plasma collision error

All things related to the Centroid Acorn Plasma system.

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Skipster67
Posts: 11
Joined: Wed Jan 05, 2022 3:15 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
MPU11 & GPIO4D -w/ 3rd Party Drives: No
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No
CNC Control System Serial Number: none

Re: plasma collision error

Post by Skipster67 »

Hey Shawn, I looked up the lead screws and they are 2 turns per inch and not metric. However the z axis ball screw im not so sure about I'll let you know how i make out. I do know if i go to fast the lead screws tend to wip to much. I have a large ball screw and 1 gear drive not sure which one I want to double up and use on the Y in the end. Will not be in the garage till Monday night. Closing camp this weekend. So if i dont post updates its just because there hasn't been anything new. Thanks again.
cnckeith
Posts: 4664
Joined: Wed Mar 03, 2010 4:23 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: Yes
Oak CNC controller: Yes
MPU11 & GPIO4D -w/ 3rd Party Drives: Yes
DC3IOB: Yes
CNC11: Yes
CPU10 or CPU7: Yes
CNC Control System Serial Number: none
Contact:

Re: plasma collision error

Post by cnckeith »

Skipster67 wrote: Thu Sep 22, 2022 8:27 pm Hey Shawn, I looked up the lead screws and they are 2 turns per inch and not metric. However the z axis ball screw im not so sure about I'll let you know how i make out. I do know if i go to fast the lead screws tend to wip to much. I have a large ball screw and 1 gear drive not sure which one I want to double up and use on the Y in the end. Will not be in the garage till Monday night. Closing camp this weekend. So if i dont post updates its just because there hasn't been anything new. Thanks again.
two turns per inch will work, belt 1:1 with axis motor.

as far as whip is concerned that is based on ballscrew diameter and will limit the max rpm. so the setup you have will be a compromise between max rate of the axis and max rpm of the ballscrew. trial and error testing will determine the max rate you can move an axis and therefore the minimum thickness material you can cut.

i'd consider converting the machine to helical rack and pinion if you want to cut thin materials so them machine can achieve the speeds necessary to cut those thinner materials.
Need support? READ THIS POST first. http://centroidcncforum.com/viewtopic.php?f=60&t=1043
All Acorn Documentation is located here: viewtopic.php?f=60&t=3397
Answers to common questions: viewforum.php?f=63
and here viewforum.php?f=61
Gear we use but don't sell. https://www.centroidcnc.com/centroid_di ... _gear.html
cnckeith
Posts: 4664
Joined: Wed Mar 03, 2010 4:23 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: Yes
Oak CNC controller: Yes
MPU11 & GPIO4D -w/ 3rd Party Drives: Yes
DC3IOB: Yes
CNC11: Yes
CPU10 or CPU7: Yes
CNC Control System Serial Number: none
Contact:

Re: plasma collision error

Post by cnckeith »

Skipster67 wrote: Thu Sep 22, 2022 8:27 pm Hey Shawn, I looked up the lead screws and they are 2 turns per inch and not metric. However the z axis ball screw im not so sure about I'll let you know how i make out. I do know if i go to fast the lead screws tend to wip to much. I have a large ball screw and 1 gear drive not sure which one I want to double up and use on the Y in the end. Will not be in the garage till Monday night. Closing camp this weekend. So if i dont post updates its just because there hasn't been anything new. Thanks again.
always test machine movement before cutting so you know and are familiar with its operating parameters and adjust mechanicals to put the machine in the plasma sweet spot as outlined in the Plasma Manual.

with steps per rev on drive set to 1600 or higher

and overall turns ratio of 1 or higher but not to exceed 2.5.....

Test and verify machine motion (without cutting) write a g code program or use MDI

G0x48y48
G0x0y0

observe and adjust

- accell/decell

- max rate (increase until fail, then back off 20%)

then do same for Z axis.

for good motion. once max rate is determined then you know that if you ask the machine to move faster than that in the profile manager it wont be able to do it. etc.

if good motion can not be achieved mechanical adjustments will be necessary. such as but not limited to. Axis motor type and size change, overall turns ratio change so the motor used has the power and speed needed to move that axis in the Plasma Sweet spot.
Need support? READ THIS POST first. http://centroidcncforum.com/viewtopic.php?f=60&t=1043
All Acorn Documentation is located here: viewtopic.php?f=60&t=3397
Answers to common questions: viewforum.php?f=63
and here viewforum.php?f=61
Gear we use but don't sell. https://www.centroidcnc.com/centroid_di ... _gear.html
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