[mbservice]

Check your speed parameters

[Abon]

Check your speed parameters

Thanks for your advice. Could you be more precise on which parameters I should modify? On this TNC 145 I have 54 parameters. Here is the list of those mentioning something about speed with the value I entered:

MP 0 (rapid traverse X) : 5000
MP 1 (rapid traverse Y) : 5000
MP 2 (rapid traverse Z) : 5000

MP 5 (approach speed) : 1.00
MP 6 (acceleration) : 0.200

MP 16 (Speed upon reference mark approach) : 1000

MP 21 (Speed pre-control) : ON

MP 38 (Radial acceleration with circular movement) : 0.100

MP 45 (External feed rate potentiometer) : 2

All the MP comes from this documents here attached

[cybermaus]

Hi

not sure if this is still an issue (as it is 6 months old)

I had the same issue on a TNC155 because of the same cause (lost parameters and added from a similar machine)
In my case, the cause was that my XY spindels were reversed from that other machine, so they ran in the wrong direction.

So in my case, the spindle was mirrored (left instead of right handed thread), but it is also possible that the encoder wires are simply swapped, or the, or the drive polarity is connected the wrong way around.

I fixed it my changing both "counting direction" and the "drive polarity"
In your case, if the table is moving in the correct direction, you maybe should not swap MP24/MP24, but you should only swap MP20/MP21. Or alternatively, swap the actual wiring.

By the way, in my case my spindle was actually reversed (left instead of right handed), but it is also possible that the encoder wires are simply connected the wrong way around, or the drive polarity is connected the wrong way around.

I drop the other parameters I messed with too, though you probably do not need to change those.

My notes:

Issue 3) Modify Machine Parameters
No Machine Parameters were present for this machine. We rebuild them based on Machine (2) parameters
To enter individual Machine Parameters.
-	Press MOD (the bottom-right one)
-	Walk down to Code, and enter code 95148
-	You can walk up/down, or use GOTO
-	When done, press ENT and then END
-	Depending on the parameter changed, the machine may reset
Spindle Direction Parameters
It turns out Machine (1) has X and Y spindles turning the opposite direction from Machine (2), whose machine parameters we copied. So we had to change the spindle and position count directions
	Old	New	
MP20	1	0	X counting direction
MP21	1	0	Y counting direction
MP24	0	1	X drive polarity
MP25	0	1	Y drive polarity

Changed Calibration Parameters
Software limits were tuned to avoid running into hardware limit switch
	Old	 New	
MP44	+8.500	 +6.600		X+ limit
MP45	-448.600 +450.500	X- limit
MP46	+6.500	 +7.200		Y+ limit
MP47	-298.600 -297.900	Y- limit
MP48	+8.000			Z+ limit
MP49	-119.100		Z- limit

Changed Configuration Parameters
	Old	New	
MP92	0	3	3=English/Decimal point; 0=Dutch/Comma
MP217	0 P	0 P	0 = Klartext Dialog; 1=ISO G-codes
MP222	168	168	V24 RS232 definitions (see manual)
MP223	0		0=Normal, 1=Blockwise transfer (seems to work with 0 too though??