Strange Buddy Issue

[archis]

I've noticed for a couple of weeks that my Buddy seems to slow to a crawl at certain unexpected times. I've attached a snippet a file that is currently giving me trouble.

Do anyone have any ideas why starting at line 38 (see comment in code) , my positive x moves go really really slow. The very next negative x move is back to normal speed.

Thanks,
Jim



'Toolpath Name = Pocket 2
'Tool Name = 1/4" Down-Cut Bit (57-910)
'&ToolName = "1/4" Down-Cut Bit (57-910)"
&Tool =3 'Jog Z axis to safe height
C9
TR,14000
C6 'Return tool to home in x and y
PAUSE 2
'
MS,1.5,0.2
JZ,0.800000
J2,0.000000,0.000000
J3,6.375000,28.437500,0.200000
M3,6.375000,28.437500,-0.250000
M3,21.375000,28.437500,-0.250000
M3,21.375000,28.562500,-0.250000
M3,6.375000,28.562500,-0.250000
M3,6.375000,28.437500,-0.250000
J3,6.375000,28.437500,0.200000
M3,6.375000,28.437500,-0.500000

>>>>>>>>>>>>>>>>>> Line 38 is below

M3,21.375000,28.437500,-0.500000
M3,21.375000,28.562500,-0.500000
M3,6.375000,28.562500,-0.500000
M3,6.375000,28.437500,-0.500000
J3,6.375000,28.437500,0.200000
J3,6.375000,20.937500,0.200000
M3,6.375000,20.937500,-0.250000
M3,21.375000,20.937500,-0.250000
M3,21.375000,21.062500,-0.250000
M3,6.375000,21.062500,-0.250000
M3,6.375000,20.937500,-0.250000
J3,6.375000,20.937500,0.200000
M3,6.375000,20.937500,-0.500000
M3,21.375000,20.937500,-0.500000
M3,21.375000,21.062500,-0.500000

[archis]

OK I think this is a bug.

When experienced the problem I had my tool configured as

Feed Rate 90 In/Sec
Plunge Rate 15 In/Sec

If I modify my tool to


Feed Rate 90 In/Sec
Plunge Rate 90 In/Sec

My Buddy does not slow down.

So, it looks like at line 38 my buddy is stuck at the plunge rate used for line 37 until the x goes from positive to negative. Not Good.

[dana_swift]

No shopbot goes 90 inches per second. 15-30 inches per second is a very normal jog speed range.

Do you mean inches per minute? If not those values are probably causing problems as the machine cannot go that fast.

Hope that helps-

D

[archis]

Dana,

Sorry I meant Inches per Minute. Try it yours, I'll bet you'll get the same results, unless of course I'm behind on a control software update :D

[Brady Watson]

Check your VR settings and make sure that the first value, XY Move Ramp Speed is set to .4 IPS.

FYI - your Z speed @ 15 IPM = .25 inches per second. Your tool will NEVER go this slow with the XY Move Ramp Speed set at the default .4 IPS. This is the slowest the tool is allowed to go, unless you lower it. Lowering it is only for small intricate files that require lower starting speed. By lowering it below .4 you will get slow & soggy movements in & out of corners or other areas that are sharp enough to trigger ramping.

If you are unsure, reset VR to default.

-B

[garyc]

Jim...
Can you post the SB3 version you are using?

[Help] > [About]

[archis]

Gary,

I'm running Version 3.6.32.

Brady,

My VR is set to .4

Thanks,
Jim

[garyc]

Jim...
I am not sure that ver 3.6.32 was the one, but there was an issue with some segments cutting at ramp speed. Try upgrading to the current version and see if that solves it.

Note: dont forget to back up your SbParts folder

[archis]

Gary,

I'm not sure how a ramp speed bug could be the issue here. If I set my tools plunge speed to be the same as the feed rate, I don't see the issue. That seems to be telling me that the control software is using the plunge rate for the feed rate after a plunge.