added and a new flag was tack welded to the rotating motor plate.  I made the flag long enough to indicate that the entire range is a valid INDEX position while allowing the motor to decelerate and stop from both directions.  The HOME switch has been mounted but the HOME flag needs to be constructed and attached.  Once the sensors are installed, the BP412 Carousel Code will be modified to support 24 positions and tested.

Thanks
JH